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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.

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Only bulletins with component: Equipment and accessories are shown. Show all

Bulletins, newest first
15-221-18R2019-07-01. Service bulletin. EQUIPMENT. 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.
15-235-18R2019-07-01. Service bulletin. EQUIPMENT. This bulletin announces availability of new audio system amplifiers to address the following operating concerns with the Harman Kardon Gen 3 infotainment system: Symptom 1: No audio output is heard but, the volume level displayed changes when turning the knob Symptom 2: Audio volume increases to maximum intermittently without turning the knob Symptom 3: A buzzing, screeching or crackling-type sound is heard coming through the speakers.
14-22-16R2019-07-01. Service bulletin. EQUIPMENT. To help reduce confusion and increase technician efficiency, Subaru of America, Inc. (SOA) has developed the following cross reference list to help locate the appropriate Special Service Tool.
15-236-18R2019-05-28. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM:SOFTWARE. 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. It is VERY IMPORTANT to read and understand this information completely to understand all changes from prior releases before proceeding.
15-228-18R2019-05-28. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; 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).
15-238-192019-05-28. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This Service Information bulletin is in response to a small number of customer concerns regarding the audio unit not being able to play certain types of audio Compact Discs (CDs). Harman Gen 3.0 head units which have previously received software updates (see claims history) and Gen 3.1 head units (used in 2019MY year vehicles) cannot play ?CD Extra? or ?Enhanced CD? -type audio CDs.
15-229-18R2019-05-28. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; 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.
02-163-16R2019-05-28. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Service Information bulletin provides new inspection and repair procedures for AVCS (Active Valve Control System) -related DTCs on the FA and FB engine equipped models listed above. The applicable Service Manuals will be revised with this new information in the near future.
11-190-19R2019-05-28. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE. This bulletin announces availability of ECM reprogramming files to optimize the ECM. This bulletin announces availability of ECM reprogramming files to optimize the ECM. The new files contain logic which will revise: (1) the ECM detection of DTC U0122; (2) the EGR flow rate to address a limited number of customer concerns about a slight hesitation felt while driving at highway speeds and using the cruise control.
16-120-192019-05-28. Service bulletin. EQUIPMENT:MECHANICAL; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. This bulletin provides a procedure to follow for addressing customer concerns of a shuddering condition or chattering -type sound heard or felt when making sharp turns. If an applicable vehicle presents with the condition as described, it is recommended to perform the transfer clutch break-in procedure as described.
02-178-18R2019-03-25. Service bulletin. EQUIPMENT. This Service Information bulletin announces a design change made to the rubber timing hole access plug to improve its retention and prevent water intrusion into the converter case.
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.
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.
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.
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.
15-220-18R2018-12-10. 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.
15-220-18R2018-12-10. 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.
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.

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