Volvo bulletin 36663.1.0
Volvo filed this with NHTSA as a service bulletin dated Jun 30, 2023, about the electrical system. It names 2 model years (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. Replacement of OBC or HLCM, SW download failure. perform a new RELOAD of the unit.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 36663.1.0 | Service bulletin | Jun 30, 2023 | 10238369 | PDF, 496 KB |
What the document itself lists
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 32324575 | — | — | |
| 32324662 | OBC HW | — | eBay Motors → |
| 32361035 | — | — | |
| 32361036 | HLCM HW | — | eBay Motors → |
Read by machine from the document NHTSA serves (2 pages), read Sep 30, 2026. A part number is shown only where it matches Volvo’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.
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.
Find the software for the 2024 C40 →Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
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 2 model years this bulletin names have filed 30 complaints with NHTSA since 2015. 8 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.
There are 2 very serious safety issues that are extremely dangerous with this car. #1 - The Automatic Intervention Rear Brake Auto Brake engages for no reason when there is nothing behind the car. It happens when I am backing up very slowly. It throws me forward and then thrusts me back into the headrest.
2024 Volvo C40 · Electrical System · filed with NHTSA Jun 29, 2025 · ODI 11670052
Front camera stop working . Today it's the second time. Not sure if a software glitch but first time need to be replaced
2024 Volvo XC40 · Electrical System · filed with NHTSA Jul 5, 2026 · ODI 11748329
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 group57 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 |
|---|---|---|---|
| 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 |
| 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… |
| TJ37103.3.0-2025-11-13 | Service bulletin | Nov 19, 2025 | This is a Technical Journal: Check Engine Light/DIM message and ISGM DTC P056200 or in combination with all the DTCs |
| 37376 | Service bulletin | Oct 22, 2025 | This is a Technical Journal: Propulsion Message with DTC BECM P0A9500 and/or P0E2F00. Perform a "High-voltage system overview" read out. If… |
| 37451 | Service bulletin | Jul 31, 2025 | This is a Technical Journal: MVBM-U007700 set together with ECM-P0A7B68 at PDS. Delete the DTC´s. Do not reload MVBM software. IF the DTC´s… |
| 37103 | Service bulletin | Jul 23, 2025 | This is a Technical Journal: Check Engine Light/DIM message and ISGM DTC P056200. |
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 36663.1.0 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 36663.1.0 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 36663.1.0 cover?
The manufacturer filed it against 2 model years: 2024 Volvo C40, 2024 Volvo XC40. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.