Volvo bulletin 37871.1.0
What it saysThis is a TJ - Text only no attachments - During the first year in production of the new engines, with the updated transmission calibration, we need to follow up on transmission shift quality. NHTSA’s full summary ↓
Volvo filed this with NHTSA as a service bulletin dated Jul 11, 2026, received Aug 18, 2026, about the power train. 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 only no attachments - During the first year in production of the new engines, with the updated transmission calibration, we need to follow up on transmission shift quality. For this reason, it is not allowed to perform any repairs on the transmission before RTS (Volvo Cars Retailer Technical Support) has been contacted. No transmissions should be repaired or replaced without approval or a request from RTS.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 37871.1.0 | Service bulletin | Jul 11, 2026 | 11036242 |
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 power train
Source: same model, same component group25 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 |
|---|---|---|---|
| 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… |
| 36894.5.2 | Service bulletin | Sep 9, 2026 | This is a Technical Journal: Long Range PHEV ERAD Knocking Noise Repair Kit. Install a repair kit. |
| 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… |
| 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. |
| 37624 | Service bulletin | Dec 19, 2025 | This is a TJ - Text only no attachments If a decision is taken to replace a cell module and the vehicle has VDN code CK04, please follow inf… |
| 36814 | Service bulletin | Jun 13, 2025 | This is a Technical Journal: Transmission Shifts From D or R to P Immediately After Starting. This symptom can occur if the driver changes t… |
| 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… |
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 37871.1.0 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 37871.1.0 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 37871.1.0 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.