RecallNotify
Sign up Check my VIN
Home/ Recalls/ Kenworth/ 21V391
Campaign 21V391 Posted May 26, 2021 612 units

2018-2021 Kenworth T270-T880 Recall 21V391: Fuel Rail

RN
Reviewed by the RecallNotify editorial team
Published May 23, 2026

Recall 21V391 covers 612 2018-2021 Kenworth and Peterbilt trucks for high-pressure fuel rail leak. Repair will be free at any franchised Kenworth dealer once available.

Kenworth is recalling 612 2018-2021 T800B, T470, and T270 trucks under recall 21V391 because a sealing washer in the high pressure fuel rail assembly can seat incorrectly and allow fuel to leak. A fuel leak near an ignition source increases the risk of a fire, and the dealer repair will be free once available.

Does this recall apply to your specific vehicle?

The official, free per-VIN recall check is run by NHTSA. Enter your VIN and we'll forward you directly — and add you to a free watchlist so you hear about new recalls for your vehicle.

Check my VIN at NHTSA

RecallNotify doesn't check your VIN — NHTSA's official tool does. We use your email only to alert you to new recalls.

What's wrong?

The high pressure fuel rail on affected 2018-2021 Kenworth vehicles is the metal passage that feeds diesel fuel to the engine's injectors. It holds fuel under high pressure so each injector receives a steady supply at the right moment. The sealing washer sits in a pilot bore, a small machined seat that helps close the joint where the rail is assembled.

On these vehicles, the pilot bore holes in the Cummins diesel fuel rail are undersized. That keeps the sealing washer from sitting flat and sealing the joint. Once the washer does not seat correctly, diesel fuel escapes from the high pressure rail assembly instead of staying inside the fuel system.

Owners can smell diesel fuel or see fuel leaking near the engine. Those are the warning signs to report when contacting a Kenworth dealer about recall 21V391.

Who's affected?

Spans Kenworth and Peterbilt trucks from 2018 through 2021, all tied to the Cummins L9 fuel rail.

2021 Kenworth T800B fuel system
2019 Kenworth T470 fuel system
2019 Kenworth T270 fuel system
2021 Peterbilt 365 fuel system
2019 Peterbilt 367 fuel system
Units affected612
Field incidentsNHTSA has logged 366 field incidents to date.

A matching year and model does not guarantee inclusion. Check your VIN to confirm whether your specific truck is included.

What's the safety risk?

A fuel leak near an ignition source increases the risk of a fire. If you smell diesel fuel or see a leak, park safely, shut the engine off, and call a Kenworth dealer before driving again. Repair will be free at any franchised Kenworth dealer once available.

What should I do?

  1. Check your VIN to confirm your 2018-2021 Kenworth T800B, T470, T270, T370, T880, T800, T440, 365, 367, 337, 567, 520, or 348 is included in this recall.
  2. Wait for Kenworth repair instructions before scheduling dealer work; the inspection and any needed fuel-rail replacement are free once the repair opens.
  3. Contact a franchised Kenworth dealer after the repair opens for the fuel-rail inspection that checks for the washer seating problem and fuel leak.
  4. Reference recall number 21V391 when you call, and bring the recall notice if Kenworth mailed one.
  5. Park away from ignition sources and stop driving if you smell fuel or see a diesel leak until the truck is inspected.

What happens at the repair

At the dealer, once the repair opens, a Kenworth technician will inspect the rail threads and fuel lines. If the inspection shows damage or a fit problem, the technician will replace the fuel rail. The final dealer repair will be free once available, with parts and labor covered under the recall. PACCAR has a general reimbursement plan on file, so owners who already paid for a related fuel rail or fuel line repair should submit documentation through the manufacturer's reimbursement process.

ReimbursementReimbursement available

Timeline

May 26, 2021 NHTSA published the recall
July 24, 2021 Dealer notification began
July 24, 2021 Dealer notification ended
July 24, 2021 Interim owner notification (was planned for this date)
July 30, 2021 Owner notification mailed

Frequently asked questions

What is recall 21V391?

Recall 21V391 covers 612 2018-2021 Kenworth vehicles with a high-pressure fuel rail sealing washer that fails to seat correctly. Fuel can leak from the rail assembly, and fuel near an ignition source increases fire risk. Dealers will inspect the rail threads and fuel lines, then replace the rail as needed for free.

What should I do if my 2018-2021 Kenworth is on this recall?

Check your VIN to confirm your specific vehicle is included in recall 21V391. If it is, call a franchised Kenworth dealer and ask for the current repair status for PACCAR recall 21KWC. The dealer repair is free once the inspection and needed fuel-rail work are available.

Is the recall repair free?

Yes. Federal recall law requires manufacturers to repair safety defects at no cost. For recall 21V391, dealers will inspect the rail threads and fuel lines, then replace the rail as necessary free of charge.

What is the safety risk?

The safety risk is fire. Recall 21V391 involves a high-pressure fuel rail assembly that leaks when the sealing washer fails to seat correctly in the pilot bore holes. A fuel leak near an ignition source increases the risk of a fire.

What if I bought this vehicle used?

The free recall repair still applies. Recall coverage follows the VIN, not the first owner. Check your VIN to confirm whether your 2018-2021 Kenworth is included, then reference recall 21V391 and PACCAR recall number 21KWC when you call the dealer.

More information

NHTSA campaign pagenhtsa.gov/vehicle-recalls/21V391000
Kenworth customer service1-425-828-5888
NHTSA recall #21V391
NHTSA recall # (full)21V391000

Source documents

This article is generated from NHTSA's primary recall filings and reviewed against the source on May 23, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →