Subaru bulletin 15-311-23R
What it saysThis bulletin provides instruction for use (FOTA) of a new reprogramming procedure to optimize the Denso Gen 4.5 Audio and Navigation system utilized in the models listed. NHTSA’s full summary ↓
Subaru filed this with NHTSA as a service bulletin dated Jul 15, 2026, received Jan 3, 2024, about the electrical system — 5 documents under this number. It names 23 model years (2023–2026). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis bulletin provides instruction for use (FOTA) of a new reprogramming procedure to optimize the Denso Gen 4.5 Audio and Navigation system utilized in the models listed. (This is an revised version of the original bulletin).
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 15-311-23R | Service bulletin | Jul 15, 2026 | 11035631 | PDF, 5,402 KB |
| 15-311-23R | Service bulletin | Oct 9, 2025 | 11024847 | PDF, 5,345 KB |
| 15-311-23R | Service bulletin | Nov 7, 2024 | 11010908 | PDF, 1,168 KB |
| 15-311-23R | Service bulletin | Apr 12, 2024 | 10253962 | PDF, 2,917 KB |
| 15-311-23R | Service bulletin | Dec 20, 2023 | 10248202 | not found |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 23 model years this bulletin names have filed 803 complaints with NHTSA since 2015. 87 of them name Electrical System — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
Warning light on infotainment screen for Eyesight and Transmission Oil issues. Warning from MySubaru System via website. Warning on Infotainment screen while using CarPlay "There was a problem loading this content." Contacted Subaru of America Britt Senior Customer Service Advocate telling them dealer is not making appointment to fix car…
2024 Subaru Legacy · Electrical System · filed with NHTSA Oct 11, 2024
I was driving normally, having started my car after leaving a store at the time, while backing up, I received an ad (depicted below) for the SiriusXM limited time offer. This advertisement completely blocked the entirety of the infotainment system, disabling the navigation components completely, disabling my ability to use the backup…
2025 Subaru WRX · Electrical System · filed with NHTSA Jun 4, 2026
The infotainment system and Apple CarPlay connectivity is posing a safety hazard. When I’m on a phone call my audio will randomly cut out and suddenly the person on the other side of the call can no longer hear me. In order to fix the issue I must pick up my phone while I’m driving to disconnect from Apple CarPlay and reconnect.
2024 Subaru Crosstrek · Electrical System · filed with NHTSA May 9, 2024
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the electrical system
Source: same model, same component group149 other manufacturer communications filed against these Subaru models under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Subaru list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 15-342-26 | Service bulletin | Aug 31, 2026 | This bulletin announces an inspection procedure for the Smart Rear View Mirror Assembly. |
| 15-261-20R | Service bulletin | Aug 31, 2026 | This bulletin announces reprogramming file availability and provides a software update installation procedure to optimize the new Gen 4 Dens… |
| 15-341-26 | Service bulletin | Aug 20, 2026 | This Bulletin provides best practices for troubleshooting and resolving Subaru Connect telematics concerns on 2026MY Solterra, Trailseeker… |
| 15-308-23R | Service bulletin | Aug 20, 2026 | This Service Information Bulletin outlines a systematic procedure for diagnosing parasitic draw (dark/standby current) in vehicles experienc… |
| 15-305-22R | Service bulletin | Aug 20, 2026 | This bulletin announces a reprogramming file availability and provides a software update installation procedure to optimize the new Gen 4.5… |
| 15-331-25R | Service bulletin | Aug 14, 2026 | This Bulletin has been developed to outline the steps for gathering basic but essential information during diagnosis of Infotainment concern… |
| 15-304-22R | Service bulletin | Aug 13, 2026 | This Bulletin has been developed to outline the steps for gathering basic but essential information during diagnosis of Infotainment concern… |
| 10-106-26 | Service bulletin | Aug 5, 2026 | This bulletin announces the design change made to the A/C control module and blower motor unit assembly. |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Subaru, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Subaru 15-311-23R a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the 15-311-23R repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does 15-311-23R cover?
The manufacturer filed it against 23 model years: 2026 Subaru Ascent, 2025 Subaru Ascent, 2024 Subaru Ascent, 2023 Subaru Ascent, 2026 Subaru Crosstrek, 2025 Subaru Crosstrek and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.