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Service bulletins for the 2019 Subaru Ascent

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.

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

By type

By component

By trouble code

By topic

Bulletins, newest first
12-258-192019-03-25. Service bulletin. EQUIPMENT; EXTERIOR LIGHTING:TAIL LIGHTS. This bulletin announces a service procedure requirement to follow whenever removing the rear tail lamp access covers. The change involves the two retaining clips which are now ONE-TIME USE items and MUST always be replaced before reinstalling the covers.
12-255-18R2019-03-11. Service bulletin. STRUCTURE; STRUCTURE:BODY:DOOR. This bulletin outlines a design change made to the inner frame assembly used with the silver (?chrome?) type outer door handle to improve its reliability.
17-17-13R2019-03-11. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; AIR BAGS. This Bulletin provides information regarding Event Data Recorder (EDR) functionality which has been incorporated into the airbag system.
15-236-18R2019-03-11. Service bulletin. ELECTRICAL 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 above. The procedure will involve either downloading the software update files from Subarunet (or using those sent directly from Nuspire) and transferring them onto a flash drive for head unit installation.
01-178-182019-02-25. Service bulletin. EQUIPMENT. This Service Information bulletin announces a procedure change regarding installation of the body plugs used to close the tie-down chain access holes in the vehicle underbody. Previously, these body plugs were placed in the glove box during vehicle assembly and installed by Retailers as part of the Pre-Delivery Inspection (PDI) procedure. Recently, the use of ?soft? tie-down straps for vehicle securement during transport has replaced the tie-down chains (no longer a SOA-accepted securement method) used previously. For this reason, the access hole body plugs are now installed during vehicle assembly.
11-183-18R2019-02-25. Service bulletin. ELECTRICAL SYSTEM. This bulletin announces reprogramming file availability to optimize the ECM. These new files involve the ECM?s diagnosis of DTC P0045:
12-255-182019-02-25. Service bulletin. STRUCTURE:BODY:DOOR; STRUCTURE. This bulletin outlines a design change made to the inner frame assembly used with the silver (?chrome?) type outer door handle to improve its reliability.
12-254-182019-02-19. Service bulletin. STRUCTURE. This bulletin provides helpful tips to follow when addressing a customer concern of the ?A? pillar trim coming loose.
07-143-18R2019-02-19. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin announces a change made to the PRG control module. This change is in response to a limited number of customer concerns regarding the PRG reversing direction before reaching the fully open position. The control module senses that an object is caught in the PRG and engages the system?s reverse (safety) function. The new PRG control modules contain improved operating logic to correct this condition.
15-219-18R2018-12-10. Service bulletin. 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. These codes both relate to the multi-stage CommCheck process which introduces the Data Communications Module (DCM) to the AT&T cellular network the Telematics system operates on. The Telematics Service Provider (TSP) cannot communicate with the vehicle (DCM) until the CommCheck completes successfully.
15-220-18R2018-12-10. Service bulletin. EQUIPMENT:ELECTRICAL. 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.
15-234-182018-12-10. Service bulletin. EQUIPMENT. 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.
12-252-182018-12-10. Service bulletin. STRUCTURE:FRAME AND MEMBERS; EQUIPMENT ADAPTIVE/MOBILITY; STRUCTURE:BODY. This Service Information bulletin announces a procedure change for installation of the under-body grommets used to seal the tie-down holes used during vehicle transport. Previously, the grommetswere supplied with the vehicle and placed in the glove box to be installed as part of the pre-delivery inspection (PDI) procedure. Recently, all carriers transporting vehicles from SIA began using individual wheel tie-downs instead of the chain-type tie-downs. As a result, these under-body grommets are now installed during vehicle assembly.
15-219-18R2018-12-10. Service bulletin. 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. These codes both relate to the multi-stage CommCheck process which introduces the Data Communications Module (DCM) to the AT&T cellular network the Telematics system operates on. The Telematics Service Provider (TSP) cannot communicate with the vehicle (DCM) until the CommCheck completes successfully.
15-220-18R2018-12-10. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM:SOFTWARE. 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.
15-234-182018-12-10. Service bulletin. EQUIPMENT. 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.
12-252-182018-12-10. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; STRUCTURE:FRAME AND MEMBERS. This Service Information bulletin announces a procedure change for installation of the under-body grommets used to seal the tie-down holes used during vehicle transport. Previously, the grommetswere supplied with the vehicle and placed in the glove box to be installed as part of the pre-delivery inspection (PDI) procedure. Recently, all carriers transporting vehicles from SIA began using individual wheel tie-downs instead of the chain-type tie-downs. As a result, these under-body grommets are now installed during vehicle assembly.
11-183-18R2018-11-05. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. This bulletin announces reprogramming file availability to optimize the ECM. These new files involve the ECM?s diagnosis of DTC P0045: TURBOCHARGER / SUPERCHARGER BOOST CONTROL ?A? CIRCUIT OPEN and DTC P2196: A/F O2 SENSOR SIGNAL BIASED / STUCK RICH BANK 1 SENSOR 1. For P0045, in some cases, an engine RPM drop may occur when selecting D or R range too quickly following ignition on and before the engine reaches full operation during the ECM?s initial control of the waste gate valve. Should this occur P0045 may set the next time the engine is started. For P2196, if the driver "snaps" the throttle open and shut rapidly, normal judgement of the A/F sensor data may be inaccurate and cause the code to be detected in error.
04-22-182018-11-05. Service bulletin. STEERING; STEERING:ELECTRIC POWER ASSIST SYSTEM. This bulletin announces availability of a new electric power steering (EPS) rack assembly. The new EPS assembly addresses a limited number of customer concerns involving a rattling-type sound from the steering which may be heard when driving on rough roads.
15-220-18R2018-11-05. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; EQUIPMENT:ELECTRICAL. 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.
15-231-18R2018-11-05. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL. 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 questionflow based on the customer concern. Answer each related question noting the results to each in detail while performing the diagnostics. Review the entire bulletin before beginning to understand the flow for the listed concerns. If the concern you have is not listed, check the Service Manual: Infotainment (Diagnostics) > Diagnostics with Phenomena section as a starting point.
15-230-18R2018-11-05. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT ADAPTIVE/MOBILITY; 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 the customer concern. Answer each related question noting the results to each in detail while performing the diagnostics. Review the entire bulletin before beginning in order to understand the flow for the listed concern. If the concern you have is not listed, check the Service Manual ?Infotainment (Diagnostics) - Diagnostics with Phenomena? section as a starting point.
15-229-18R2018-11-05. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. 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. Answer each related question noting the results to each in detail while performing the diagnostics. Review the entire bulletin before beginning in order to understand the flow for the listed concern. If the concern you have is not listed, check the Service Manual ?Infotainment (Diagnostics) - Diagnostics with Phenomena? section as a starting point.
15-228-18R2018-11-05. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. This bulletin provides troubleshooting steps to follow when diagnosing a customer concern of the display screen being either frozen (unresponsive) or black (blank). 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. Answer each related question noting the results to each in detail while performing the diagnostics. Review the entire bulletin before beginning in order to understand the flow for the listed concern. If the concern you have is not listed, check the Service Manual ?Infotainment (Diagnostics) > Diagnostics with Phenomena? section as a starting point.
15-227-18R2018-11-05. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM); EQUIPMENT. 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 on the customer concern. Answer each related question noting the results to each in detail while performing the diagnostics. Review the entire bulletin before beginning in order to understand the flow for the listed concern. If the customer?s concern is not listed, check the Service Manual ?Infotainment (Diagnostics) - Diagnostics with Phenomena? section as a starting point.

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