2018 Subaru Impreza Technical Service Bulletins

528 technical service bulletins (TSBs) are on record for the 2018 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.

• 11000827May 14, 2024Engine. 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 half-throttle.
• 11000825May 14, 2024Engine. This bulletin provides a revised service procedure to follow when repairing minor coolant seepage identified to be coming from the air plug at the top of the radiator.
• 11000820May 14, 2024Fuel system, Electrical system, Engine. 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.
• 11000817May 13, 2024Transmission and drivetrain, Electrical system. This bulletin announces a design change to the CVT select lever (shifter) mechanism in response to isolated customer concerns of not being able to remove the key from the ignition switch when the vehicle is in Park.
• 11000812May 3, 2024Fuel system, Engine. 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).
• 10253987Apr 22, 2024Equipment, Electrical system. T16 Warranty Extension (15-317-24R) Frequently Asked Questions.
• 10253971Apr 12, 2024Equipment, Electrical system. In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the Data Communication Module (DCM) Warranty from 3 years (36 months) of 36,000 miles to 8 years (96 months) or 100,000 miles, whichever comes first.
• 10252554Mar 29, 2024Electrical system, Equipment. This bulletin announces repair procedures to be used when diagnosing dark current draw (parasitic draw) on vehicles equipped with Gen 1 Data Control Modules.
• 10252551Mar 29, 2024Electrical system, Equipment. This bulletin provides a repair procedure when diagnosing dark current draw on vehicles with GEN 1 Data Control Modules.
• 10252539Mar 26, 2024Equipment, Steering. This bulletin announces the design change made to the cowl panel. The change was made to address a small number of cases where the rubber sealing portion becomes separated.
• 10252448Mar 12, 2024Equipment, Electrical system. Subaru has extended the Data Communication Module (DCM) warranty from 3 years 36,000mi to 8 years or 100,000mi. In rare cases, customers may experience a dead battery as a result of the DCM continually trying to access the 3G network.
• 10251116Feb 28, 2024Equipment, Electrical system. This letter provides information regarding the warranty extension for the Telematics Data Communications Module (DCM).
• 10251114Feb 28, 2024Equipment, Electrical system. This announcement provides information in regard to the extension of the basic new car limited warranty for the Telematics Data Communication Module (DCM). This coverage will apply to the vehicles listed for vehicles sold or leased in the United States.
• 10251111Feb 27, 2024Equipment, Electrical system. Subaru of America, Inc. (Subaru) is extending the Data Communication Module (DCM) warranty from three years (36 months or 36K miles) to eight years (96 months or 100K miles), whichever comes first. This extension is in light of the rare cases of dead batteries experienced by customers.Â
• 10251108Feb 27, 2024Electrical system, Equipment. This bulletin provides procedures required for reprogramming the Data Communication Module (DCM) in Gen 1 Subaru vehicles due to sunsetting of the 3G network.
• 10249614Jan 22, 2024Fuel system. This bulletin announces design changes made to the fuel injector assembly in response to the DTCs listed.
• 10246109Nov 15, 2023Electrical system. This Service Information Bulletin announces the revised break-in procedure for the A/C compressor.
• 10246104Nov 13, 2023Electrical system, Equipment. The following information addresses reprogramming file availability and a software update installation procedure to provide optimization to the Harman Gen 3 Audio and Navigation head units utilized in the models as listed.
• 10246083Nov 7, 2023Engine cooling, Equipment. This Service Information Bulletin announces diagnostic service procedures to be followed when DTC P0420 (Catalyst System Efficiency Below Threshold Bank 1) is detected by the Engine Control Module (ECM).
• 10244906Oct 9, 2023Engine cooling, Equipment. This Service Information Bulletin announces diagnostic service procedures to be followed when DTC P0420 (Catalyst System Efficiency Below Threshold Bank 1) is detected by the Engine Control Module (ECM). If DTC P0420 is found to be stored in the ECM, follow the diagnostic procedures outlined below.
• 10243372Sep 11, 2023Forward collision avoidance, Electrical system, Equipment. This Bulletin announces additional information regarding error codes 1403- 1407 encountered when attempting an adjustment/calibration of the EyeSight® system after body repair procedures have been performed.
• 10241845Aug 31, 2023Equipment, Electrical system. This bulletin announces the repair procedures when corrosion is encountered within the instrument panel wiring harness and the rear wiring harness connectors.
• 10241826Aug 14, 2023Body and structure, Equipment. This bulletin announces a design change made to the cowl panel.
• 10241822Aug 14, 2023Transmission and drivetrain, Electrical system. This bulletin announces a design change to the CVT select lever (shifter) mechanism in response to isolated customer concerns of not being able to remove the key from the ignition switch when the vehicle is in Park.
• 10241801Aug 1, 2023Equipment, Electrical system, Latches, locks and linkages. The purpose of this bulletin is to provide replacement key and immobilizer information along with an overview of the Subaru Lock Information web-site.
• 10240113Jul 13, 2023Equipment, Electrical system. This Bulletin provides reference tables and photos to use for determining the infotainment head unit supplier and generation.
• 10240110Jul 11, 2023Equipment. This bulletin announces the recommended cleaning procedures to followed when encountering vehicles with long time exposure to pollen on painted surfaces on vehicles imported from Japan. This bulletin does not apply to SIA built vehicles.
• 10238470Jun 29, 2023Equipment, Electrical system. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize efficiency while addressing customer concerns.
• 10238465Jun 29, 2023Engine cooling. The purpose of this Bulletin is to provide procedures for the diagnosis and repair of oil seepage which may be coming from the timing chain cover, front camshaft cap, camshaft carrier and / or upper oil pan.
• 10238460Jun 28, 2023Electrical system. This bulletin announces repair procedures to be used when diagnosing dark current draw (parasitic draw) on vehicles equipped with Gen 1 Data Control Modules.
• 10238456Jun 28, 2023Transmission and drivetrain, Electrical system. 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.
• 10238455Jun 13, 2023Exterior lighting. Subaru of America, Inc. (Subaru) has initiated a safety recall for certain 2017-2019 model year Impreza vehicles, which may contain non-compliant headlamp assemblies.
• 10237291May 22, 2023Suspension. This bulletin provides a procedure to address customer concerns of surface rust accumulating in the top center retaining nut area of the front strut mounts.
• 10235289Apr 27, 2023Transmission and drivetrain. 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.
• 10235280Apr 5, 2023Latches, locks and linkages. This bulletin announces a design change made to the rear gate stay assemblies.
• 10233907Mar 23, 2023Equipment, Electrical system. This Bulletin provides reference tables and photos to use for determining the infotainment head unit supplier and generation.
• 10233906Mar 21, 2023Latches, locks and linkages, Equipment. This bulletin announces a design change made to the rear gate stay assemblies.
• 10233886Mar 15, 2023Equipment, Electrical system. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize efficiency while addressing customer concerns.
• 10232240Feb 28, 2023Transmission and drivetrain, Electrical system. This Service Information Bulletin provides an updated diagnostic flow along with an IMPORTANT caution to follow for certain CVT solenoid related DTCs as listed.
• 10231319Jan 24, 2023Electrical system, Engine cooling. This bulletin announces availability of new reprograming files for the Engine Control Module (ECM).
• 10231299Jan 12, 2023Transmission and drivetrain. 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.
• 10226897Nov 29, 2022Electrical system. This bulletin announces a design change made to the power window main switches used in the models listed.
• 10226904Nov 17, 2022Transmission and drivetrain. 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.
• 10226863Nov 17, 2022Electrical system, Equipment. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize efficiency while addressin customer concerns.
• 10225748Oct 7, 2022Equipment, Exterior lighting. UPDATE Safety Recall: WRG-22 Impreza Headlamp Non-Compliance.
• 10225744Oct 3, 2022Equipment, Electrical system. This bulletin is being released as guidance for proper testing and charging of vehicle batteries.
• 10225740Oct 3, 2022Suspension. This bulletin announces a design change made to the front stabilizer bushings.
• 10222367Sep 27, 2022Engine cooling. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components.
• 10222357Sep 26, 2022Equipment. The purpose of this bulletin is to provide a description of current changes to Service Manuals.
• 10219493Aug 23, 2022Equipment, Engine cooling, Electrical system. Subaru of America, Inc. (Subaru) is recalling certain 2017-2019 model year Impreza and 2018-2019 model year Crosstrek vehicles to check and, if necessary, update the ECM programming, and to replace all four ignition coils in each vehicle.

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