Volvo bulletin 37844.2.0
What it saysThis is a TJ - text, plus 1 attached PDF - and 2 .MOV files If a noise from the engine occurrs during idling, refer to the attached sound file for reference and comparison; see attachment TJ_37844_1.MOV. NHTSA’s full summary ↓
Volvo filed this with NHTSA as a service bulletin dated Sep 12, 2026, received Oct 5, 2026, about the engine. It names 2 model years (2027). 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, plus 1 attached PDF - and 2 .MOV files If a noise from the engine occurrs during idling, refer to the attached sound file for reference and comparison; see attachment TJ_37844_1.MOV. If the noise corresponds to the attached sound file, make sure that the fresh air hose is not squeezed or kinked; see attachment TJ_37844_2.MOV. For location and correct clip positions, see attachment TJ_37844_1.pdf. Note that this noise is similar to the chirping noise from the camshaft seal described in TJ 36551.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 37844.2.0 | Service bulletin | Sep 12, 2026 | 11037961 |
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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More bulletins about the engine
Source: same model, same component group32 other manufacturer communications filed against these Volvo models under the same component group (engine), newest first. The eight newest are listed; the rest are on the Volvo list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 37083.8.1 | Service bulletin | Sep 24, 2026 | This is a Technical Journal: Text plus 1 MP4 - Not possible to go to Drive mode after ERS start. Download software. Please follow the advice… |
| 37316.5.0 | Service bulletin | Sep 12, 2026 | This is a Technical Journal: DTC ECM-P06DE00 set, no symptoms. Do not replace any parts or perform additional fault tracing. This is a misde… |
| 37844.1.0 | Service bulletin | Jun 26, 2026 | This is a TJ - text, plus 1 attached PDF - and 2 .MOV files If a noise from the engine occurrs during idling, refer to the attached sound fi… |
| 35526.1.8 | Service bulletin | Apr 23, 2026 | This is a Technical Journal: Text plus 2 PDFs and 1 .PNG Oil Consumption test. Perform the test. Follow service procedure Description and S… |
| 36923.9.1 | Service bulletin | Apr 22, 2026 | This is a Technical Journal: Text document plus 1 PDF attachment Coolant Pump Dry Coolant Mix Residue. If the coolant pump has an active lea… |
| 37083.7.0 | Service bulletin | Apr 18, 2026 | This is a Technical Journal: Text plus 1 MP4 - Not possible to go to Drive mode after ERS start. Download software. Please follow the advice… |
| 37288.4.0 | Service bulletin | Feb 21, 2026 | This is a Technical Journal: MIL and DTCs ECM P012807/P01287A. In case of MIL and DTCs P012807 and P01287A set together, follow advice under… |
| 36923 | Service bulletin | Feb 17, 2026 | This is a Technical Journal: Text document plus 1 PDF attachment Coolant Pump Dry Coolant Mix Residue. If the coolant pump has an active lea… |
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 37844.2.0 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 37844.2.0 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 37844.2.0 cover?
The manufacturer filed it against 2 model years: 2027 Volvo XC60, 2027 Volvo XC90. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.