Recall 25V621 covers 2,307 2025-2026 Volvo Vnl (4) and Vnr (4) trucks for trailer-light failure. Repair is free at any franchised Volvo dealer.
Volvo is recalling 2,307 2025-2026 Vnl (4) and Vnr (4) trucks because an improperly manufactured body control module can leave trailer tail lights and turn signals dark while towing. That makes the trailer harder for other drivers to see, increasing crash risk; Volvo dealers will replace the module free of charge.
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What's wrong?
The trailer body input output module on 2025-2026 Volvo Vnl (4) and Vnr (4) trucks is the control unit that lets the tractor communicate with trailer lighting circuits. When a trailer is connected, the module helps send the commands that turn on the trailer's exterior lights, which other drivers rely on to see the trailer in traffic.
On affected trucks, certain modules were built with a bent printed circuit board assembly, the internal board that carries electrical signals inside the control unit. That manufacturing defect can interrupt communication through the module when towing a trailer. If communication is lost, the trailer lights fail to illuminate even though the truck is connected to the trailer.
The driver can receive a pop-up message saying communication is lost with the trailer body input output module. Treat that message as the warning sign for this defect, especially when a trailer is attached.
Who's affected?
Covers Vnl (4) and Vnr (4) trucks from the 2025 and 2026 model years, all using the same trailer body I/O module.
| 2025 Volvo Vnl (4) | Lighting control module |
|---|---|
| 2026 Volvo Vnl (4) | Lighting control module |
| 2025 Volvo Vnr (4) | Lighting control module |
| Units affected | 2,307 |
| Field incidents | NHTSA has logged 28 field incidents to date. |
Not every 2025-2026 Volvo Vnl (4) or Vnr (4) truck is on the list. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
In NHTSA campaign 25V621, a defective trailer body input/output module can keep trailer tail lights and turn signals from illuminating as intended. That reduces visibility to other drivers and increases crash risk. A pop-up message about lost communication with the trailer module is a warning sign. Schedule the repair soon. Repair is free at any franchised Volvo dealer.
What should I do?
- Check your VIN to confirm your 2025-2026 Volvo Vnl (4) or Vnr (4) is included in this recall.
- Contact a franchised Volvo dealer to schedule the free trailer body input/output module replacement that addresses trailer lights that fail to illuminate.
- Bring the owner letter if you have it. If not, reference recall number 25V621 when you call.
- Inspect trailer tail lights and turn signals before towing, and avoid towing with inoperative trailer lighting until the repair is complete.
What happens at the repair
At the dealer, a Volvo technician replaces the trailer body input/output module that controls trailer lighting when the truck is towing. The replacement parts and labor are covered by the recall. If you've already paid out of pocket for a repair tied to this defect, Volvo's standard reimbursement plan covers documented expenses. Bring repair invoices and payment records to the service desk or contact Volvo Trucks customer service to start the claim.
| Reimbursement | Reimbursement available |
|---|
Timeline
| September 18, 2025 | NHTSA published the recall |
|---|---|
| September 25, 2025 | Dealer notification began |
| September 25, 2025 | Dealer notification ended |
| September 25, 2025 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| November 19, 2025 | Owner notification mailed |
Frequently asked questions
What is recall 25V621?
Recall 25V621 covers 2,307 2025-2026 Volvo Vnl (4) and Vnr (4) trucks with a trailer body input/output module defect. When towing, the trailer tail lights and turn signals can fail to illuminate, reducing visibility to other drivers and increasing crash risk.
What should I do if my 2025-2026 Volvo Vnl (4) or Vnr (4) is on this recall?
Check your VIN to confirm your specific truck is included in recall 25V621. If it is, contact a franchised Volvo dealer to schedule replacement of the trailer body input/output module. Reference Volvo recall number RVXX2507 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair safety defects at no cost, and Volvo dealers will replace the trailer body input/output module free of charge. Parts and labor are covered at any franchised Volvo dealer handling this recall.
What is the safety risk?
The safety risk is reduced visibility while towing. If the trailer tail lights or turn signals fail to illuminate, other drivers have less notice of the truck and trailer's position or lane changes, increasing crash risk. The dealer repair addresses the faulty module.
When were owners notified about this Volvo recall?
Volvo mailed owner letters on November 19, 2025. VINs became searchable on September 25, 2025. If you bought the truck used or never received a letter, Check your VIN and reference recall 25V621 when you contact a Volvo dealer.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/25V621000 |
|---|---|
| Volvo customer service | 800-528-6586 |
| NHTSA recall # | 25V621 |
| NHTSA recall # (full) | 25V621000 |
Source documents
-
Download Quarterly Report (PDF) - Download Recall Document (PDF) (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Owner Notice (PDF)
- Download Recall Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →