2021 Subaru Impreza Technical Service Bulletins

323 technical service bulletins (TSBs) are on record for the 2021 Subaru Impreza. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11014875Feb 24, 2025Fuel system. This bulletin announces the design change made to the high-pressure fuel pump developed to prevent DTC P0087 (Fuel Rail/System Pressure – Too Low Bank 1).
• 11014870Feb 18, 2025Electrical system. In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited Warranty coverage for the CP1 & Gen 3.1 Head Unit used in the listed models and model years to (8) eight years / 150,000 miles to cover certain qualifying repairs to the infotainment audio system.
• 11014865Feb 17, 2025Engine. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and combustion chambers).
• 11014852Feb 10, 2025Electrical system. "This Service Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16."
• 11013530Jan 31, 2025Other or unknown. This announcement is in regard to special service tool shipment will be shipped directly to the Subar retailers during February.
• 11013547Jan 29, 2025Electrical system. As part of Subaru's dedication to customer satisfaction, Subaru of America, Inc. (SOA) is announcing a Warranty Extension of the New Vehicle Limited Warranty coverage for the CP1 & Gen 3.1 Infotainment head units for the models listed.
• 11013535Jan 29, 2025Electrical system. This bulletin gives information on extended New Car Limited Warranty for CP1 and Gen 3.1 Head Units.
• 11013525Jan 28, 2025Electrical system. A head unit OTA will be available via cellular network for Mid and High Grade CP1.5 head units.
• 11013512Jan 17, 2025Electrical system, Fuel system. This bulletin announces the repair procedures to be followed when DTC P1449 (EVAP System Clog Detected) is detected by the Engine Control Module (ECM).
• 11013490Jan 6, 2025Electrical system, Fuel system. This bulletin the announces diagnostic procedures and availability of new Engine Control Module (ECM) reprogramming files to address DTC P2404 (Evap System Leak Detection Pump Sense Circuit Range/Performance) detection.
• 11012266Dec 19, 2024Fuel system. This bulletin announces the design change made to the high-pressure fuel pump developed to prevent DTC P0087 (Fuel Rail/System Pressure – Too Low Bank 1).
• 11012265Dec 19, 2024Fuel system, Engine. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and combustion chambers).
• 11012262Dec 19, 2024Engine, Electrical system. This bulletin the announces diagnostic procedures and availability of new Engine Control Module (ECM) reprogramming files to address DTC P2404 (Evap System Leak Detection Pump Sense Circuit Range/Performance) detection.
• 11012260Dec 13, 2024Exterior lighting, Electrical system. This bulletin is for information purposes only.The bulletin adresses design changes of the headlamps and rear combination lamps, where moisture and or condensation may develop on the inside of the lamp lenses.
• 11010925Nov 14, 2024Electrical system. This annocement is to inform dealers to the Gen 3.1 Head Unit OTA will be available via Wi-Fi. The update will take place in multiple batches with the first beginneing November 15th and the last being Decemeber 3rd. This update is for approximatelt 714,000 VINs.
• 11010919Nov 8, 2024Electrical system. 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.
• 11009701Oct 31, 2024Other or unknown. This bulletin details an important regulation issued by the National Highway Traffic Safety Administration (NHTSA) which impacts the way some vehicles with accessories are sold. This regulation applies to any automobile retailer installing accessories on a vehicle prior to its first sale.
• 11009685Oct 1, 2024Other or unknown. This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models.
• 11008283Sep 27, 2024Electrical system. This Service Information Bulletin announces the preferred practices to be used when handling vehicles equipped with Gen2 Telematics which are enrolled in the Subaru STARLINK® Security Plus Service featuring Stolen Vehicle Recovery Plus with Immobilizer.
• 11008282Sep 27, 2024Engine, Electrical system. This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models.
• 11008281Sep 26, 2024Engine. This Service Information Bulletin announces the diagnostic procedures to be followed when diagnosing engine oil leakage on FA and FB type engines.
• 11008280Sep 26, 2024Electrical system. This Service Information bulletin is being released as guidance for proper testing and charging of vehicle batteries.
• 11008279Sep 26, 2024Electrical system. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure.
• 11008276Sep 26, 2024Electrical system. The CP1.5 RCs OTA is available for all mid and high grade CP1.5 head units.
• 11008267Sep 17, 2024Engine. This bulletin announces availability of the NEW genuine Subaru engine oil filter.
• 11008259Sep 4, 2024Suspension. This bulletin outlines the judgment criteria to be used when inspecting front transverse link bushings to reduce unnecessary bushing replacement.
• 11008258Sep 3, 2024Engine, Electrical system. This bulletin announces the availability of new oxygen sensors developed to address Diagnostic Trouble Codes (DTCs) detected by the Engine Control Module.
• 11006942Aug 29, 2024Electrical system, Engine. This bulletin announces the availability of new reprogramming files for the Engine Control Module (ECM). These files address concerns of the starter motor not operating in low ambient temperatures (less than 0 Degrees Celsius/ 32 Degrees Fahrenheit).
• 11006940Aug 27, 2024Engine, Fuel system. This bulletin announces the design change made to the high-pressure fuel pump developed to prevent DTC P0087 (Fuel Rail/System Pressure – Too Low Bank 1).
• 11006932Aug 15, 2024Electrical system. This Service Information Bulletin announces important diagnostic information to utilize when the Data Communication Module (DCM) is being tested as a dark current/standby current source.
• 11006935Aug 5, 2024Electrical system. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure for 2025MY vehicles.
• 11006934Aug 5, 2024Engine, Electrical system. The purpose of this bulletin is to provide replacement key and immobilizer information along with an overview of the Subaru Lock Information web-site.
• 11006931Aug 5, 2024Electrical system. This Bulletin provides additional diagnostics to follow when addressing a Telematics-related DTC B2A16.
• 11006930Aug 1, 2024Electrical system. This bulletin provides information on a new reprogramming procedure (FOTA) to optimize the Harman Gen 3.1 Audio and Navigation head units (H/U) utilized in the models as listed.
• 11005624Jul 24, 2024Transmission and drivetrain. This annoucement provides parts personnel information about remanufactured transmissions that will no longer be available.
• 11005617Jul 18, 2024Fuel system, Engine. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and combustion chambers).
• 11005615Jul 18, 2024Electrical system. This announcement provides information for retailers to install the latest infotainment system software for Denso CP 1.5.
• 11005614Jul 17, 2024Electrical system. This bulletin announces important diagnostic information to utilize when testing the Data Communication Module (DCM) as a dark current/standby current source. All models equipped with Telematics except Solterra.
• 11005609Jul 15, 2024Electrical system, Air bags. This announcement provides information on Takata Recall Escalated Towing Program.
• 11005608Jul 11, 2024Engine. This thermo control valve video contains information on the replacement of thermo control valve.
• 11005605Jul 9, 2024Electrical system. This bulletin 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.
• 11005599Jul 9, 2024Other or unknown. This Bulletin provides SOA paint codes to help eliminate possible confusion for 2025 MY vehicles.
• 11005595Jul 8, 2024Other or unknown. This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models.
• 11005593Jul 8, 2024Suspension. This Bulletin provides guidance for diagnosing a leaking front or rear suspension strut.
• 11005592Jul 8, 2024Engine, Electrical system. "This bulletin announces availability of new reprograming files for the Engine Control Module (ECM) developed to remedy the following DTCs: P0016, P0017, P0018, P0019, P0087."
• 11002730Jun 28, 2024Electrical system. This information announces reprograming file availability for Gen 4.5 Denso CP1.5 Audio and Navigation systems. Inprovement for CarPlay concerns with hands-free calls when the receiving party is not able to hear the caller.
• 11002725Jun 25, 2024Brakes. This bulletin provides diagnosis and procedure information to be applied when diagnosing potential fluid leaks on front and rear brake calipers. This information has been developed to reduce unnecessary brake caliper replacement.
• 11002723Jun 24, 2024Electrical system. This bulletin announces the repair procedures when corrosion is encountered within the instrument panel wiring harness and the rear wiring harness connectors.
• 11000830May 14, 2024Electrical system, Engine. This bulletin announces the diagnostic procedures to be followed when encountering cases of the Remote Engine Start (RES) system being the only non-functioning feature with telematics.
• 11000828May 14, 2024Electrical system, Engine. This bulletin announces the availability of new oxygen sensors developed to address the following Diagnostic Trouble Codes (DTCs); P0137 (O2 Sensor Circuit Low Voltage Bank 1 Sensor 2, P0138 (O2 Sensor Circuit High Voltage Bank 1 Sensor 2) P0140 (O2 Sensor Circuit No Activity Detected Bank 1 Sensor 2), and P0141 (O2 Sensor Heater Circuit Bank 1 Sensor 2).

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