Subaru bulletin 15-236-18R
What it saysThe 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… NHTSA’s full summary ↓
Subaru filed this with NHTSA as a service bulletin dated Jul 10, 2025, received Mar 11, 2019, about the electrical system — 29 documents under this number. It names 34 model years (2019–2025). 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 communicationThe 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.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 15-236-18R | Service bulletin | Jul 10, 2025 | 11021256 | PDF, 2,371 KB |
| 15-236-18R | Service bulletin | Jun 10, 2025 | 11019934 | PDF, 2,372 KB |
| 15-236-18R | Service bulletin | Nov 8, 2024 | 11010919 | PDF, 2,421 KB |
| 15-236-18R | Service bulletin | Jul 9, 2024 | 11005605 | PDF, 2,096 KB |
| 15-236-18R | Service bulletin | Mar 26, 2024 | 10252541 | PDF, 2,097 KB |
| 15-236-18R | Service bulletin | Dec 8, 2023 | 10248193 | not found |
| 15-236-18R | Service bulletin | Oct 2, 2023 | 10244889 | PDF, 2,092 KB |
| 15-236-18R | Service bulletin | Jun 6, 2023 | 10238443 | PDF, 2,090 KB |
| 15-236-18R | Service bulletin | May 11, 2023 | 10237273 | PDF, 2,090 KB |
| 15-236-18R | Service bulletin | Feb 7, 2023 | 10232214 | PDF, 1,969 KB |
| 15-236-18R | Service bulletin | Nov 17, 2022 | 10226867 | not found |
| 15-236-18R | Service bulletin | Aug 12, 2022 | 10219477 | PDF, 4,868 KB |
| 15-236-18R | Service bulletin | Jun 27, 2022 | 10215427 | PDF, 4,865 KB |
| 15-236-18R | Service bulletin | May 17, 2022 | 10213187 | PDF, 4,865 KB |
| 15-236-18R | Service bulletin | Dec 6, 2021 | 10205913 | not found |
| 15-236-18R | Service bulletin | Sep 20, 2021 | 10201804 | PDF, 2,325 KB |
| 15-236-18R | Service bulletin | Jul 28, 2021 | 10199966 | PDF, 2,326 KB |
| 15-236-18R | Service bulletin | Jun 8, 2021 | 10198774 | PDF, 2,323 KB |
| 15-236-18R | Service bulletin | Feb 10, 2021 | 10188170 | PDF, 2,323 KB |
| 15-236-18R | Service bulletin | Jan 7, 2021 | 10186355 | PDF, 2,327 KB |
| 15-236-18R | Service bulletin | Dec 21, 2020 | 10185088 | not found |
| 15-236-18R | Service bulletin | Aug 31, 2020 | 10179423 | not found |
| 15-236-18R | Service bulletin | Jul 28, 2020 | 10177833 | not found |
| 15-236-18R | Service bulletin | Feb 19, 2020 | 10171932 | not found |
| 15-236-18R | Service bulletin | Dec 30, 2019 | 10169851 | not found |
| 15-236-18R | Service bulletin | Nov 8, 2019 | 10168600 | not found |
| 15-236-18R | Service bulletin | Aug 21, 2019 | 10164194 | PDF, 1,937 KB |
| 15-236-18R | Service bulletin | Mar 25, 2019 | 10160501 | not found |
| 15-236-18R | Service bulletin | Jan 7, 2019 | 10154205 | 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.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
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Model years it names
Source: as the manufacturer filed themAlso filed against model years this site has no page for: 2021 Subaru BRZ.
A 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 33 model years this bulletin names have filed 5,905 complaints with NHTSA since 2015. 1,384 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.
On the 2020 Subaru Outback, the 115 owners who gave an odometer reading for Electrical System reported it at a median of 5,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
The contact owns a 2019 Subaru Forester. While turning the vehicle, the entire electrical system shut off, including the power steering and emergency braking system. The contact was almost involved in a crash due to the failure. The contact pulled over, shut off the engine, and restarted the vehicle, but the electrical failures remained.
2019 Subaru Forester · Electrical System · filed with NHTSA Mar 25, 2019 · ODI 11191388
The contact owns a 2022 Subaru Ascent. The contact received notification of NHTSA Campaign Number: 22V907000 (Electrical System). The local dealer was contacted; however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair.
2022 Subaru Ascent · Electrical System · filed with NHTSA Feb 9, 2023 · ODI 11506378
While backing out of my garage, the radio unit froze making the backup screen inoperable. This is a brand new car with 200 miles on it. According to the dealer, they will have to replace the head unit. They were able to get the unit working, hopefully until the new head unit arrives, by physically disconnecting the car battery.
2019 Subaru Outback · Electrical System · filed with NHTSA Jun 6, 2019 · ODI 11218229
In depth: 2020 Subaru Ascent electrical problems → · 2019 Subaru Ascent electrical problems → · 2019 Subaru Crosstrek electrical problems → · 2020 Subaru Forester electrical problems →
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 group140 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 |
|---|---|---|---|
| 07-244-26 | Service bulletin | Sep 29, 2026 | This Bulletin provides a repair procedure for increased dark current and unintended battery discharge that occurs in a small number of uniqu… |
| 18-244-26 | Service bulletin | Sep 18, 2026 | "This Bulletin announces additional troubleshooting steps for the following DTCs: DTC C1956: RH Actuator Circuit DTC C1957: LH Actuator Circ… |
| 15-333-25R | Service bulletin | Sep 14, 2026 | This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure… |
| 15-331-25R | Service bulletin | Sep 14, 2026 | This Bulletin has been developed to outline the steps for gathering basic but essential information during diagnosis of Infotainment concern… |
| 15-322-25R | Service bulletin | Sep 14, 2026 | In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited Warranty coverage for the CP1 & Gen… |
| 15-304-22R | Service bulletin | Sep 14, 2026 | This Bulletin has been developed to outline the steps for gathering basic but essential information during diagnosis of Infotainment concern… |
| 12-269-25R | Service bulletin | Sep 10, 2026 | This bulletin announces the service procedures to be followed when encountering instances of water intrusion from the sunroof area. This is… |
| 12-258-25R | Service bulletin | Sep 4, 2026 | This bulletin provides additional examples, diagnostics tips and installation tips as helpful aids to be used when working with sunroof seal… |
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 15-236-18R 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 15-236-18R 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. Every Subaru warranty extension on file lists the ones Subaru has filed.
Which vehicles does 15-236-18R cover?
The manufacturer filed it against 34 model years: 2022 Subaru Ascent, 2021 Subaru Ascent, 2020 Subaru Ascent, 2019 Subaru Ascent, 2024 Subaru BRZ, 2023 Subaru BRZ and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.