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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.

By type

By component

By trouble code

Bulletins, newest first
01-168-09R2021-02-01. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. The purpose of this bulletin is to provide replacement key and immobilizer information.
03-82-18R2020-09-04. Service bulletin. ENGINE AND ENGINE COOLING. This service information bulletin announces a design change to the clutch release bearing used on the models listed.
14-22-16R2020-09-04. Service bulletin. EQUIPMENT. Special Service Tools Cross Reference List.
01-181-202020-05-04. Service bulletin. EQUIPMENT. All Models (Vehicle Cleaning- COVID-19Best Practices)
TKA-20R2020-03-02. Service bulletin. AIR BAGS. SUBARU OF AMERICA, INC. has determined that a defect, which relates to motor vehicle safety, exists in certain 2003-2014 model year Legacy and Outback vehicles, 2003-2006 model year Baja vehicles, 2009-2013 model year Forester vehicles, 2004-2011 model year Impreza vehicles, and 2004-2014 WRX (including STI) vehicles equipped with a non-desiccated Takata-sourced passenger-side frontal air bag containing the propellant Phase Stabilized Ammonium Nitrate (PSAN).
TKA, TKB, TKC-202020-02-05. Service bulletin. AIR BAGS; EQUIPMENT ADAPTIVE/MOBILITY. SUBARU OF AMERICA, INC. has determined that a defect, which relates to motor vehicle safety, exists in certain 2003-2014 model year Legacy and Outback vehicles, 2003-2006 model year Baja vehicles, 2009-2013 model year Forester vehicles, 2004-2011 model year Impreza vehicles, and 2004- 2014 WRX (including STI) vehicles equipped with a non-desiccated Takata-sourced passenger-side frontal air bag containing the propellant Phase Stabilized Ammonium Nitrate (PSAN).
Subaru Announcem2020-02-05. Service bulletin. AIR BAGS; EQUIPMENT ADAPTIVE/MOBILITY. Takata Like for Like recalls- TKA20 (Zone A), TKB20 (Zone B), TKC20 (Zone C).
Subarunet Announ2019-10-31. Service bulletin. AIR BAGS. A special mailer was sent out today to owners of 2004-2005 model year Impreza (including WRX) vehicles with an open Takata airbag recall. The mailer, will include an incentive coupon good towards $100.00 worth of Genuine Subaru Accessories, Parts, or Service at the time they have their Takata airbag recall completed at any authorized Subaru Retailer. Offer will expire 1/2/2020.
06-68-19R2019-08-06. Service bulletin. SERVICE BRAKES, HYDRAULIC. This Service Information bulletin announces instruction for application of additional lubrication between the brake caliper support and pad clips. This will prevent the pad from dragging due to corrosion buildup which may result in uneven or premature wear of the replacement brake pads. This additional instruction applies to all models with brake pads using the upper and lower pad clips and has been added to the brake pad installation procedures found in the related Service Manuals.
Subaru Tech Tips2019-07-01. Service bulletin. EQUIPMENT. Subaru Service and Technical Support Line Newletter.
14-22-16R2019-07-01. Service bulletin. EQUIPMENT. To help reduce confusion and increase technician efficiency, Subaru of America, Inc. (SOA) has developed the following cross reference list to help locate the appropriate Special Service Tool.
04-13-09R2019-02-19. Service bulletin. STEERING; STEERING:ELECTRIC POWER ASSIST SYSTEM. This post was revised in error. It has been corrected back and removed from the posting list. The message was corrected on 04-13-14R posting dated 11/14/2018.
03-82-182018-12-10. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; POWER TRAIN. This Service Information bulletin announces a design change to the clutch release bearing used on the models as listed above. During assembly of the bearing, a different type of grease is used which has a higher resistance to heat. In cases where the operator keeps a foot on the clutch pedal for extended periods, an increased amount of heat is generated which can cause the grease inside the bearing to deteriorate. In a case of prolonged clutch pedal application, seizure of the bearing can occur with potential damage to other related components.
03-82-182018-12-10. Service bulletin. POWER TRAIN; EQUIPMENT ADAPTIVE/MOBILITY. This Service Information bulletin announces a design change to the clutch release bearing used on the models as listed above. During assembly of the bearing, a different type of grease is used which has a higher resistance to heat. In cases where the operator keeps a foot on the clutch pedal for extended periods, an increased amount of heat is generated which can cause the grease inside the bearing to deteriorate. In a case of prolonged clutch pedal application, seizure of the bearing can occur with potential damage to other related components.
WQR 53A 12018-06-11. Service bulletin. AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE. Owner Notification Subaru will begin mailing to affected vehicle owners on June 17, 2015. The first owners to receive notification will be owners identified based on registration data in areas of high absolute humidity (FL, HI, PR, GU, VI, AL, GA, MS, TX, LA). In addition to notification by postal mail, vehicle owners with a valid email address and MySubaru subscribers will be notified electronically. A copy of the owner notification letter will be added at the end of the WQR?53 campaign bulletin shortly. Retailer affected VIN Lists will be distributed by the Zone Offices. Retailers are requested to order parts to support scheduled customer service appointments.
WQR-53R2018-06-11. Service bulletin. AIR BAGS. Subaru of America, Inc. (Subaru) is expanding regional recall number WQP-51 (14V-763) on certain 2004-2005 model year Impreza (including WRX/STI) vehicles to a national recall. The subject vehicles are equipped with front air bag SPI-type inflators which are described in a Defect Information Report (NHTSA Recall number 15E-041) submitted by Takata on May 18, 2015. Upon deployment of the passenger side frontal air bag, the inflator may rupture due to exposure to persistent conditions of high absolute humidity and/or due to manufacturing variability.
04-13-09R2018-06-11. Service bulletin. EQUIPMENT; STEERING:HYDRAULIC POWER ASSIST:PUMP. 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.
WQR-53P2018-06-11. Service bulletin. AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE. WQR-53 Front Passenger Air Bag Inflator Parts Supply Update (Impreza, WRX, and STI models) We are pleased to announce that our parts supply for affected 2004-2005 model year Impreza, WRX, and STI vehicles has improved and we are preparing for the owner notification process.
WQR-532018-06-11. Service bulletin. AIR BAGS. 2nd Notification of WQR53 Recall to owners. The affected vehicles are equipped with a passenger side frontal air bag that may be susceptible to moisture intrusion which, over time, could cause the inflator to rupture upon its deployment.
01-168-09R2018-06-11. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Revised TSB. The Subaru Lock Information Site (SLIS) is located at http://lockinfo.subaru.com, and provides information on how to obtain immobilizer codes and key cut codes for Subaru vehicles from the 2000MY to present. This bulletin identifies the equipment required to initialize (reset) the immobilizer code and cut the key blanks, for both immobilizer and non-immobilizer type keys. Subaru of America began using immobilizer systems in some 2005MY vehicles (please refer to Immobilizer Chart for more detailed information).
02-172-18R2018-06-11. Service bulletin. ENGINE; EQUIPMENT. This bulletin provides details regarding a new oil filler tube o-ring developed to address engine oil seepage concerns. This seepage may accumulate along the bottom sealing surface of the rocker cover. The new o-ring utilizes material which has an increased resistance to engine heat.
WQR 53A2018-06-11. 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 G1recall, 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.
02-172-18R2018-06-11. Service bulletin. ENGINE. This bulletin provides details regarding a new oil filler tube o-ring developed to address engine oil seepage concerns. This seepage may accumulate along the bottom sealing surface of the rocker cover. The new o-ring utilizes material which has an increased resistance to engine heat.
01-168-09R2018-04-02. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. The purpose of this bulletin is to provide replacement key and immobilizer information along with an overview of the Subaru Lock Information web-site.
12-231-182018-03-13. Service bulletin. STRUCTURE:BODY. ( 2017-2018MY Impreza - 5 Dr Only)

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