Volvo bulletin 35976.4.0
What it saysThis is a Technical Journal: 12V Critical Charge Message w/ MVBM-B166094 MVBM-B165F94 DTC's set. NHTSA’s full summary ↓
Volvo filed this with NHTSA as a service bulletin dated Feb 29, 2024, received Apr 4, 2024, about the electrical system. It names 13 model years (2022–2024). 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 communicationThis is a Technical Journal: 12V Critical Charge Message w/ MVBM-B166094 MVBM-B165F94 DTC's set. Do not replace the MVBM. Delete the DTC´s and perform a SW update. A new SW fix is planned 2024 quarter 1.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 35976.4.0 | Service bulletin | Feb 29, 2024 | 10252681 | PDF, 499 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 13 model years this bulletin names have filed 331 complaints with NHTSA since 2015. 115 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.
After two days of ownership and 148 miles, the car threw a check engine light w/ the following message: "SLOW DOWN. The vehicle will reduce speed. Propulsion system failure." followed by, "Propulsion system service required.". This consequently causes the car to go into 'limp mode' unexpectedly while driving, drastically reducing speed.
2024 Volvo V60 · Electrical System · filed with NHTSA Mar 8, 2024 · ODI 11576180
The contact leased a 2024 Volvo XC90. The contact stated while driving at various speeds, the infotainment screen and instrument cluster went black with the message "Critical Error - Pull Over When Safe". The contact stated that the failure had occurred several times at various speeds. The contact pulled over and turned off the vehicle.
2024 Volvo XC90 · Electrical System · filed with NHTSA Mar 6, 2026 · ODI 11722469
A/C failed to turn on. This is the second time this has occurred. It was on a 100 degree Texas day. I was already in the vehicle and it was so hot in the vehicle I was worried about a heat stroke. It caused a distraction while driving because the electrical components weren’t functioning as intended potentially causing an accident.
2022 Volvo XC60 · Electrical System · filed with NHTSA Sep 17, 2022 · ODI 11484994
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 group90 other manufacturer communications filed against these Volvo models under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Volvo list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 37373.8.0 | Service bulletin | Jul 28, 2026 | This is a Technical Journal: DIM Message and DTC BECM P0C7800. If the DIM displays a message stating "Drive System Service Required" and the… |
| 36863.4.0 | Service bulletin | Jul 28, 2026 | This is a Technical Journal: DIM Message and DTC IEM P0C0500. 1. Erase the DTC 2. Test drive the vehicle in electrical mode and accelerate u… |
| 37373.7.0 | Service bulletin | May 22, 2026 | This is a Technical Journal: DIM Message and DTC BECM P0C7800. If the DIM displays a message stating "Drive System Service Required" and th… |
| 37103.6.0 | Service bulletin | May 13, 2026 | This is a Technical Journal: Check Engine Light/DIM message and ISGM DTC P056200 or in combination with all the DTCs |
| 34295.9.0 | Service bulletin | Mar 10, 2026 | This is a Technical Journal: Text plus 2 attachments 1 PDF and 1 PNG - High Voltage Battery repairs. Always repair the battery according to… |
| 37103.4.0 | Service bulletin | Mar 7, 2026 | This is a Technical Journal: Check Engine Light/DIM message and ISGM DTC P056200 or in combination with all the DTCs |
| 37376.3.0 | Service bulletin | Mar 4, 2026 | This is a Technical Journal: Propulsion Message with DTC BECM P0A9500 and/or P0E2F00. Check the following parameters below. Utilize the High… |
| 37474 | Service bulletin | Feb 3, 2026 | This is a Technical Journal: DC Charging Power Limited to 150 kW. Vehicles equipped with the large HBAT27 (82?kWh) battery are capable of DC… |
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 35976.4.0 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 35976.4.0 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 35976.4.0 cover?
The manufacturer filed it against 13 model years: 2024 Volvo S90, 2023 Volvo S90, 2022 Volvo S90, 2024 Volvo V60, 2023 Volvo V60, 2022 Volvo V60 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.