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.

• 10174540Apr 24, 2020Electrical system, Engine cooling. This bulletin announces the availability of reprogramming files to optimize the Engine Control Module (ECM).
• 10174538Apr 23, 2020Electrical system. In the intrest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited Warranty for the listed models and model years equipped with a Harman Gen. 3.0 Audio and Navigation head unit.
• 10173198Mar 31, 2020Fuel system. This bulletin provides a service procedure to address a small number of concerns regarding a rattle/ buzz-type sound coming from the fuel tank area.
• 10173195Mar 31, 2020Electrical system, Equipment. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize effciency while addressing customer concerns.
• 10173186Mar 26, 2020Electrical system, Equipment. This service bulletin provides details of a correction to the diagnostic procedure for DTC B2350- REAR RADAR COMMUNICATION ERROR on the models listed.
• 10173178Mar 24, 2020Body and structure, Equipment. This bulletin announces a design change made to the hood stay support. This change will prevent vibration sounds resulting from contact with adjacent under-hood components.
• 10173135Mar 20, 2020Latches, locks and linkages, Electrical system, Body and structure. This Service Information Bulletin provides insight on how to address a customer concern of the rear hatch, Power Rear Gate (PRG) or trunk release operating (or finding the PRG/trunk open unexpectedly after parking) without a specific input (button press) from the operator.
• 10173127Mar 19, 2020Electrical system, Air bags, Equipment. This bulletin provides information regarding Event Data Recorder (EDR) functionality which has been incorporated into the airbag system.
• 10173114Mar 6, 2020Electrical system. This Service Information Bulletin is in response to several battery sensor replacements resulting from improper removal and/or installation practices.
• 10173109Mar 4, 2020Body and structure, Equipment. This bulletin announces availability of new outer door handles to address isolated concerns of the chrome finish peeling.
• 10171925Feb 27, 2020Electrical system, Engine cooling. This bulletin announces the availability of reprogramming files to optimize the Engine Control Module (ECM).
• 10171950Feb 21, 2020Electrical system. This Service Information bulletin describes a change made to the labels applied to the push to start switches used on the models listed.
• 10171944Feb 21, 2020Equipment, Electrical system. This Service Information bulletin informs of an upcoming correction to the Service Manual involving Gear Position shown in Freeze-Frame Data acquired during Engine diagnosis.
• 10171928Feb 19, 2020Electrical system. 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.
• 10171923Feb 12, 2020Equipment, Electrical system. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure.
• 10171870Feb 5, 2020Brakes. In the interest of customer satisfaction, Subaru of America, Inc. (Subaru) is initiating a service program to replace brake hoses that may swell due to fluid which can squeeze in between the hose’s inner and outer layers.
• 10171104Jan 31, 2020Equipment, Engine cooling. This Service Information Bulletin announces part number change information for the Positive Crankcase Ventilation (PCV) valves used on the models listed above.
• 10171097Jan 29, 2020Electrical system. This Service Information Bulletin announces part number change information for the ignition coils used on the models listed.
• 10171094Jan 28, 2020Electrical system, Equipment. The first TomTom map update for Gen 3.0 Harman navigation equipped vehicles was made available.
• 10171093Jan 28, 2020Electrical system, Equipment. This bulletin provides a new reprogramming procedure (FOTA) to optimize the Harman Gen 3 Audio and Navigation head units (H/U) utilized in the models
• 10171089Jan 17, 2020Equipment, Electrical system, Air bags. This Bulletin provides information regarding Event Data Recorder (EDR) functionality which has been incorporated into the airbag system.
• 10171085Jan 14, 2020Brakes, Equipment. Part Supply update for part numbers 26592FL010 and 26592FL000.
• 10171082Jan 10, 2020Electrical system. This announcement is in regards to the class action lawsuit regarding Harman Gen 3.0 Audio and Audio/ Navigation Head Units in certain Subaru vehicles.
• 10171081Jan 10, 2020Equipment, Brakes. In the interest of customer satisfaction, Subaru of America, Inc. (Subaru) is initiating a service program to replace brake hoses that may swell due to fluid which can squeeze in between the hose’s inner and outer layers.
• 10171079Jan 9, 2020Brakes, Equipment. Part Supply update for part number 26592FL010
• 10171073Jan 3, 2020Electrical 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.
• 10169853Dec 31, 2019Tires. "This bulletin announces availability of reprogramming files to optimize operation of the Tire Pressure Monitor System’s (TPMS) real-time display function. Under certain high-altitude conditions, the tire pressure values displayed in the combination meter may not be accurate. NOTE: The TPMS Real Time display is independent of the actual TPMS function. Should an actual low tire pressure condition occur, the TPMS…
• 10169845Dec 20, 2019Equipment. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure. The exchange program policy can also be found in Sections 8.4.9 and 11.2.10 of your Claims Policies and Procedures Manual found in Subarunet.
• 10169862Dec 5, 2019Engine cooling. Subaru of America, Inc. (Subaru) is initiating a new safety recall for certain 2017-2018 model year Impreza vehicles and certain 2018 model year Crosstrek vehicles in which the Positive Crankcase Ventilation (PCV) valve may be defective.
• 10169827Dec 2, 2019Electrical system, Engine cooling. Subaru of America, Inc. (Subaru) is recalling certain 2017-2019 model year Impreza and 2018-2019 Crosstrek vehicles due to improper Engine Control Module (ECM) programming. A total of 466,205 U.S. vehicles will be affected by this recall.
• 10168632Nov 21, 2019Equipment, Brakes. Owner notification schedule: WUR-03 Impreza & Crosstrek Brake Hose Swelling Customer Satisfaction Program.
• 10168631Nov 21, 2019Electrical system, Equipment. Owner notification schedule: WUQ-02 Impreza/Crosstrek ignition coil reprogramming recall.
• 10168635Nov 20, 2019Equipment, Brakes. In the interest of customer satisfaction, Subaru of America, Inc. (Subaru) is initiating a service program to replace brake hoses that may swell due to fluid which can squeeze in between the hose’s inner and outer layers.
• 10168571Nov 18, 2019Equipment, Electrical system. This bulletin provides troubleshooting steps to use when diagnosing specific and general audio/sound related concerns. Please start by completing the Harman Investigation Guide-Questionnaire as it gathers important details which will assist you with this diagnosis and is required should the condition not be resolved by this troubleshooting. Once the questionnaire is completed, follow the question flow based on the…
• 10168565Nov 18, 2019Equipment, Electrical system. This bulletin provides troubleshooting steps to follow when diagnosing customer concerns of the Navigation system’s functionality. Please start by completing the Harman Investigation Guide Questionnaire as it gathers important details which will help with diagnosis and will be required should the condition not be resolved by this troubleshooting. While completing the questionnaire, follow the question flow based…
• 10168560Nov 18, 2019Equipment, Electrical system. This bulletin provides helpful information about operating conditions observed in the field for Technicians to use when diagnosing customer concerns which may arise while operating Harman Gen 3.0 and 3.1 Navigation and Display Audio systems. We will continue to add to this bulletin as more information becomes available.
• 10168627Nov 15, 2019Equipment, Electrical system. This bulletin provides troubleshooting steps to follow when diagnosing clock-related customer concerns. Please start by completing the Harman Investigation Guide Questionnaire as it gathers important details which will help with diagnosis and will be required should the condition not be resolved by this troubleshooting. While completing the questionnaire, follow the question flow based on the customer concern.
• 10168574Nov 15, 2019Equipment, Electrical system. This Service Information bulletin provides a procedure to use for addressing a customer concern of a delayed or slow response when using the soft keys on the touch screen of the audio / navigation head unit.
• 10168573Nov 15, 2019Electrical system, Equipment. This bulletin provides troubleshooting steps to use when diagnosing concerns of the Apple CarPlay and / or Android Auto feature not connecting or launching properly when a compatible device is connected to the head unit.
• 10168569Nov 15, 2019Electrical system, Equipment. This bulletin provides troubleshooting steps to follow when diagnosing customer concerns involving Bluetooth (BT) functionality. Please start by completing the Harman Investigation Guide Questionnaire as it gathers important details which will help with diagnosis and will be required should the condition not be resolved by this troubleshooting. While completing the questionnaire, follow the question flow based on…
• 10168563Nov 15, 2019Equipment, Electrical system. This bulletin provides troubleshooting steps to follow when diagnosing customer concerns regarding USB functionality. Please start by completing the Harman Investigation Guide Questionnaire as it gathers important details which will help with diagnosis and will be required should the condition not be resolved by this troubleshooting. While completing the questionnaire, follow the question flow based on the customer…
• 10168562Nov 15, 2019Equipment, Electrical system. This Service Information bulletin provides a procedure for customizing the maintenance period settings of the MFD. When accessing the Maintenance period information on the SSM4, the maintenance interval default values for mileage and number of months are different from those displayed on the MFD. This procedure describes how to synchronize the MFD and SSM4 values to insure proper customer notification.
• 10168558Nov 13, 2019Brakes. In the intrest of customer satisfaction, Subaru of America, Inc. (Subaru) is initiating a service program to replace brake hoses that may swell due to fluid which can squeeze in between the hose's inner and outer layers. The condition presents itself as a noticeable swelling of the hose rubber near the fittings. However, the change in appearance does not affect the performance of the braking system.
• 10168625Nov 11, 2019Engine cooling, Equipment. Subaru of America, Inc. (Subaru) is initiating a new safety recall for certain 2017-2018 model year Impreza vehicles and certain 2018 model year Crosstrek vehicles in which the Positive Crankcase Ventilation (PCV) valve may be defective.
• 10168606Nov 8, 2019Electrical system. On August 23rd, 2018, the first TomTom map update for Gen 3.0 Harman navigation equipped vehicles was made available. While the map update process is user-friendly, we ask that retailers assist customers with the map update procedure when requested as a courtesy, an opportunity to build retailer loyalty, enhance customer satisfaction and in keeping with the Love Promise.
• 10168592Nov 8, 2019Electrical system. In the interest of customer satisfaction, Subaru of America, Inc. (Subaru) is initiating a service program to update the Harman Kardon head unit on certain vehicles with the latest version of software.
• 10166956Oct 31, 2019Engine cooling. Subaru of America, Inc. (Subaru) is initiating a new safety recall for certain 2017-2018 model year Impreza vehicles and certain 2018 model year Crosstrek vehicles in which the Positive Crankcase Ventilation (PCV) valve may be defective.
• 10166932Oct 30, 2019Electrical system, Engine cooling. Subaru of America, Inc. (Subaru) is recalling certain 2017-2019 model year Impreza and 2018-2019 Crosstrek vehicles due to improper Engine Control Module (ECM) programming. A total of 466,205 U.S. vehicles will be affected by this recall.
• 10166943Oct 24, 2019Engine cooling. Subaru f America, Inc. (Subaru) is initiating a new safety recall for certain 2017-2018 model year Impreza vehicles and certain 2018 model year Crosstrek vehicles in which the Positive Crankcase Ventilation (PCV) valve may be defective.
• 10166939Oct 23, 2019Electrical system, Engine cooling. The remedy is now available for this recall. Please refer to the WUQ-02 Product campaign Bulletin on STIS.

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