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Service bulletins for the 2004 Subaru Impreza

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

208 on file from NHTSA, as of 2026-10-19.

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Bulletins, newest first
SM02 - WQL-482017-02-21. Service bulletin. AIR BAGS. UPDATE: WQL]48 FRONT PASSENGER AIR BAG INFLATOR RECALL (NHTSA ID 14V]399)
SM01 - WQM-492017-02-21. Service bulletin. AIR BAGS. ANNOUNCEMENT OF NEW SUBARU RECALL CAMPAIGN: FRONT PASSENGER AIR BAG INFLATORS WQM-49
WQR-53A2017-02-16. Service bulletin. AIR BAGS. "UPDATE ] SUBARU RECALL CAMPAIGN: FRONT PASSENGER AIR BAG INFLATORS WQR]53 (IMPREZA MODELS) AS PREVIOUSLY ANNOUNCED, WE BEGAN MAILING TO AFFECTED VEHICLE OWNERS ON JUNE 17, 2015. THE FIRST OWNERS TO RECEIVE NOTIFICATION WERE OWNERS IDENTIFIED BASED ON REGISTRATION DATA IN AREAS OF HIGH ABSOLUTE HUMIDITY (FL, HI, PR, GU, VI, AL, GA, MS, TX, LA). ON JULY 24, 2015 LETTERS WILL BE MAILED TO ALL OTHER AFFECTED VEHICLES OWNERS. THE LETTER TO THOSE OWNERS WILL ADVISE THEM OF THIS RECALL, AND THAT WE ARE IN THE PROCESS OF OBTAINING SUFFICIENT PARTS SUPPLY. ONCE SUFFICIENT PARTS SUPPLY IS AVAILABLE, THOSE OWNERS WILL BE NOTIFIED AGAIN BY MAIL ADVISING THEM TO PROCEED WITH SCHEDULING AN APPOINTMENT. RETAILER AFFECTED VIN LISTS WILL BE DISTRIBUTED BY THE ZONE OFFICES. RETAILERS ARE REQUESTED TO ORDER PARTS TO SUPPORT SCHEDULED CUSTOMER SERVICE APPOINTMENTS ONLY. PARTS ORDERS WILL BE FILLED IN THE ORDER THAT THEY ARE RECEIVED, THROUGH NORMAL PARTS ORDERING CHANNELS. IF A CUSTOMER REQUESTS A LOANER CAR DUE TO THE INSUFFICIENT SUPPLY OF PARTS, RETAILERS SHOULD MAKE EVERY EFFORT TO COMPLY WITH THIS REQUEST, AND SHOULD FOLLOW NORMAL WARRANTY PROCEDURES TO OBTAIN REIMBURSEMENT FOR THE LOANER CAR. SEE SECTION 8.4.7 OF THE CLAIMS POLICIES AND PROCEDURES MANUAL ON SUBARUNET.COM FOR DETAILS ON RENTAL AUTHORIZATIONS. "
04-13-09R2017-02-16. Service bulletin. EQUIPMENT:RECREATIONAL VEHICLE/TRAILER:LPG SYSTEMS:TANK VALVE/GAUGE. IF YOU ENCOUNTER A VEHICLE THAT HAS A GROANING TYPE NOISE COMING FROM THE POWER STEERING PUMP WHEN THE WHEEL IS TURNED TO THE FULL RIGHT OR LEFT POSITION WHEN THE VEHICLE IS PARKED, IT MAY BE CAUSED BY THE RELIEF VALVE VIBRATING WITHIN THE PUMP. IN LIEU OF REPLACING THE POWER STEERING PUMP, THE RELIEF VALVE IS NOW AVAILABLE AS A REPLACEMENT PART.
WQL-482017-02-15. Service bulletin. AIR BAGS. NEW SUBARU RECALL CAMPAIGN: FRONT PASSENGER AIR BAG INFLATORS WQL]48
WQR-53R2017-02-03. Service bulletin. AIR BAGS. "AS PREVIOUSLY ANNOUNCED, SUBARU WILL BE CONDUCTING A RECALL OF CERTAIN 2004]2005MY SUBARU IMPREZA (INCLUDING WRX/STI) VEHICLES. THE AIR BAG INFLATORS IN THE FRONT PASSENGER AIR BAGS FOR THESE VEHICLES COULD BE SUSCEPTIBLE TO RUPTURE AND THE FRONT PASSENGER AIR BAG COULD DEPLOY ABNORMALLY IN A CRASH. WQR-53 IS A GEOGRAPHIC EXPANSION OF THE CURRENT WQP]51 LIMITED REGIONAL RECALL, TO A NATIONAL RECALL FOR IMPREZA MODELS ONLY. DETAILS OF THE TRANSITION FROM WQP]51 TO WQR]53 FOR THE IMPREZA MODELS ARE LISTED BELOW."
WQR-53A2017-02-03. Service bulletin. AIR BAGS. THIS IS A GEOGRAPHIC EXPANSION OF THE CURRENT WQP-51 LIMITED REGIONAL RECALL, TO A NATIONAL RECALL FOR IMPREZA MODELS ONLY. DETAILS OF THE TRANSITION FROM WQP-51 TO WQR-53 FOR THE IMPREZA MODELS WILL BE PROVIDED IN FUTURE COMMUNICATIONS. SUBARU WILL BE CONDUCTING A RECALL OF CERTAIN 2004-2005MY SUBARU IMPREZA (INCLUDING WRX/STI) VEHICLES. THE AIR BAG INFLATORS IN THE FRONT PASSENGER AIR BAGS FOR THESE VEHICLES COULD BE SUSCEPTIBLE TO RUPTURE AND THE FRONT PASSENGER AIR BAG COULD DEPLOY ABNORMALLY IN A CRASH.
03-70-12R2017-01-31. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. REPAIR PROCEDURE FOR HIGH-PITCHED SOUND FROM EXTENSION HOUSING AREA USING LATEST GENERATION PRODUCTION PARTS - THIS BULLETIN PROVIDES PRODUCTION CHANGE, REPAIR PROCEDURE AND PARTS INFORMATION TO ADDRESS A CUSTOMER CONCERN OF A HIGH-PITCHED SOUND COMING FROM THE TRANSMISSION EXTENSION HOUSING AREA.
WQR-53R2016-11-16. Service bulletin. AIR BAGS. "THE VEHICLES INCLUDED IN THIS CONSOLIDATED NATIONAL RECALL INCLUDE THE FOLLOWING: • AFFECTED 2004-2005 IMPREZA, WRX, AND STI MODELS FROM THE NATIONAL EXPANSION OF THE WQP-51 RECALL • 2003-2004 LEGACY, OUTBACK, AND BAJA VEHICLES AFFECTED BY AND NOT YET REPAIRED UNDER THE WQL-48 RECALL • 2004 IMPREZA, WRX, AND STI VEHICLES AFFECTED BY AND NOT YET REPAIRED UNDER THE WQL-48 RECALL • 2005-2008 LEGACY AND OUTBACK VEHICLES, INCLUDING THE 2005 MODELS NOT YET REPAIRED UNDER THE WQP-51 RECALL IN THE EVENT OF A CRASH NECESSITATING DEPLOYMENT OF THE PASSENGER SIDE FRONTAL AIR BAG, THE FRONT PASSENGER-SIDE AIR BAG INFLATOR IN THESE VEHICLES COULD RUPTURE WITH METAL FRAGMENTS STRIKING THE VEHICLE OCCUPANTS POTENTIALLY RESULTING IN SERIOUS INJURY OR DEATH. ALTHOUGH THE PERCENTAGE OF AFFECTED VEHICLES IS UNKNOWN, THIS RECALL WILL INVOLVE REPLACING THE FRONT PASSENGER AIR BAG INFLATOR ON ALL OF THE POTENTIALLY AFFECTED VEHICLES."
WQR]53U2016-09-28. Service bulletin. AIR BAGS; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. THE WQR-53 RECALL IS BEING EXPANDED TO INCLUDE ALL 2005-2008 MODEL YEAR LEGACY AND OUTBACK VEHICLES. THIS IS AN EXPANSION FROM THE CURRENT WQP-51 LIMITED REGIONAL RECALL FOR CERTAIN 2005 MODEL YEAR LEGACY AND OUTBACK VEHICLES, TO A NATIONAL RECALL FOR ALL 2005-2008 MODEL YEAR LEGACY AND OUTBACK VEHICLES. THE WQR-53 PRODUCT CAMPAIGN BULLETIN HAS BEEN UPDATED ON STIS TO REFLECT THIS EXPANSION.
WQM-49R2016-09-23. Service bulletin. AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE. THE REVISEMENT OF THIS RECALL ADVISES (WQM-49) HAS BEEN SUPERSEDED TO THE WQP-51 REGIONAL FRONT PASSENGER TAKATA AIR BAG INFLATOR RECALL.
WQP-512016-09-23. Service bulletin. AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE. THIS BULLETIN ANNOUNCES SUBARU IS CONDUCTING THIS LIMITED REGIONAL RECALL TO REPLACE THE FRONT PASSENGER AIR BAG INFLATORS PRODUCED BY TK HOLDINGS, INC. (TAKATA) IN CERTAIN 2003-2005 MODEL YEAR LEGACY, OUTBACK, AND BAJA VEHICLES AND CERTAIN 2004-2005 MODEL YEAR IMPREZA (INCLUDING WRX/STI) VEHICLES CURRENTLY OR PREVIOUSLY REGISTERED IN THE FOLLOWING AREAS OF HIGH ABSOLUTE HUMIDITY.
WQP-51RA2016-09-23. Service bulletin. AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE. THIS ANNOUNCEMENT PROVIDES A GEOGRAPHIC EXPANSION OF THE CURRENT WQM]49 TAKATA AIRBAG LIMITED REGIONAL RECALL.
03-70-12R2016-09-14. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. THIS BULLETIN PROVIDES PRODUCTION CHANGE, REPAIR PROCEDURE AND PARTS INFORMATION TO ADDRESS A CUSTOMER CONCERN OF A HIGH-PITCHED SOUND COMING FROM THE TRANSMISSION EXTENSION HOUSING AREA. IN COLD TEMPERATURES, THERMAL CONTRACTION CAUSES SHRINKING OF THE TRANSMISSION CASE. IN HIGH TEMPERATURES, EXPANSION OF THE CASE OCCURS. THESE TEMPERATURE CHANGES AFFECT THE AMOUNT OF PRELOAD ON THE TRANSFER DRIVEN SHAFT BEARINGS. IN SOME RARE CASES, WHEN PRELOAD IS VERY NEAR THE LIMIT OF SPECIFICATION COMBINED WITH UNUSUAL DRIVING CONDITIONS, THIS THERMALLY-INDUCED PRE-LOAD CHANGE MAY CAUSE DAMAGE TO THE BEARINGS AND RESULT IN THE SOUND HEARD BY THE CUSTOMER. A CHANGE HAS BEEN MADE TO THE EXTENSION CASE AND A NEW “DISH PLATE” ADDED. THE MACHINING DEPTH OF THE EXTENSION CASE HAS BEEN INCREASED TO ACCOMMODATE THE NEW DISH PLATE. WHEN USED ALONG WITH A SELECTIVE THRUST WASHER, THE SPRING TENSION OF THE DISH PLATE HELPS TO MAINTAIN A CONSISTENT AMOUNT OF PRE-LOAD ON THESE BEARINGS THROUGHOUT VARYING TEMPERATURE CONDITIONS.
14411AA532R12016-07-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. SOA is pleased to announce the launch of a new remanufactured turbocharger program. Supplies are now available at all RDC’s. When installing a remanufactured turbocharger follow the procedure outlined in Service Bulletin 02-106-08R and consult the service manual for vehicle specific instructions.
14V-3992016-06-02. Service bulletin. AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
WQM-492016-06-02. Service bulletin. AIR BAGS. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
14V-4712016-06-02. Service bulletin. AIR BAGS. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
WQL-48R2016-05-23. Service bulletin. AIR BAGS. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
WQL-48R2016-05-23. Service bulletin. AIR BAGS. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
WQL-482016-05-23. Service bulletin. AIR BAGS. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
14V]3992016-05-23. Service bulletin. AIR BAGS. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
07-13-142016-05-23. Service bulletin. AIR BAGS. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
SB-05-50-10R2011-06-08. Service bulletin. TIRES. SUBARU: THERE IS A STEERING WHEEL VIBRATION AT HIGHWAY SPEEDS DUE TO AN IMPORPER WHEEL BALANCE. *RM
022006-03-10. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS. RUBBING MARK ON TIMING BELT. SUBARU. *TT

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.