Acura bulletin B25-038
What it saysDuring the manufacturing process of the rear electric drive module (eAxle), the mounting nut may have been improperly torqued or misaligned, potentially resulting in a loose or cross-threaded condition. NHTSA’s full summary ↓
Acura filed this with NHTSA as a service bulletin dated Jan 27, 2026, received Nov 4, 2025, about the power train — 3 documents under this number. It names 1 model year (2024). 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 communicationService Bulletin - During the manufacturing process of the rear electric drive module (eAxle), the mounting nut may have been improperly torqued or misaligned, potentially resulting in a loose or cross-threaded condition. This condition could lead to fluid leakage from the rear drive module, accompanied by a whine noise, possibly leading to a loss of driving force.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| B25-038 | Service bulletin | Jan 27, 2026 | 11028521 | PDF, 1,312 KB |
| B25-038 | Service bulletin | Nov 13, 2025 | 11026112 | PDF, 2,088 KB |
| B25-038 | Service bulletin | Oct 31, 2025 | 11024915 | PDF, 2,087 KB |
What the document itself lists
The manufacturer titles it “Product Update: 2024 ZDX Rear Electric Drive Module (eAxle)”.
Labour operations and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 1181HS | Replace Rear Electric Drive Module eAxle (includes alignment) | 4.6 hrs |
| 1181HR | Replace Rear Electric Drive Module eAxle with Air Suspension (includes alignment) | 6.8 hrs |
Read by machine from the document NHTSA serves (13 pages), read Oct 4, 2026. A part number is shown only where it matches Acura’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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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 62 complaints with NHTSA since 2015. 3 of them name Power Train — 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.
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 power train
Source: same model, same component group1 other manufacturer communication filed against the Acura ZDX under the same component group (power train), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| ONL6WY01302026 | Other | Jan 31, 2026 | Owner Notification Letter - During the manufacturing process of the rear electric drive module (eAxle), the mounting nut may have been impro… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Acura, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Acura B25-038 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 B25-038 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 Honda warranty extension on file lists the ones Honda has filed.
Which vehicles does B25-038 cover?
The manufacturer filed it against 1 model year: 2024 Acura ZDX. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.