Volvo service campaign SC S4644 202601
What it saysSC - Front Engine Accessory Drive Update. NHTSA’s full summary ↓
Volvo filed this with NHTSA as a service campaign dated Jan 25, 2026, received Feb 2, 2026, about the engine. It names 2 model years (2026). A service campaign is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationSC - Front Engine Accessory Drive Update.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| SC S4644 202601 | Service campaign | Jan 25, 2026 | 11028028 | PDF, 1,174 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 themAlso filed against: 2026 Volvo VHD; 2026 Volvo VN.
None of these model years has a page on this site (it covers EPA-certified cars, trucks and SUVs from 2016), so the bulletin is listed here on its own.
More bulletins about the engine
Source: same model, same component group24 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 |
|---|---|---|---|
| M0307 EC0033 202606 | Emissions | Jun 2, 2026 | Volvo Trucks has determined that certain vehicles equipped with a model year (“MY”) 2017-2018 13L Turbo Compound (TC) engine may not meet Ca… |
| M0305 022026 | Emissions | Feb 1, 2026 | Emissions - Volvo Trucks has determined that certain vehicles equipped with a model year (“MY”) 2017-2018 11L engine may not meet California… |
| SC S4643 202601 | Service campaign | Jan 1, 2026 | SC - S4643 January 2026 Front Engine Accessory Drive Update. |
| S4683 202511 | Service campaign | Nov 4, 2025 | CBR - Parking Heater ECU Replacement. |
| S4663 202511 | Service campaign | Nov 4, 2025 | CBR - Engine Cooling Fan Overdrive. |
| S0203 102025 | Service campaign | Oct 3, 2025 | SC - Volvo Trucks has identified that certain VNL model vehicles equipped with the 13L engine may encounter low oil pressure faults. |
| S4566 092025 | Service campaign | Sep 1, 2025 | EATS mixer section may have a 2-inch section that was not welded correctly. |
| S4532 072025 | Service campaign | Jul 1, 2025 | SC - Volvo Trucks has determined that certain VN and VN 4 model trucks equipped with a D13 Turbo Compound (TC) engine may experience TC Doub… |
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 SC S4644 202601 a recall?
No. A service campaign 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.
Is the SC S4644 202601 repair free?
A service campaign is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does SC S4644 202601 cover?
The manufacturer filed it against 2 model years: 2026 Volvo VHD, 2026 Volvo VN. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.