Volvo service campaign S4466 2020504
What it saysSC - Volvo Trucks has determined that the XC201 firewall connector lock may not fully latch due to an interference with a tab on the cab hook interface bracket. NHTSA’s full summary ↓
Volvo filed this with NHTSA as a service campaign dated Apr 2, 2025, received May 5, 2025, about the electrical system. It names 1 model year (2025). 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 - Volvo Trucks has determined that the XC201 firewall connector lock may not fully latch due to an interference with a tab on the cab hook interface bracket.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| S4466 2020504 | Service campaign | Apr 2, 2025 | 11017726 | PDF, 459 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: 2025 Volvo VNL (4).
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 electrical system
Source: same model, same component group7 other manufacturer communications filed against the Volvo VNL (4) under the same component group (electrical system), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SC S4864 202604 | Service campaign | Apr 1, 2026 | SC - Alternator Tensioner Belt |
| S4591 202511 | Service campaign | Nov 26, 2025 | CBR - VN(4) Parking Heater Plumbing. |
| SC4405 202504 | Service campaign | Apr 2, 2025 | SC - Volvo Trucks has determined that certain VN model trucks have a mislabeled Electronic Fuse & Relay Center (EFRC) Cover. |
| S4498 202504 | Service campaign | Apr 2, 2025 | SC - Volvo Trucks North America has determined that certain VN(4) model trucks may have been built without the dash-mounted Battery Saver Sw… |
| SC - S4312 202502 | Service campaign | Feb 19, 2025 | SC - Certain Volvo VN (4) model trucks may experience accelerated battery drain due to continuous power consumption by the Vehicle Master Co… |
| S4312 202412 | Service campaign | Dec 19, 2024 | Certain Volvo VN (4) model trucks may experience accelerated battery drain due to continuous power consumption by the Vehicle Master Control… |
| S4254 202412 | Service campaign | Dec 19, 2024 | Certain Volvo VN (4) model trucks built with three flexible switch panels did not receive the correct parameters for the switch panel assign… |
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 S4466 2020504 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 S4466 2020504 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 S4466 2020504 cover?
The manufacturer filed it against 1 model year: 2025 Volvo VNL (4). Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.