Subaru bulletin 03-93-24
What it saysThis bulletin announces the availability of reprogramming files developed to address cases of P0A1C29 (Drive Motor “B” Control Module Signal Invalid) and P0A1B29 (Drive Motor “A” Control Module Signal Invalid) detected… NHTSA’s full summary ↓
Subaru filed this with NHTSA as a service bulletin dated May 29, 2024, received Jun 4, 2024, about the electrical system — 2 documents under this number. It names 1 model year (2023). 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 announces the availability of reprogramming files developed to address cases of P0A1C29 (Drive Motor “B” Control Module Signal Invalid) and P0A1B29 (Drive Motor “A” Control Module Signal Invalid) detected by the Motor Generator Control Unit.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 03-93-24 | Service bulletin | May 29, 2024 | 11000840 | PDF, 965 KB |
| 03-93-24 | Service bulletin | May 29, 2024 | 11000813 | PDF, 965 KB |
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 1 model year this bulletin names have filed 42 complaints with NHTSA since 2015. 16 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.
I am writing to express my concern regarding a series of significant issues I’ve experienced with my vehicle, all occurring within a span of less than six months and well within the 3-year/36,000-mile warranty period.
2023 Subaru Solterra · Electrical System · filed with NHTSA May 7, 2025 · ODI 11659610
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 group45 other manufacturer communications filed against the Subaru Solterra 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 |
|---|---|---|---|
| 15-333-25R | 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… |
| 15-304-22R | 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… |
| WRG-26R | Service bulletin | Aug 20, 2026 | Subaru of America, Inc. (Subaru) has initiated a safety recall for certain 2026 model year Solterra vehicles to update the software of the b… |
| 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… |
| 19-04-26 | Service bulletin | Aug 14, 2026 | This Bulletin provided diagnostic procedure information to be followed when addressing Dark Current / Parasitic Draw concerns on Subaru EV v… |
| 15-309-23R | Service bulletin | Aug 13, 2026 | This Service Information Bulletin has been developed to outline the steps for gathering basic but essential information during diagnosis of… |
| 19-03-26 | Service bulletin | Aug 5, 2026 | This bulletin announces the availability of reprogramming files for the Plug-in Control Module and the High Level Communication Module. |
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 03-93-24 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 03-93-24 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 03-93-24 cover?
The manufacturer filed it against 1 model year: 2023 Subaru Solterra. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.