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Service bulletins for the 2021 Subaru Forester

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.

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

By type

By component

By trouble code

Bulletins, newest first
171713R2023-04-24. Service bulletin. UNKNOWN OR OTHER; AIR BAGS; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Event Data Recorder (EDR) Function of Airbag Module
037012R-12023-04-24. Service bulletin. FUEL SYSTEM, OTHER:KINETIC:HOUSING/CASE. Repair Procedure for High-Pitched Sound from Extension Housing Area Using Latest Generation Production Parts
037012R2023-04-24. Service bulletin. POWER TRAIN. 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.
0370122023-04-17. Service bulletin. ELECTRICAL SYSTEM. Repair Procedure for High-Pitched Sound from Extension Housing Area Using Latest Generation Production Parts
07-218-23R2023-04-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin announces availability of a new Genuine Subaru Alternative Replacement Battery introduced to satisfy current supply demands.
15-285-21R2023-04-06. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL:INFOTAINMENT; ELECTRICAL SYSTEM. This Bulletin provides reference tables and photos to use for determining the infotainment head unit supplier and generation.
15-240-19R2023-04-06. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize efficiency while addressing customer concerns.
1717132023-04-03. Service bulletin. AIR BAGS. Event Data Recorder (EDR) Function of Airbag Module
02140132023-03-20. Service bulletin. ENGINE AND ENGINE COOLING. Oil Filler Cap Gasket Coming Unseated
Announcements-22023-03-13. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION: OIL COOLER. Effective with all 2015 model year cars and forward, the oil change interval is changing to 6,000 miles or 6 months, whichever comes first.
WQE41-12023-03-13. Service bulletin. UNKNOWN OR OTHER; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Puddle Light Recall
0116809R2023-03-06. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. Replacement Key and Immobilizer Info
0213212R2023-03-06. Service bulletin. EQUIPMENT. Diagnosis and Repair for AVCS-Related DTCs
15-242-19R2023-03-02. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This Service Information bulletin has been developed for use as a quick reference tool to aid in diagnosing operational concerns of the Gen 2 Telematics system’s remote access features.
15-219-18R2023-03-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. When attempting to complete the STARLINK Telematics subscription process, an Error Code 202 and / or 204 may occur preventing the process from completing successfully.
15-257-19R2023-03-02. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This Service Information Bulletin provides insight in response to both customer and retailer feedback resulting from the use of OBD-II port connected devices.
07-218-232023-03-02. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This bulletin announces availability of a new Genuine Subaru Alternative Replacement Battery introduced to satisfy current supply demands.
15-236-18R2023-03-02. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. The following information addresses reprogramming file availability and a software update installation procedure to provide optimization to the new Harman Gen 3.1 Audio and Navigation head units utilized in the models as listed.
09-100-232023-02-06. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This bulletin announces availability of reprograming files for the Engine Control Module (ECM) to address rare cases of the engine surging/jolting when releasing the accelerator from halfthrottle.
16-132-20R2023-02-06. Service bulletin. POWER TRAIN. This Service Information Bulletin provides updated diagnostic procedures to follow and a brief questionnaire to complete when diagnosing an alleged Chain Slip condition on the TR580 and TR690 model CVT transmissions used in the models listed.
16-132-20R2022-12-02. Service bulletin. POWER TRAIN. This Bulletin provides updated diagnostic procedures to follow and a brief questionnaire to complete when diagnosing an alleged Chain Slip condition on the TR580 and TR690 model CVT transmissions used in the models listed.
03-89-22R2022-12-02. Service bulletin. EQUIPMENT; FORWARD COLLISION AVOIDANCE; ELECTRICAL SYSTEM; ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC). This bulletin announces the availability of new Vehicle Dynamics Control (VDC) reprogramming files. In rare cases the EyeSight® system may receive inaccurate brake line pressure data from the VDC causing DTC B280B (VDC Brake Fluid Pressure) to be set.
15-236-18R2022-12-02. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. The following information addresses reprogramming file availability and a software update installation procedure to provide optimization to the new Harman Gen 3.1 Audio and Navigation head units utilized in the models as listed.
15-240-19R2022-12-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize efficiency while addressin customer concerns.
10-100-21R2022-12-02. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin announces availability of a new variable displacement type A/C compressor designed to address a small number of customer concerns regarding an excessive sound heard when the system is OFF.

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