Volvo bulletin 37504
What it saysThis is a TJ Text Only no attachment If a customer experiences a DIM message stating "Propulsion Service Required" and IEM P0A7A48 is stored, please follow the advice under "Service". NHTSA’s full summary ↓
Volvo filed this with NHTSA as a service bulletin dated Dec 20, 2025, received Oct 2, 2025, about the power train — 2 documents under this number. It names 5 model years (2021–2023). 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 is a TJ Text Only no attachment If a customer experiences a DIM message stating "Propulsion Service Required" and IEM P0A7A48 is stored, please follow the advice under "Service".
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 37504 | Service bulletin | Dec 20, 2025 | 11027192 | |
| 37504 | Service bulletin | Sep 22, 2025 | 11023543 |
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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A weekly email, sent only in a week when Volvo files something new with NHTSA for the model you pick — service bulletins, campaigns, warranty extensions, over-the-air notices, every model year. Nothing else is sent; one-click unsubscribe in every message. Separate from recall alerts.
What owners reported
Source: NHTSA complaint databaseOwners of the 5 model years this bulletin names have filed 177 complaints with NHTSA since 2015. 4 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.
The vehicle is a battery electric that relies on its 12V battery to start and operate. My wife and I were driving the vehicle and began to stop in a let hand turn lane when it shuddered violently and stopped without any ability to move forward or in reverse - an emergency message appeared in the dash display indicating a 12V battery…
2021 Volvo XC40 · Power Train · filed with NHTSA Mar 11, 2023 · ODI 11511344
Under acceleration, there is a knocking/loud rattling sound from both front axles and constant velocity joints. I am a former master technician and this is clearly a serious issue with these axles as they cannot tolerate the huge torque output from the electric motor.
2023 Volvo C40 · Power Train · filed with NHTSA Apr 14, 2024 · ODI 11582875
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 group21 other manufacturer communications filed against these Volvo models under the same component group (power train), newest first. The eight newest are listed; the rest are on the Volvo list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 37504.3.0 | Service bulletin | Sep 19, 2026 | This is a TJ Text Only no attachment If a customer experiences a DIM message stating "Propulsion Service Required" and IEM P0A7A48 is stored… |
| 36774.4.0 | Service bulletin | Sep 17, 2026 | This is a Technical Journal: Text plus 1 PDF -- DTC TCM P277C07 set. If the TCM DTC listed below is set, A new transmission hardware solutio… |
| 36774.3.0 | Service bulletin | Jun 10, 2026 | This is a Technical Journal: DTC TCM P277C07 set. If the TCM DTC listed below is set, A new transmission hardware solution has been introduc… |
| 36496.10.0 | Service bulletin | May 7, 2026 | This is a Technical Journal: Intermittent knocking noise during acceleration. If the sound corresponds to attached sound file, change front… |
| 37299 | Service bulletin | Feb 4, 2026 | This a Technical Journal plus 1 mp4 file If a customer experiences noise from the rear of the vehicle, often generated at low speeds and dur… |
| 37228 | Service bulletin | Dec 20, 2025 | This is a Technical Journal: Vehicle jerks in low speed when Start/Stop is active. Improved software is introduced from version 3.5.14. |
| 35732 | Service bulletin | Mar 14, 2025 | This is a Technical Journal: Clicking sound from transmission area. This is considered a normal operating characteristic/function of the ve… |
| 36989 | Service bulletin | Mar 11, 2025 | This is a Technical Journal: Vehicle jerks and TCM DTC P071164 set. A software solution is introduced from version 3.4.4. |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Volvo, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Volvo 37504 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 37504 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 37504 cover?
The manufacturer filed it against 5 model years: 2023 Volvo C40, 2022 Volvo C40, 2023 Volvo XC40, 2022 Volvo XC40, 2021 Volvo XC40. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.