WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.02AR17
Distribution Date: 10/27/2003

Class	Cusip	Orig Prin Bal	Begin Prin Bal	Int Rate Accrued	Int Rate Paid	Int Dist	Prin Dist	Int Shortfall	Prin Loss	Deferred Interest	Int Reimbursed	Unscheduled Int	Prin Reimbursed	Subsequent Recoveries	Total Dist	Ending Class Bal
IA	XXXXXXXXX	$913,619,300.00	$786,495,257.30	2.5786731789%	2.5786731789%	$1,690,095.19	$40,000,842.84	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$41,690,938.02	$746,494,414.46
IIA	XXXXXXXXX	$178,471,000.00	$148,351,058.12	3.2673716888%	3.2583373138%	$402,814.82	$13,060,373.82	$0.00	$0.00	$1,116.88	$0.00	$0.00	$0.00	$0.00	$13,463,188.64	$135,291,801.19
IB1	XXXXXXXXX	$14,312,600.00	$14,201,644.48	2.5786731789%	2.5786731789%	$30,517.83	$25,995.90	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$56,513.73	$14,175,648.58
IB2	XXXXXXXXX	$7,156,300.00	$7,100,822.23	2.5786731789%	2.5786731789%	$15,258.92	$12,997.95	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$28,256.87	$7,087,824.28
IB3	XXXXXXXXX	$7,156,200.00	$7,100,723.01	2.5786731789%	2.5786731789%	$15,258.70	$12,997.77	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$28,256.47	$7,087,725.24
IB4	XXXXXXXXX	$6,202,200.00	$6,154,118.70	2.5786731789%	2.5786731789%	$13,224.55	$11,265.02	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$24,489.57	$6,142,853.68
IB5	XXXXXXXXX	$1,908,300.00	$1,893,506.30	2.5786731789%	2.5786731789%	$4,068.94	$3,466.04	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$7,534.98	$1,890,040.26
IB6	XXXXXXXXX	$3,816,742.85	$3,787,154.30	2.5786731789%	2.5786731789%	$8,138.19	$6,932.30	$0.00	$0.01	$0.00	$0.00	$0.00	$0.00	$0.00	$15,070.49	$3,780,221.99
IIB1	XXXXXXXXX	$3,002,700.00	$3,003,390.15	3.2673716888%	3.2583373138%	$8,155.05	$1,573.88	$0.00	$0.00	$22.61	$0.00	$0.00	$0.00	$0.00	$9,728.93	$3,001,838.88
IIB2	XXXXXXXXX	$1,876,700.00	$1,877,131.34	3.2673716888%	3.2583373138%	$5,096.94	$983.68	$0.00	$0.00	$14.13	$0.00	$0.00	$0.00	$0.00	$6,080.62	$1,876,161.79
IIB3	XXXXXXXXX	$1,219,800.00	$1,220,080.36	3.2673716888%	3.2583373138%	$3,312.86	$639.37	$0.00	$0.00	$9.19	$0.00	$0.00	$0.00	$0.00	$3,952.23	$1,219,450.18
IIB4	XXXXXXXXX	$1,970,500.00	$1,970,952.90	3.2673716888%	3.2583373138%	$5,351.69	$1,032.85	$0.00	$0.00	$14.84	$0.00	$0.00	$0.00	$0.00	$6,384.54	$1,969,934.89
IIB5	XXXXXXXXX	$375,300.00	$375,386.27	3.2673716888%	3.2583373138%	$1,019.28	$196.72	$0.00	$0.00	$2.83	$0.00	$0.00	$0.00	$0.00	$1,215.99	$375,192.38
IIB6	XXXXXXXXX	$750,746.10	$750,918.62	3.2673716888%	3.2583373138%	$2,038.96	$393.51	$0.00	$0.00	$5.65	$0.00	$0.00	$0.00	$0.00	$2,432.46	$750,530.77
R	XXXXXXXXX	$100.00	$0.00	0.0000000000%	0.0000000000%	$0.02	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.02	$0.00
R_SYN	XXXXXXXXX	$0.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
Total		$1,141,838,488.95	$984,282,144.08			$2,204,351.95	$53,139,691.63	$0.00	$0.01	$1,186.13	$0.00	$0.00	$0.00	$0.00	$55,344,043.58	$931,143,638.57

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.02AR17
Distribution Date: 10/27/2003

Class	Orig Face	Beg Bal	Prin Loss	Prin Reimbursed	Subsequent Recoveries	Deferred Interest	Total Prin	End Cert Pct	End Cert Bal
IA	$913,619,300.00	$786,495,257.30	$0.00	$0.00	$0.00	$0.00	$40,000,842.84	0.8170738233	$746,494,414.46
IIA	$178,471,000.00	$148,351,058.12	$0.00	$0.00	$0.00	$1,116.88	$13,060,373.82	0.7580604198	$135,291,801.19
IB1	$14,312,600.00	$14,201,644.48	$0.00	$0.00	$0.00	$0.00	$25,995.90	0.9904314087	$14,175,648.58
IB2	$7,156,300.00	$7,100,822.23	$0.00	$0.00	$0.00	$0.00	$12,997.95	0.9904314073	$7,087,824.28
IB3	$7,156,200.00	$7,100,723.01	$0.00	$0.00	$0.00	$0.00	$12,997.77	0.9904314077	$7,087,725.24
IB4	$6,202,200.00	$6,154,118.70	$0.00	$0.00	$0.00	$0.00	$11,265.02	0.9904314082	$6,142,853.68
IB5	$1,908,300.00	$1,893,506.30	$0.00	$0.00	$0.00	$0.00	$3,466.04	0.9904314102	$1,890,040.26
IB6	$3,816,742.85	$3,787,154.30	$0.01	$0.00	$0.00	$0.00	$6,932.30	0.9904314067	$3,780,221.99
IIB1	$3,002,700.00	$3,003,390.15	$0.00	$0.00	$0.00	$22.61	$1,573.88	0.9997132181	$3,001,838.88
IIB2	$1,876,700.00	$1,877,131.34	$0.00	$0.00	$0.00	$14.13	$983.68	0.9997132147	$1,876,161.79
IIB3	$1,219,800.00	$1,220,080.36	$0.00	$0.00	$0.00	$9.19	$639.37	0.9997132153	$1,219,450.18
IIB4	$1,970,500.00	$1,970,952.90	$0.00	$0.00	$0.00	$14.84	$1,032.85	0.9997132149	$1,969,934.89
IIB5	$375,300.00	$375,386.27	$0.00	$0.00	$0.00	$2.83	$196.72	0.9997132427	$375,192.38
IIB6	$750,746.10	$750,918.62	$0.00	$0.00	$0.00	$5.65	$393.51	0.9997131787	$750,530.77
R	$100.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
R_SYN	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
Total	$1,141,838,488.95	$984,282,144.08	$0.01	$0.00	$0.00	$1,186.13	$53,139,691.63	0.8154775370	$931,143,638.57

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.02AR17
Distribution Date: 10/27/2003
PER $1000 DENOMINATION
Class	Orig Face	Beg Bal	Prin Loss	Prin Reimbursed	Subsequent Recoveries	Deferred Interest	Total Prin	End Cert Pct	End Cert Bal
IA	$913,619,300.00	860.85665802	0.00000000	0.00000000	0.00000000	0.00000000	43.78283475	0.8170738233	817.07382327
IIA	$178,471,000.00	831.23341114	0.00000000	0.00000000	0.00000000	0.00625805	73.17924940	0.7580604198	758.06041984
IB1	$14,312,600.00	992.24770342	0.00000000	0.00000000	0.00000000	0.00000000	1.81629473	0.9904314087	990.43140869
IB2	$7,156,300.00	992.24770202	0.00000000	0.00000000	0.00000000	0.00000000	1.81629473	0.9904314073	990.43140729
IB3	$7,156,200.00	992.24770269	0.00000000	0.00000000	0.00000000	0.00000000	1.81629496	0.9904314077	990.43140773
IB4	$6,202,200.00	992.24770243	0.00000000	0.00000000	0.00000000	0.00000000	1.81629422	0.9904314082	990.43140821
IB5	$1,908,300.00	992.24770738	0.00000000	0.00000000	0.00000000	0.00000000	1.81629723	0.9904314102	990.43141016
IB6	$3,816,742.85	992.24769623	0.00000262	0.00000000	0.00000000	0.00000000	1.81628689	0.9904314067	990.43140672
IIB1	$3,002,700.00	1,000.22984314	0.00000000	0.00000000	0.00000000	0.00752989	0.52415493	0.9997132181	999.71321810
IIB2	$1,876,700.00	1,000.22983961	0.00000000	0.00000000	0.00000000	0.00752917	0.52415410	0.9997132147	999.71321469
IIB3	$1,219,800.00	1,000.22984096	0.00000000	0.00000000	0.00000000	0.00753402	0.52415970	0.9997132153	999.71321528
IIB4	$1,970,500.00	1,000.22984014	0.00000000	0.00000000	0.00000000	0.00753108	0.52415631	0.9997132149	999.71321492
IIB5	$375,300.00	1,000.22986944	0.00000000	0.00000000	0.00000000	0.00754063	0.52416733	0.9997132427	999.71324274
IIB6	$750,746.10	1,000.22979806	0.00000000	0.00000000	0.00000000	0.00752585	0.52415857	0.9997131787	999.71317866
R	$100.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
R_SYN	$0.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.02AR17
Distribution Date: 10/27/2003

Class	Orig Face	Int Rate Accrued	Int Rate Paid	Beg Cert Prin/Not Bal	Curent Int Accrued	Int Shortfall	Unscheduled Int	Int Reimbursed	Total Int Dist
IA	$913,619,300.00	2.5786731789%	2.5786731789%	$786,495,257.30	$1,690,095.19	$0.00	$0.00	$0.00	$1,690,095.19
IIA	$178,471,000.00	3.2673716888%	3.2583373138%	$148,351,058.12	$402,814.82	$0.00	$0.00	$0.00	$402,814.82
IB1	$14,312,600.00	2.5786731789%	2.5786731789%	$14,201,644.48	$30,517.83	$0.00	$0.00	$0.00	$30,517.83
IB2	$7,156,300.00	2.5786731789%	2.5786731789%	$7,100,822.23	$15,258.92	$0.00	$0.00	$0.00	$15,258.92
IB3	$7,156,200.00	2.5786731789%	2.5786731789%	$7,100,723.01	$15,258.70	$0.00	$0.00	$0.00	$15,258.70
IB4	$6,202,200.00	2.5786731789%	2.5786731789%	$6,154,118.70	$13,224.55	$0.00	$0.00	$0.00	$13,224.55
IB5	$1,908,300.00	2.5786731789%	2.5786731789%	$1,893,506.30	$4,068.94	$0.00	$0.00	$0.00	$4,068.94
IB6	$3,816,742.85	2.5786731789%	2.5786731789%	$3,787,154.30	$8,138.19	$0.00	$0.00	$0.00	$8,138.19
IIB1	$3,002,700.00	3.2673716888%	3.2583373138%	$3,003,390.15	$8,155.05	$0.00	$0.00	$0.00	$8,155.05
IIB2	$1,876,700.00	3.2673716888%	3.2583373138%	$1,877,131.34	$5,096.94	$0.00	$0.00	$0.00	$5,096.94
IIB3	$1,219,800.00	3.2673716888%	3.2583373138%	$1,220,080.36	$3,312.86	$0.00	$0.00	$0.00	$3,312.86
IIB4	$1,970,500.00	3.2673716888%	3.2583373138%	$1,970,952.90	$5,351.69	$0.00	$0.00	$0.00	$5,351.69
IIB5	$375,300.00	3.2673716888%	3.2583373138%	$375,386.27	$1,019.28	$0.00	$0.00	$0.00	$1,019.28
IIB6	$750,746.10	3.2673716888%	3.2583373138%	$750,918.62	$2,038.96	$0.00	$0.00	$0.00	$2,038.96
R	$100.00	0.0000000000%	0.0000000000%	$0.00	$0.02	$0.00	$0.00	$0.00	$0.02
R_SYN	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
Total	$1,141,838,488.95			$984,282,144.08	$2,204,351.95	$0.00	$0.00	$0.00	$2,204,351.95

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.02AR17
Distribution Date: 10/27/2003
PER $1000 DENOMINATION
Class	Orig Face	Int Rate Accrued	Int Rate Paid	Beg Cert Prin/Not Bal	Curent Int Accrued	Int Shortfall	Unscheduled Int	Int Reimbursed	Total Int Dist
IA	$913,619,300.00	2.5786731789%	2.5786731789%	860.85665802	1.84988998	0.00000000	0.00000000	0.00000000	1.84988998
IIA	$178,471,000.00	3.2673716888%	3.2583373138%	831.23341114	2.25703235	0.00000000	0.00000000	0.00000000	2.25703235
IB1	$14,312,600.00	2.5786731789%	2.5786731789%	992.24770342	2.13223523	0.00000000	0.00000000	0.00000000	2.13223523
IB2	$7,156,300.00	2.5786731789%	2.5786731789%	992.24770202	2.13223593	0.00000000	0.00000000	0.00000000	2.13223593
IB3	$7,156,200.00	2.5786731789%	2.5786731789%	992.24770269	2.13223499	0.00000000	0.00000000	0.00000000	2.13223499
IB4	$6,202,200.00	2.5786731789%	2.5786731789%	992.24770243	2.13223534	0.00000000	0.00000000	0.00000000	2.13223534
IB5	$1,908,300.00	2.5786731789%	2.5786731789%	992.24770738	2.13223288	0.00000000	0.00000000	0.00000000	2.13223288
IB6	$3,816,742.85	2.5786731789%	2.5786731789%	992.24769623	2.13223430	0.00000000	0.00000000	0.00000000	2.13223430
IIB1	$3,002,700.00	3.2673716888%	3.2583373138%	1,000.22984314	2.71590568	0.00000000	0.00000000	0.00000000	2.71590568
IIB2	$1,876,700.00	3.2673716888%	3.2583373138%	1,000.22983961	2.71590558	0.00000000	0.00000000	0.00000000	2.71590558
IIB3	$1,219,800.00	3.2673716888%	3.2583373138%	1,000.22984096	2.71590425	0.00000000	0.00000000	0.00000000	2.71590425
IIB4	$1,970,500.00	3.2673716888%	3.2583373138%	1,000.22984014	2.71590459	0.00000000	0.00000000	0.00000000	2.71590459
IIB5	$375,300.00	3.2673716888%	3.2583373138%	1,000.22986944	2.71590727	0.00000000	0.00000000	0.00000000	2.71590727
IIB6	$750,746.10	3.2673716888%	3.2583373138%	1,000.22979806	2.71591154	0.00000000	0.00000000	0.00000000	2.71591154
R	$100.00	0.0000000000%	0.0000000000%	0.00000000	0.20000000	0.00000000	0.00000000	0.00000000	0.20000000
R_SYN	$0.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
10/2003 DISTRIBUTION REPORT
SERIES: WAMU 02AR17
WEIGHTED AVERAGE PC RATE: 2.57867%
WEIGHTED AVERAGE MATURITY: 381.20638
WEIGHTED AVERAGE LOAN AGE: 13.26419
POOL NUMBER: 1956
ISSUE DATE: 10/24/2002
CERTIFICATE BALANCE AT ISSUE: $954,171,742.85
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	1649		$826,733,226.34
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$1,513,322.89
Unscheduled Principal Collection/Reversals		$844,305.31
Liquidations-in-full	71	$37,716,869.64
Subsequent Recoveries		$0.00
Net principal Distributed		$40,074,497.84	-$40,074,497.84

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	1578		$786,658,728.50

SCHEDULED INTEREST AT MORTGAGE RATE:		$2,658,606.47

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Recoveries Carried Forward		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
10/2003 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$882,044.17

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$41,851,060.14

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
10/2003 DISTRIBUTION REPORT
SERIES: WAMU 02AR17
WEIGHTED AVERAGE PC RATE: 3.26737%
WEIGHTED AVERAGE MATURITY: 342.17240
WEIGHTED AVERAGE LOAN AGE: 14.11635
POOL NUMBER: 1957
ISSUE DATE: 10/24/2002
CERTIFICATE BALANCE AT ISSUE: $187,666,746.10
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	329		$157,548,917.77
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$81,375.06
Unscheduled Principal Collection/Reversals		$75,745.76
Liquidations-in-full	27	$12,906,886.87
Subsequent Recoveries		$0.00
Net principal Distributed		$13,064,007.69	-$13,064,007.69

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	302		$144,484,910.08

SCHEDULED INTEREST AT MORTGAGE RATE:		$647,874.75

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Recoveries Carried Forward		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
10/2003 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$218,899.00

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$13,492,983.44

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
10/2003 DISTRIBUTION REPORT
SERIES: WAMU 02AR17
WEIGHTED AVERAGE PC RATE: 2.68891%
WEIGHTED AVERAGE MATURITY: 375.14950
WEIGHTED AVERAGE LOAN AGE: 13.39642
POOL NUMBER: ALL
ISSUE DATE: 10/24/2002
CERTIFICATE BALANCE AT ISSUE: $1,141,838,488.95
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	1978		$984,282,144.11
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$1,594,697.95
Unscheduled Principal Collection/Reversals		$920,051.07
Liquidations-in-full	98	$50,623,756.51
Subsequent Recoveries		$0.00
Net principal Distributed		$53,138,505.53	-$53,138,505.53

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	1880		$931,143,638.58

SCHEDULED INTEREST AT MORTGAGE RATE:		$3,306,481.22

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Recoveries Carried Forward		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
10/2003 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$1,100,943.17

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$55,344,043.58

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.02AR17
Distribution Date: 10/27/2003

Distribution by Group
Pool ID		Principal		Interest		Total
Pool - 1956		$40,074,497.84		$1,776,562.30		$41,851,060.14
Pool - 1957		$13,064,007.69		$428,975.75		$13,492,983.44
Aggregate		$53,138,505.53		$2,205,538.05		$55,344,043.58

Number of Loans and Aggregate Principal Balance By Group
Pool ID	Beg Bal	Beg Count	Paid Off / Liq Count	Rem Count	Sched Prin End Bal	Sched Prin	Prin PrePay / Liq	Unsched Prin / Rev	Total Prin
Pool - 1956	$826,733,226.34	1649	71	1578	$786,658,728.50	$1,513,322.89	$37,716,869.64	$844,305.31	$40,074,497.84
Pool - 1957	$157,548,917.77	329	27	302	$144,484,910.08	$81,375.06	$12,906,886.87	$75,745.76	$13,064,007.69
Aggregate	$984,282,144.11	1978	98	1880	$931,143,638.58	$1,594,697.95	$50,623,756.51	$920,051.07	$53,138,505.53

Delinquency Information by Group
Pool ID	1 Month Count	Sched End Balance	2 Months Count	Sched End Balance	3 Months Count	Sched End Balance	4 Months Count	Sched End Balance
Pool - 1956	14	$6,487,166.37	2	$832,052.62	1	$675,145.60	2	$1,030,991.09
Pool - 1957	1	$319,304.69	0	$0.00	0	$0.00	0	$0.00
Aggregate	15	$6,806,471.06	2	$832,052.62	1	$675,145.60	2	$1,030,991.09

Foreclosure and REO Information by Group
Pool ID		Foreclosure Count		Sched End Balance		REO Count		Sched End Balance
Pool - 1956		0		$0.00		0		$0.00
Pool - 1957		0		$0.00		0		$0.00
Aggregate		0		$0.00		0		$0.00

Aggregate Loss Amounts by Group
Pool ID			Count			Loss Amount
Group 1(1956)			0			$0.00
Group 2(1957)			0			$0.00
Aggregate			0			$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.02AR17
Distribution Date: 10/27/2003

INSURANCE RESERVES - Group 1(1956)
Insurance Type	Original Balance	Claims In Progress	Claims Paid	Coverage Adjustments	Coverage Remaining
MPI	$0.00	$0.00	$0.00	$0.00	$0.00
Special Hazard	$9,541,717.00	$0.00	$0.00	$0.00	$9,541,717.00
Bankruptcy Bond
Single-Units	$194,565.00	$0.00	$0.00	$0.00	$194,565.00
Multi-Units	$0.00	$0.00	$0.00	$0.00	$0.00
Mortgage Repurchase	$28,625,152.00	$0.00	$0.00	$0.00	$28,625,152.00

INSURANCE RESERVES - Group 2(1957)
Insurance Type	Original Balance	Claims In Progress	Claims Paid	Coverage Adjustments	Coverage Remaining
MPI	$0.00	$0.00	$0.00	$0.00	$0.00
Special Hazard	$3,078,097.00	$0.00	$0.00	$0.00	$3,078,097.00
Bankruptcy Bond
Single-Units	$100,000.00	$0.00	$0.00	$0.00	$100,000.00
Multi-Units	$0.00	$0.00	$0.00	$0.00	$0.00
Mortgage Repurchase	$5,630,002.00	$0.00	$0.00	$0.00	$5,630,002.00

INSURANCE RESERVES - Aggregate
Insurance Type	Original Balance	Claims In Progress	Claims Paid	Coverage Adjustments	Coverage Remaining
MPI	$0.00	$0.00	$0.00	$0.00	$0.00
Special Hazard	$12,619,814.00	$0.00	$0.00	$0.00	$12,619,814.00
Bankruptcy Bond
Single-Units	$294,565.00	$0.00	$0.00	$0.00	$294,565.00
Multi-Units	$0.00	$0.00	$0.00	$0.00	$0.00
Mortgage Repurchase	$34,255,154.00	$0.00	$0.00	$0.00	$34,255,154.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.02AR17
Distribution Date: 10/27/2003

The Group I-B Certificates provide, to the limited extent described in the Prospectus Supplement, credit support, as well as special hazard, bankruptcy, and fraud coverage to certain Group I Certificates. The "Prospectus Supplement" is that certain Prospectus Supplement, dated October 22, 2002 to that certain Prospectus Supplement, dated September 19, 2002, to which certain certificates were offered. The special hazard, bankruptcy, and Fraud coverage (collectively, "Credit Enhancements") provided by the I-B certificates provide coverage to the Group I Loans, subject to the conditions and limitations to payment specified thereunder.



The Class Principal Balances of each Class of the Class IB1,IB2,IB3,IB4,IB5,IB6 Certificatesimmediately after the principal and interest distribution on 200310 are as follows:

Class			Class Principal Balance
IB1			$14,175,648.58
IB2			$7,087,824.28
IB3			$7,087,725.24
IB4			$6,142,853.68
IB5			$1,890,040.26
IB6			$3,780,221.99
Total			$40,164,314.04
Capitalized items used but not defined herein have the meanings ascribed to them in the Prospectus Supplement.
The amount of the special hazard coverage, bankruptcy coverage, and fraud coverage, as of the above referenced distribution date, is $9,541,717.00, $194,565.00, $28,625,152.00 respectively, and such coverages are referred to in the table above under the column "Insurance Type" as "special hazard," "bankruptcy bond," and "mortgage repurchase," respectively. However, no policy of insurance exists for any such coverage, notwithstanding the reference to "insurance."



The Group II-B Certificates provide, to the limited extent described in the Prospectus Supplement, credit support, as well as special hazard, bankruptcy, and fraud coverage to certain Group II Certificates. The "Prospectus Supplement" is that certain Prospectus Supplement, dated October 22, 2002 to that certain Prospectus Supplement, dated September 19, 2002, to which certain certificates were offered. The special hazard, bankruptcy, and Fraud coverage (collectively, "Credit Enhancements") provided by the II-B certificates provide coverage to the Group II Loans, subject to the conditions and limitations to payment specified thereunder.



The Class Principal Balances of each Class of the Class IIB1,IIB2,IIB3,IIB4,IIB5,IIB6 Certificatesimmediately after the principal and interest distribution on 200310 are as follows:

Class			Class Principal Balance
IIB1			$3,001,838.88
IIB2			$1,876,161.79
IIB3			$1,219,450.18
IIB4			$1,969,934.89
IIB5			$375,192.38
IIB6			$750,530.77
Total			$9,193,108.88
Capitalized items used but not defined herein have the meanings ascribed to them in the Prospectus Supplement.
The amount of the special hazard coverage, bankruptcy coverage, and fraud coverage, as of the above referenced distribution date, is $3,078,097.00, $100,000.00, $5,630,002.00 respectively, and such coverages are referred to in the table above under the column "Insurance Type" as "special hazard," "bankruptcy bond," and "mortgage repurchase," respectively. However, no policy of insurance exists for any such coverage, notwithstanding the reference to "insurance."

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.02AR17
Distribution Date: 10/27/2003

Aggregate ARM Information by Group
Pool ID	Netwac	Margin
Pool - 1956	2.57867%	1.20000%
Pool - 1957	3.26737%	1.25000%
Aggregate	2.68891%	1.20800%

WAMU MORTGAGE PASS THROUGH CERTIFICATES SERIES 2002-AR17 8-K