SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K Current Report Pursuant To Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): ~~May~~June 2725, 2003 AMERIQUEST MORTGAGE SECURITIES INC. (as depositor, Ameriquest Mortgage Company, Master Servicer, and Deutsche Bank National Trust Company, as Trustee). ASSET BACKED PASS THROUGH CERTIFICATES SERIES 2003-4 (Exact name of Registrant as specified in its Charter) DELAWARE (State or Other Jurisdiction of Incorporation) 333-103335-02 33-0885129 (Commission File Number) (I.R.S. Employer Identification No.) 1100 TOWN & COUNTRY ROAD, SUITE 1100 ORANGE, CALIFORNIA 92868 (Address of principal executive offices) (Zip Code) Registrant's Telephone Number, Including Area Code: (714) 541-9960 Item 5. Other Events Attached hereto is a copy of the Monthly Remittance Statements to the Certificateholders which was derived from the monthly information submitted by the Master Servicer of the Trust to the Trustee. Item 7. Financial Statement and Exhibits Exhibits: (as noted in Item 5 above) Monthly Remittance Statement to the Certificateholders dated as of ~~May~~June 2725, 2003. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized. Deutsche Bank National Trust Company, not in its individual capacity, but solely as a duly authorized agent of the Registrant pursuant to the Pooling and Servicing Agreement, dated as of April 1,2003. Date: ~~Jun~~Jul 02, 2003 By: /s/ David Co David Co Vice President EXHIBIT INDEX DOCUMENT Monthly Remittance Statement to the Certificateholders dated as of ~~May~~June 2725, 2003.

	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	May 27, 2003 Distribution
	June 25, 2003 Distribution
	Contents
			TABLE OF CONTENTS
								Page
			1.	Contents				1
			2.	Certificate Payment Report				2
			3.	Collection Account Report				4
			4.	Credit Enhancement Report				7
			5.	Collateral Report				8
			6.	Delinquency Report				11
			7.	REO Report				12
			8.	Foreclosure Report				13
			9.	Prepayment Report				14
			10.	Prepayment Detail Report				17
			11.	Realized Loss Report				18
			12.	Realized Loss Detail Report				21
			13.	Triggers, Adj. Rate Cert. and Miscellaneous Report				22
				Total Number of Pages				22
			CONTACTS
				Administrator: Valerie Delgado
				Direct Phone Number: (714)247-6273
				Address: Deutsche Bank
				1761 E. St. Andrew Place, Santa Ana, CA 92705
				Web Site: https://www.corporatetrust.db.com/invr
				Factor Information: (800) 735-7777
				Main Phone Number: (714) 247-6000
ISSUANCE INFORMATION
	Seller:		~~Advanta~~Ameriquest ~~Mortgage~~Mtg ~~Conduit~~Sec ~~Services,~~ Inc.					Cut-Off Date: April 1, 2003
	Certificate Insurer(s):							Closing Date: April 4, 2003
								First Payment Date: May 25, 2003
	Servicer(s):		Ameriquest Mortgage Corp Master Servicer
								Distribution Date: May 27, 2003
								Distribution Date: June 25, 2003
	Underwriter(s):		Blaylock & Partners, L.P. ~~Co-Lead~~ Underwriter					Record Date: ~~May~~June 2324, 2003
								April 30, 2003
								May 30, 2003
						Page 1 of 22					© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	REMIC II
	Certificate Payment Report for May 27, 2003 Distribution
	Certificate Payment Report for June 25, 2003 Distribution
	Distribution in Dollars - Current Period
					Prior						Current
	Class	Original			Principal			Total	Realized	Deferred	Principal
Class	Type	Face Value			Balance	Interest	Principal	Distribution	Losses	Interest	Balance
					(1)	(2)	(3)	(4)=(2)+(3)	(5)	(6)	(7)=(1)-(3)-(5)+(6)
A-1		330,090,000.00			~~330~~327,~~090~~307,~~000~~282.0066	~~831~~456,~~001~~139.5807	24,~~782~~070,~~717~~939.3449	34,~~613~~527,~~718~~078.9256	-	-	~~327~~323,~~307~~236,~~282~~343.6617
M-1		27,000,000.00			27,000,000.00	8346,~~475~~110.00	-	8346,~~475~~110.00	-	-	27,000,000.00
M-2		15,000,000.00			15,000,000.00	7038,~~666~~908.6733	-	7038,~~666~~908.6733	-	-	15,000,000.00
M-3		9,000,000.00			9,000,000.00	5329,~~662~~507.50	-	5329,~~662~~507.50	-	-	9,000,000.00
M-4		4,000,000.00			4,000,000.00	2916,~~738~~336.8967	-	2916,~~738~~336.8967	-	-	4,000,000.00
M-5		5,000,000.00			5,000,000.00	3720,~~173~~420.6283	-	3720,~~173~~420.6283	-	-	5,000,000.00
CE		9,826,613.04			9,~~826~~995,~~613~~713.0400	12,~~283~~065,~~007~~724.9185	-	12,~~283~~065,~~007~~724.9185	-	~~169,099.96~~-	9,995,713.00
P		100.00			100.00	4976,~~497~~288.9322	-	4976,~~497~~288.9322	-	-	100.00
R		-			-	-	-	-	-	-	-
R-X		-			-	-	-	-	-	-	-
Total		399,916,713.04			~~399~~397,~~916~~303,~~713~~095.0466	2,~~438~~749,~~224~~435.1047	24,~~782~~070,~~717~~939.3449	56,~~220~~820,~~941~~374.4496	-	~~169,099.96~~-	~~397~~393,~~303~~232,~~095~~156.6617
	Interest Accrual Detail				Current Period Factor Information per $1,000 of Original Face
						Orig. Principal	Prior				Current
	Period	Period				(with Notional)	Principal			Total	Principal
Class	Starting	Ending		Method	Cusip	Balance	Balance	Interest	Principal	Distribution	Balance
							(1)	(2)	(3)	(4)=(2)+(3)	(5)
A-1	0405/0427/03	0506/2624/03		A-30/360	03072SFM2	330,090,000.00	~~1,000~~991.~~000000~~569822	21.~~517500~~381863	812.~~430178~~332817	1013.~~947678~~714680	~~991~~979.~~569822~~237006
M-1	0405/0427/03	0506/2624/03		A-Act/360	03072SFN0	27,000,000.00	1,000.000000	31.~~091667~~707778	-	31.~~091667~~707778	1,000.000000
M-2	0405/0427/03	0506/2624/03		A-Act/360	03072SFP5	15,000,000.00	1,000.000000	42.~~711111~~593889	-	42.~~711111~~593889	1,000.000000
M-3	0405/0427/03	0506/2624/03		A-Act/360	03072SFQ3	9,000,000.00	1,000.000000	53.~~962500~~278611	-	53.~~962500~~278611	1,000.000000
M-4	0405/0427/03	0506/2624/03		A-Act/360	03072SFR1	4,000,000.00	1,000.000000	74.~~434723~~084168	-	74.~~434723~~084168	1,000.000000
M-5	0405/0427/03	0506/2624/03		A-Act/360	03072SFS9	5,000,000.00	1,000.000000	74.~~434724~~084166	-	74.~~434724~~084166	1,000.000000
CE				A-30/360		9,826,613.04	1,~~000~~017.~~000000~~208367	~~130~~210.~~564612~~217380	-	~~130~~210.~~564612~~217380	1,017.208367
P				A-30/360		100.00	1,000.000000	~~494~~762,~~979~~882.~~300000~~200000	-	~~494~~762,~~979~~882.~~300000~~200000	1,000.000000
R				A-Act/360		-	-	-	-	-	-
R-X				A-Act/360		-	-	-	-	-	-
							Page 2 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	REMIC II
	Certificate Payment Report for May 27, 2003 Distribution
	Certificate Payment Report for June 25, 2003 Distribution
	Distribution in Dollars - to Date
											Current
	Original				Unscheduled	Scheduled	Total	Total	Realized	Deferred	Principal
Class	Face Value		Interest		Principal	Principal	Principal	Distribution	Losses	Interest	Balance
	(1)		(2)		(3)	(4)	(5)=(3)+(4)	(6)=(2)+(5)	(7)	(8)	(9)=(1)-(5)-(7)+(8)
A-1	330,090,000.00		~~831~~1,~~001~~287,140.5865		26,~~325~~108,~~226~~344.9454	~~457~~745,~~490~~312.4029	26,~~782~~853,~~717~~656.3483	38,~~613~~140,~~718~~797.9248	-	-	~~327~~323,~~307~~236,~~282~~343.6617
M-1	27,000,000.00		83129,~~475~~585.00		-	-	-	83129,~~475~~585.00	-	-	27,000,000.00
M-2	15,000,000.00		70109,~~666~~575.6700		-	-	-	70109,~~666~~575.6700	-	-	15,000,000.00
M-3	9,000,000.00		5383,~~662~~170.5000		-	-	-	5383,~~662~~170.5000	-	-	9,000,000.00
M-4	4,000,000.00		2946,~~738~~075.8956		-	-	-	2946,~~738~~075.8956	-	-	4,000,000.00
M-5	5,000,000.00		3757,~~173~~594.6245		-	-	-	3757,~~173~~594.6245	-	-	5,000,000.00
CE	9,826,613.04		13,~~283~~348,~~007~~732.9176		-	-	-	13,~~283~~348,~~007~~732.9176	-	169,099.96	9,995,713.00
P	100.00		49125,~~497~~786.9315		-	-	-	49125,~~497~~786.9315	-	-	100.00
R	-		-		-	-	-	-	-	-	-
R-X	-		-		-	-	-	-	-	-	-
Total	399,916,713.04		25,~~438~~187,~~224~~659.1057		26,~~325~~108,~~226~~344.9454	~~457~~745,~~490~~312.4029	26,~~782~~853,~~717~~656.3483	512,~~220~~041,~~941~~316.4440	-	169,099.96	~~397~~393,~~303~~232,~~095~~156.6617
	Interest Detail
	Pass-	Prior Principal				Non-	Prior	Unscheduled		Paid or	Current
	Through	(with Notional)			Accrued	Supported	Unpaid	Interest	Optimal	Deferred	Unpaid
Class	Rate	Balance			Interest	Interest SF	Interest	Adjustments	Interest	Interest	Interest
					(1)	(2)	(3)	(4)	(5)=(1)-(2)+(3)+(4)	(6)	(7)=(5)-(6)
A-1	1.~~71000~~73000%	~~330~~327,~~090~~307,~~000~~282.0066			~~831~~456,~~001~~139.5807	-	-	-	~~831~~456,~~001~~139.5807	~~831~~456,~~001~~139.5807	-
M-1	2.~~10000~~12000%	27,000,000.00			8346,~~475~~110.00	-	-	-	8346,~~475~~110.00	8346,~~475~~110.00	-
M-2	3.~~20000~~22000%	15,000,000.00			7038,~~666~~908.6733	-	-	-	7038,~~666~~908.6733	7038,~~666~~908.6733	-
M-3	4.~~05000~~07000%	9,000,000.00			5329,~~662~~507.50	-	-	-	5329,~~662~~507.50	5329,~~662~~507.50	-
M-4	45.~~34438~~07000%	4,000,000.00			2916,~~738~~336.8967	-	-	-	2916,~~738~~336.8967	2916,~~738~~336.8967	-
M-5	45.~~34438~~07000%	5,000,000.00			3720,~~173~~420.6283	-	-	-	3720,~~173~~420.6283	3720,~~173~~420.6283	-
CE	46.~~38529~~23924%	9,~~826~~995,~~613~~713.0400			12,~~283~~065,~~007~~724.9185	-	-	-	12,~~283~~065,~~007~~724.9185	12,~~452~~065,~~107~~724.8785	-
P		100.00			4976,~~497~~288.9322	-	-	-	4976,~~497~~288.9322	4976,~~497~~288.9322	-
R		-			-	-	-	-	-	-	-
R-X		-			-	-	-	-	-	-	-
Total		~~399~~397,~~916~~303,~~713~~095.0466			2,~~438~~749,~~224~~435.1047	-	-	-	2,~~438~~749,~~224~~435.1047	2,~~607~~749,~~324~~435.0647	-
							Page 3 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	Collection Account Report for May 27, 2003 Distribution
	Collection Account Report for June 25, 2003 Distribution
	Collection Account Report
SUMMARY								TOTAL
	Principal Collections							24,~~613~~070,~~617~~939.3849
	Principal Other Accounts							0.00
	TOTAL NET PRINCIPAL							24,~~613~~070,~~617~~939.3849
	Interest Collections							2,~~594~~694,~~165~~146.1623
	Interest Withdrawals							0.00
	Interest Other Accounts							4976,~~497~~288.9322
	Interest Fees							(3620,~~339~~998.0397)
	TOTAL NET INTEREST							2,~~607~~749,~~324~~435.0648
	TOTAL AVAILABLE FUNDS FOR DISTRIBUTION							56,~~220~~820,~~941~~374.4497
PRINCIPAL - COLLECTIONS								TOTAL
	Scheduled Principal Received							~~288~~287,~~390~~821.4489
	Prepayments In Full							13,~~732~~634,~~855~~738.7429
	Curtailments							4324,~~283~~213.4762
	Liquidations							0.00
	Insurance Principal							0.00
	Repurchased Principal Amounts							~~549~~124,~~087~~165.7369
	Other Principal							0.00
	Total Realized Loss Of Principal							0.00
	Delinquent Principal							(~~229~~232,~~108~~005.4239)
	Advanced Principal							~~229~~232,~~108~~005.4239
	TOTAL PRINCIPAL COLLECTED							24,~~613~~070,~~617~~939.3849
				Page 4 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	Collection Account Report for May 27, 2003 Distribution
	Collection Account Report for June 25, 2003 Distribution
	Collection Account Report
PRINCIPAL - WITHDRAWALS								TOTAL
SPACE INTENTIONALLY LEFT BLANK
PRINCIPAL - OTHER ACCOUNTS								TOTAL
	TOTAL OTHER ACCOUNTS PRINCIPAL							0.00
INTEREST - COLLECTIONS								TOTAL
	Scheduled Interest							2,~~722~~773,~~509~~321.5134
	Liquidation Interest							0.00
	Repurchased Interest							41,~~114~~303.8074
	Insurance Interest							0.00
	Other Interest							0.00
	Relief Act Interest Shortfalls							0.00
	Prepayment Interest Shortfalls							(12,~~466~~111.8561)
	Compensating Interest							12,~~466~~111.8561
	Delinquent Interest							(2,~~171~~202,~~681~~164.0660)
	Interest Advanced							2,~~039~~121,~~221~~685.9175
	TOTAL INTEREST COLLECTED							2,~~594~~694,~~165~~146.1623
				Page 5 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	Collection Account Report for May 27, 2003 Distribution
	Collection Account Report for June 25, 2003 Distribution
	Collection Account Report
INTEREST - WITHDRAWALS								TOTAL
	Trust Fund Expenses							0.00
	Nonrecoverable Advances							0.00
	Reimbursements to Master Servicer							0.00
	TOTAL INTEREST WITHDRAWALS							0.00
INTEREST - OTHER ACCOUNTS								TOTAL
	Prepayment Charges							4976,~~497~~288.9322
	Capitalized Interest Requirement							0.00
	TOTAL INTEREST OTHER ACCOUNTS							4976,~~497~~288.9322
INTEREST - FEES								TOTAL
	Current Servicing Fees							3418,~~172~~846.8191
	Trustee Fee							2,~~166~~152.2206
	TOTAL INTEREST OTHER FEES							3620,~~339~~998.0397
				Page 6 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	Credit Enhancement Report for May 27, 2003 Distribution
	Credit Enhancement Report for June 25, 2003 Distribution
	Credit Enhancement Report
ACCOUNTS								TOTAL
	Net WAC Rate Carryover Reserve Account							1,000.00
INSURANCE								TOTAL
SPACE INTENTIONALLY LEFT BLANK
STRUCTURAL FEATURES								TOTAL
	Overcollateralized Amount							9,995,713.00
	Overcollateralization Release Amount							0.00
	Overcollateralization Deficiency Amount							~~169,099~~0.9600
	Overcollateralization Target Amount							9,995,713.00
	Excess Overcollateralization Amount							0.00
	Overcollateralization Increase Amount							~~169,099~~0.9600
				Page 7 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	Collateral Report for May 27, 2003 Distribution
	Collateral Report for June 25, 2003 Distribution
	Collateral Report
COLLATERAL								TOTAL
	Loan Count:
	Original							2844
	Prior							-2,829
	Prefunding							-
	Scheduled Paid Offs							-
	Full Voluntary Prepayments							(1022)
	Repurchases							(51)
	Liquidations							-
	Current							2,~~829~~806
	Principal Balance:
	Original							399,916,713.04
	Prior							-397,303,095.66
	Prefunding							-
	Scheduled Principal							(~~288~~287,~~390~~821.4489)
	Partial and Full Voluntary Prepayments							(13,~~776~~658,~~139~~951.2191)
	Repurchases							(~~549~~124,~~087~~165.7369)
	Liquidations							-
	Current							~~397~~393,~~303~~232,~~095~~156.6617
PREFUNDING								TOTAL
SPACE INTENTIONALLY LEFT BLANK
Current Prin Balance by Groups (in millions of dollars)					Total Current Principal Balance (in millions of dollars)
				Page 8 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	Collateral Report for May 27, 2003 Distribution
	Collateral Report for June 25, 2003 Distribution
	Collateral Report
CHARACTERISTICS								TOTAL
	Weighted Average Coupon Original							8.181576%
	Weighted Average Coupon Prior							8.181576%
	Weighted Average Coupon Current							8.~~181576~~380378%
	Weighted Average Months to Maturity Original							353
	Weighted Average Months to Maturity Prior							-353
	Weighted Average Months to Maturity Current							~~353~~352
	Weighted Avg Remaining Amortization Term Original							352
	Weighted Avg Remaining Amortization Term Prior							-352
	Weighted Avg Remaining Amortization Term Current							~~352~~351
	Weighted Average Seasoning Original							2.46
	Weighted Average Seasoning Prior							-2.46
	Weighted Average Seasoning Current							23.4645
Note: Original information refers to deal issue.
WAC by Groups					Total WAC
WARAT by Groups					Total WARAT
Note: Dates correspond to distribution dates.
				Page 9 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	Collateral Report for May 27, 2003 Distribution
	Collateral Report for June 25, 2003 Distribution
	Collateral Report
ARM CHARACTERISTICS								TOTAL
	Weighted Average Margin Original							5.310%
	Weighted Average Margin Prior							05.~~000~~310%
	Weighted Average Margin Current							5.~~310~~304%
	Weighted Average Max Rate Original							12.121%
	Weighted Average Max Rate Prior							012.~~000~~121%
	Weighted Average Max Rate Current							12.~~121~~108%
	Weighted Average Min Rate Original							7.022%
	Weighted Average Min Rate Prior							07.~~000~~022%
	Weighted Average Min Rate Current							7.~~022~~013%
	Weighted Average Cap Up Original							0.850%
	Weighted Average Cap Up Prior							0.~~000~~850%
	Weighted Average Cap Up Current							0.~~850~~849%
	Weighted Average Cap Down Original							0.850%
	Weighted Average Cap Down Prior							0.~~000~~850%
	Weighted Average Cap Down Current							0.~~850~~849%
Note: Original information refers to deal issue.
SERVICING FEES / ADVANCES								TOTAL
	Current Servicing Fees							3418,~~172~~846.8191
	Delinquent Servicing Fees							~~132~~80,~~459~~478.1586
	TOTAL SERVICING FEES							~~166~~99,~~631~~325.9677
	Compensating Interest							(12,~~466~~111.8561)
	Delinquent Servicing Fees							(~~132~~80,~~459~~478.1586)
	COLLECTED SERVICING FEES							3216,~~705~~735.9630
	Aggregate Advances with respect to this Distribution							2,~~268~~353,~~330~~691.3314
	Current Nonrecoverable Advances							0.00
	Cumulative Nonrecoverable Advances							0.00
ADDITIONAL COLLATERAL INFORMATION								TOTAL
	Net Prepayment Interest Shortfall							0.00
				Page 10 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	Delinquency Report for May 27, 2003 Distribution
	Delinquency Report for June 25, 2003 Distribution
	Delinquency Report - Total
				<1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT		Balance			-1,329,425.85	-	-	-1,329,425.85
		% Balance			0.0034%	0.00%	0.00%	0.0034%
		# Loans			-14	-	-	-14
		% # Loans			0.0050%	0.00%	0.00%	0.0050%
FORECLOSURE		Balance		-	-	-	-	-
		% Balance		0.00%	0.00%	0.00%	0.00%	0.00%
		# Loans		-	-	-	-	-
		% # Loans		0.00%	0.00%	0.00%	0.00%	0.00%
BANKRUPTCY		Balance		~~135~~191,~~789~~653.9635	-	-	-	~~135~~191,~~789~~653.9635
		% Balance		0.0305%	0.00%	0.00%	0.00%	0.0305%
		# Loans		12	-	-	-	12
		% # Loans		0.0407%	0.00%	0.00%	0.00%	0.0407%
REO		Balance		-	-	-	-	-
		% Balance		0.00%	0.00%	0.00%	0.00%	0.00%
		# Loans		-	-	-	-	-
		% # Loans		0.00%	0.00%	0.00%	0.00%	0.00%
TOTAL		Balance		~~135~~191,~~789~~653.9635	-1,329,425.85	-	-	~~135~~1,~~789~~521,079.9620
		% Balance		0.0305%	0.0034%	0.00%	0.00%	0.0339%
		# Loans		12	-14	-	-	116
		% # Loans		0.0407%	0.0050%	0.00%	0.00%	0.0457%
Note: <1 Payment = 0-29days, 1 Payment = 30-59days, 2 Payments = 60-89days, 3+ Payments = 90+
								6 Months Moving Average
1 or 2 Payments Delinquent					3 or More Payments Delinquent
Total Foreclosure					Total Bankruptcy and REO
Note: Dates correspond to distribution dates.
				Page 11 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	REO Report for May 27, 2003 Distribution
	REO Report for June 25, 2003 Distribution
	REO Report - Mortgage Loans that Become REO During Current Distribution
SUMMARY				LOAN GROUP
Total Loan Count = 0				Loan Group 1 = Group 1 Group; REO Book Value = 000.00
Total Original Principal Balance = 000.00
Total Current Balance = 000.00
REO Book Value = 000.00
REO Book Value reported corresponds to total REO loans, including loans that become REO during current distribution.
Loan Number		Original	Stated		Current	State &
&		Principal	Principal	Paid to	Note	LTV at	Original	Origination
Loan Group		Balance	Balance	Date	Rate	Origination	Term	Date
SPACE INTENTIONALLY LEFT BLANK
				Page 12 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	Foreclosure Report for May 27, 2003 Distribution
	Foreclosure Report for June 25, 2003 Distribution
	Foreclosure Report - Mortgage Loans that Become Foreclosure During Current Distribution
SUMMARY				LOAN GROUP
Total Loan Count = 0				Loan Group 1 = Group 1 Group
Total Original Principal Balance = 000.00
Total Current Balance = 000.00
Loan Number		Original	Stated		Current	State &
&		Principal	Principal	Paid to	Note	LTV at	Original	Origination
Loan Group		Balance	Balance	Date	Rate	Origination	Term	Date
SPACE INTENTIONALLY LEFT BLANK
				Page 13 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	Prepayment Report for May 27, 2003 Distribution
	Prepayment Report for June 25, 2003 Distribution
	Prepayment Report - Voluntary Prepayments
VOLUNTARY PREPAYMENTS								TOTAL
	Current
	Number of Paid in Full Loans							1022
	Number of Repurchased Loans							51
	Total Number of Loans Prepaid in Full							1523
	Paid in Full Balance							13,~~732~~634,~~855~~738.7429
	Repurchased Loans Balance							~~549~~124,~~087~~165.7369
	Curtailments Amount							4324,~~283~~213.4762
	Total Prepayment Amount							23,~~325~~783,~~226~~117.9460
	Cumulative
	Number of Paid in Full Loans							1032
	Number of Repurchased Loans							56
	Total Number of Loans Prepaid in Full							1538
	Paid in Full Balance							15,~~732~~367,~~855~~594.7403
	Repurchased Loans Balance							~~549~~673,~~087~~253.7342
	Curtailments Amount							4367,~~283~~497.4709
	Total Prepayment Amount							26,~~325~~108,~~226~~344.9454
SPACE INTENTIONALLY LEFT BLANK
Total Prepayments by Groups (in thousands of dollars)					Total Prepayments (in thousands of dollars)
				Page 14 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	Prepayment Report for May 27, 2003 Distribution
	Prepayment Report for June 25, 2003 Distribution
	Prepayment Report - Voluntary Prepayments
VOLUNTARY PREPAYMENT RATES								TOTAL
	SMM							0.5895%
	3 Months Avg SMM
	12 Months Avg SMM
	Avg SMM Since Cut-off							0.5877%
	CPR							610.7685%
	3 Months Avg CPR
	12 Months Avg CPR
	Avg CPR Since Cut-off							68.7683%
	PSA							~~1376~~1572.8431%
	3 Months Avg PSA Approximation
	12 Months Avg PSA Approximation
	Avg PSA Since Cut-off Approximation							~~1376~~1494.8493%
CPR by Groups					Total CPR
PSA by Groups					Total PSA
				Page 15 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	Prepayment Report for May 27, 2003 Distribution
	Prepayment Report for June 25, 2003 Distribution
	Prepayment Report - Voluntary Prepayments
CPR Avg since Cut-Off by Groups					Total CPR Avg since Cut-Off
PSA Avg since Cut-Off by Groups					Total PSA Avg since Cut-Off
PREPAYMENT CALCULATION METHODOLOGY
Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases)/(Beg Principal Balance - Sched Principal)
Conditional Prepayment Rate (CPR): 1-((1-SMM)^12)
PSA Standard Prepayment Model: CPR/(0.02*min(30,WAS))
Average SMM over period between nth month and mth month (AvgSMMn,m): [(1-SMMn) * (1-SMMn+1) .......(1-SMMm)]^(1/months in period n,m)
Average CPR over period between the nth month and mth month (AvgCPRn,m): 1-((1-AvgSMMn,m)^12)
Average PSA Approximation over period between the nth month and mth month: AvgCPRn,m/(0.02*Avg WASn,m))
Average WASn,m: (min(30,WASn)+min(30,WASn+1)+.......+min(30,WASm)/(number of months in the period n,m)
Weighted Average Seasoning (WAS)
Note: Prepayment rates are calculated since deal issue date and include partial and full voluntary prepayments and repurchases.
Dates correspond to distribution dates.
				Page 16 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	Prepayment Detail Report for May 27, 2003 Distribution
	Prepayment Detail Report for June 25, 2003 Distribution
	Prepayment Detail Report - Loans Prepaid in Full During Current Distribution
SUMMARY						LOAN GROUP
Total Loan Count = 15						Loan Group 1 = Group 1 Group
Total Loan Count = 23						Loan Group 1 = Group 1 Group
Total Original Principal Balance = 2,285,600.00
Total Original Principal Balance = 3,772,320.00
Total Prepayment Amount = 2,281,943.47
Total Prepayment Amount = 3,758,903.98
Loan Number			Original			Current	State &	Type Prepayment
&		Loan	Principal	Prepayment	Prepayment	Note	LTV at	&	Origination
Loan Group		Status	Balance	Amount	Date	Rate	Origination	Original Term	Date
39829353 0			128,000.00	127,690.07	May-02-03	9.650%	CA - 80.00%	Paid Off - 360	Oct-23-02
40178410 0			161,500.00	160,898.14	Jun-04-03	8.200%	CA - 85.00%	Paid Off - 360	Dec-10-02
41196940 0			300,000.00	299,579.40	Apr-11-03	7.800%	MA - 75.00%	Paid Off - 360	Jan-07-03
40715997 0			110,000.00	109,727.36	Jun-02-03	6.990%	CO - 61.11%	Paid Off - 360	Jan-24-03
42250423 0			72,000.00	71,900.77	May-01-03	10.500%	IA - 80.00%	Paid Off - 360	Jan-31-03
40730830 0			81,000.00	80,647.33	May-12-03	6.750%	FL - 90.00%	Paid Off - 360	Nov-29-02
42364133 0			191,500.00	191,197.33	Apr-23-03	7.200%	WA - 83.26%	Paid Off - 360	Jan-28-03
40975773 0			222,721.00	221,518.50	Jun-05-03	8.550%	NV - 85.00%	Paid Off - 360	Jan-13-03
42514737 0			266,000.00	265,407.80	Apr-23-03	6.400%	MA - 84.98%	Paid Off - 360	Jan-27-03
41030446 0			179,500.00	179,240.64	May-21-03	7.650%	MA - 69.04%	Paid Off - 360	Feb-06-03
42816702 0			150,000.00	149,859.45	Apr-21-03	9.750%	CA - 44.51%	Paid Off - 360	Jan-30-03
41512443 0			300,699.00	300,261.32	Jun-05-03	10.970%	IL - 70.75%	Paid Off - 360	Jan-31-03
42840140 0			221,850.00	221,704.14	May-02-03	8.100%	MN - 85.00%	Paid Off - 360	Feb-04-03
41950056 0			148,000.00	146,486.93	May-27-03	6.990%	CO - 82.22%	Paid Off - 360	Jan-14-03
42851535 0			90,000.00	89,924.75	Apr-14-03	6.900%	IL - 36.00%	Paid Off - 360	Feb-07-03
42046599 0			54,400.00	54,331.50	Jun-09-03	8.600%	NJ - 85.00%	Paid Off - 360	Feb-04-03
42942938 0			147,000.00	146,900.27	Apr-14-03	11.250%	WA - 42.00%	Paid Off - 360	Jan-31-03
42059709 0			297,000.00	296,200.68	May-22-03	6.800%	MA - 73.70%	Paid Off - 360	Jan-28-03
43191162 0			168,750.00	168,691.76	Apr-22-03	11.150%	CO - 75.00%	Paid Off - 360	Feb-14-03
42090498 0			82,500.00	82,160.60	May-19-03	9.750%	KS - 75.00%	Paid Off - 240	Jan-22-03
38405247 0			92,500.00	92,061.13	Apr-11-03	7.500%	MI - 80.44%	Repur/Subs - 360	Sep-30-02
42148478 0			137,700.00	137,556.09	Jun-02-03	11.150%	UT - 90.00%	Paid Off - 360	Jan-21-03
39977772 0			144,500.00	144,107.46	Apr-11-03	7.990%	MI - 85.00%	Repur/Subs - 360	Nov-13-02
42256602 0			144,000.00	143,707.32	Jun-02-03	7.990%	MN - 80.00%	Paid Off - 360	Jan-21-03
40680431 0			91,500.00	91,322.13	Apr-11-03	9.615%	MI - 75.00%	Repur/Subs - 360	Nov-22-02
42278911 0			127,500.00	127,287.27	Jun-06-03	8.950%	CA - 85.00%	Paid Off - 360	Jan-23-03
40837619 0			102,000.00	101,848.78	Apr-11-03	10.900%	MI - 64.97%	Repur/Subs - 360	Nov-29-02
42288472 0			276,500.00	271,737.00	May-15-03	6.990%	NJ - 65.52%	Paid Off - 240	Jan-27-03
40942351 0			120,000.00	119,748.23	Apr-11-03	9.250%	MI - 75.00%	Repur/Subs - 360	Nov-30-02
42332478 0			264,750.00	264,093.84	May-30-03	6.990%	CA - 75.00%	Paid Off - 360	Jan-15-03
42441741 0			114,300.00	114,145.79	Jun-03-03	7.990%	MI - 90.00%	Paid Off - 360	Feb-13-03
42509737 0			216,000.00	215,807.46	May-14-03	11.875%	WA - 90.00%	Paid Off - 360	Jan-31-03
43030717 0			81,000.00	80,945.04	Jun-02-03	11.250%	MA - 57.86%	Paid Off - 360	Feb-12-03
43258698 0			256,000.00	255,730.75	May-20-03	9.200%	MA - 83.12%	Paid Off - 360	Feb-14-03
43417344 0			114,750.00	114,567.38	May-27-03	8.500%	MA - 84.38%	Paid Off - 360	Feb-13-03
43491604 0			91,000.00	90,914.73	May-29-03	9.750%	CO - 50.56%	Paid Off - 360	Feb-20-03
43546449 0			187,000.00	186,772.62	Jun-09-03	8.500%	CA - 40.04%	Paid Off - 360	Feb-19-03
42999771 0			124,500.00	124,165.69	May-12-03	12.600%	FL - 75.00%	Repur/Subs - 360	Mar-12-03
					Page 17 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	Realized Loss Report for May 27, 2003 Distribution
	Realized Loss Report for June 25, 2003 Distribution
	Realized Loss Report - Collateral
COLLATERAL REALIZED LOSSES								TOTAL
	Current
	Number of Loans Liquidated							-
	Collateral Realized Loss/(Gain) Amount							-
	Net Liquidation Proceeds							-
	Cumulative
	Number of Loans Liquidated							-
	Collateral Realized Loss/(Gain) Amount							-
	Net Liquidation Proceeds							-
	Note: Collateral Realized Loss Amount may include adjustments to loans liquidated in prior periods.
SPACE INTENTIONALLY LEFT BLANK
							3 Months Moving Average
Collateral Loss Severity Approximation by Groups					Collateral Loss Severity Approximation
				Page 18 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	Realized Loss Report for May 27, 2003 Distribution
	Realized Loss Report for June 25, 2003 Distribution
	Realized Loss Report - Collateral
DEFAULT SPEEDS								TOTAL
	MDR							0.00%
	3 Months Avg MDR
	12 Months Avg MDR
	Avg MDR Since Cut-off							0.00%
	CDR							0.00%
	3 Months Avg CDR
	12 Months Avg CDR
	Avg CDR Since Cut-off							0.00%
	SDA							0.00%
	3 Months Avg SDA Approximation
	12 Months Avg SDA Approximation
	Avg SDA Since Cut-off Approximation							0.00%
	Loss Severity Approximation for Current Period
	3 Months Avg Loss Severity Approximation
	12 Months Avg Loss Severity Approximation
	Avg Loss Severity Approximation Since Cut-off
CDR by Groups					Total CDR
SDA by Groups					Total SDA
				Page 19 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	Realized Loss Report for May 27, 2003 Distribution
	Realized Loss Report for June 25, 2003 Distribution
	Realized Loss Report - Collateral
CDR Avg since Cut-Off by Groups					Total CDR Avg since Cut-Off
SDA Avg since Cut-Off by Groups					Total SDA Avg since Cut-Off
COLLATERAL REALIZED LOSS CALCULATION METHODOLOGY
Monthly Default Rate (MDR): (Beg Principal Balance of Liquidated Loans)/(Total Beg Principal Balance)
Conditional Default Rate (CDR): 1-((1-MDR)^12)
SDA Standard Default Assumption: CDR/IF(WAS<61,MIN(30,WAS)0.02,MAX(0.03,MIN(30,WAS)0.02-0.0095*(WAS-60)))
Average MDR over period between nth month and mth month (AvgMDRn,m): [(1-MDRn) * (1-MDRn+1) .......(1-MDRm)]^(1/months in period n,m)
Average CDR over period between the nth month and mth month (AvgCDRn,m): 1-((1-AvgMDRn,m)^12)
Average SDA Approximation over period between the nth month and mth month:
AvgCDRn,m/IF(Avg WASn,m<61,MIN(30,Avg WASn,m)0.02,MAX(0.03,MIN(30,Avg WASn,m)0.02-0.0095*(Avg WASn,m-60)))
Average WASn,m: (WASn + WASn+1 +.......+ WASm )/(number of months in the period n,m)
Loss Severity Approximation for current period: sum(Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)
Average Loss Severity Approximation over period between nth month and mth month: Avg(Loss Severityn,m)
Note: Default rates are calculated since deal issue date and include realized gains and additional realized losses and gains from prior periods.
Dates correspond to distribution dates.
				Page 20 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	Realized Loss Detail Report for May 27, 2003 Distribution
	Realized Loss Detail Report for June 25, 2003 Distribution
	Realized Loss Detail Report - Loans Liquidated During Current Distribution
SUMMARY						LOAN GROUP
Total Loan Count = 0						Loan Group 1 = Group 1 Group
Total Original Principal Balance = 0.00
Total Prior Principal Balance = 0.00
Total Realized Loss Amount = 0.00
Total Net Liquidation Proceeds = 0.00
Note: Total Realized Loss Amount may include adjustments to loans liquidated in prior periods.
Loan Number			Original	Prior		Current	State &
&		Loan	Principal	Principal	Realized	Note	LTV at	Original	Origination
Loan Group		Status	Balance	Balance	Loss/(Gain)	Rate	Origination	Term	Date
SPACE INTENTIONALLY LEFT BLANK
					Page 21 of 22				© COPYRIGHT 2003 Deutsche Bank
	Ameriquest Mortgage Securities, Inc. Series 2003-4
	Mortgage Pass-Through Certificates
	Triggers, Adj. Rate Cert. and Miscellaneous Report for May 27, 2003 Distribution
	Triggers, Adj. Rate Cert. and Miscellaneous Report for June 25, 2003 Distribution
	Triggers, Adj. Rate Cert. and Miscellaneous Report
TRIGGER EVENTS								TOTAL
	Stepdown Date has occurred							No
	Delinquency Percentage							0.0305%
	Balances 60+ days							~~135~~191,~~789~~653.9635
	Ending Balance							~~397~~393,~~303~~232,~~095~~156.6617
	Credit Enhancement Percentage							17.5880%
	Balance of Mezzanine and C Class							69,~~826~~995,~~613~~713.0400
	Ending Balance							~~397~~393,~~303~~232,~~095~~156.6617
	Ending Balance of Fixed Loans - used for Trigger							0.00
	Ending Balance of Adjustable Loans - used for Trigger							0.00
	Trigger Event in effect							No
ADJUSTABLE RATE CERTIFICATE INFORMATION								TOTAL
SPACE INTENTIONALLY LEFT BLANK
ADDITIONAL INFORMATION								TOTAL
	Net WAC Rate Carryover Amt: Class A-1							0.00
	Net WAC Rate Carryover Amt: Class M-1							0.00
	Net WAC Rate Carryover Amt: Class M-2							0.00
	Net WAC Rate Carryover Amt: Class M-3							0.00
	Net WAC Rate Carryover Amt: Class M-4							~~4,155~~0.3000
	Net WAC Rate Carryover Amt: Class M-5							~~5,194~~0.1300
	Net WAC Rate Carryover Amt: Class A-1 unpaid							0.00
	Libor for Current Period							1.~~300000~~320000%
	Net WAC Rate Carryover Amt: Class M-2 unpaid							0.00
	Current Period loan level losses							0.00
	Current Recoveries or Losses from Prior periods							0.00
	Total Current Losses							0.00
				Page 22 of 22				© COPYRIGHT 2003 Deutsche Bank

Filing Compare · ASSET BACKED PASS THROUGH CERTIFICATES SERIES 2003-4