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Campaign 21V326 Posted May 7, 2021 9,662 units

2018-2021 Freightliner Recall 21V326: Fuel Rail Leak

RN
Reviewed by the RecallNotify editorial team
Published May 24, 2026

Recall 21V326 affects 9,662 2018-2021 Freightliner and Western Star trucks for a fuel rail leak fire risk. Free repair once Freightliner opens it.

Freightliner is recalling 9,662 2018-2021 Business Class M2, 108SD, 114SD, and Western Star 4700 trucks under recall 21V326 because a sealing washer in the high pressure fuel rail can fail to seat, letting fuel leak. A fuel leak near an ignition source raises the risk of a fire, and the dealer repair will be free once Freightliner finalizes the remedy.

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What's wrong?

The high pressure fuel rail is a metal accumulator that holds diesel fuel at very high pressure before it reaches the injectors. On these Freightliner trucks and chassis, the rail sits on top of the engine and feeds each cylinder through short steel lines. A sealing washer seats inside small pilot bore holes to keep that pressurized fuel inside the rail.

On affected trucks, the sealing washer does not seat correctly in the pilot bore holes. Because the seal is incomplete, pressurized diesel fuel can weep or spray out of the rail while the engine is running. Leaking fuel near a hot engine is a fire risk, which is why the recall covers bus, school bus, emergency, and recreational applications where occupants sit close to the engine.

There is no warning sign before failure. An owner or driver will not feel a change in how the truck drives before the leak starts, so the dealer inspection is the only reliable way to confirm the seal.

Who's affected?

Spans seven Daimler-built truck and chassis lines (Freightliner 108SD, 114SD, Business Class M2, Custom Chass Xb, FCCC Xb Chassis, FCCC Xc Chassis, and Western Star 4700) across four model years, all sharing the same high-pressure fuel rail assembly.

2019 Freightliner 108SD fuel system
2019 Fccc Xb Chassis fuel system
2020 Freightliner 108SD fuel system
2019 Fccc Xc Chassis fuel system
2020 Freightliner 114SD fuel system
Units affected9,662

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

What's the safety risk?

A fuel leak near an ignition source raises the risk of an underhood or undervehicle fire, which can spread quickly and threaten anyone in or around the truck. Watch for a strong fuel smell, visible wetness on the rail or lines, or a fuel gauge dropping faster than the mileage explains, and stop the vehicle in a safe place if you notice any of them. Repair will be free at any franchised Freightliner dealer once available.

What should I do?

  1. Check your VIN to confirm your 2018-2021 Freightliner truck or chassis is included in this recall.
  2. Watch for the final remedy notification from Freightliner, since the fuel-rail and fuel-line replacement is still under development.
  3. Park the truck outside and away from structures if you smell fuel or see a leak, because a leak near an ignition source raises the fire risk.
  4. Contact a franchised Freightliner dealer to ask about interim guidance and to be added to the repair list for the fuel-rail and fuel-line replacement that fixes the leaking high-pressure fuel rail.
  5. Call DTNA customer service at 1-800-547-0712 with questions and reference recall number 21V326 (DTNA recall FL-886) when you call.
  6. Keep the interim owner notification letter mailed on June 21, 2021, and bring it to the dealer once the final repair opens.

What happens at the repair

Freightliner's recall remedy is still under development. Once it opens, a Freightliner technician will replace the high pressure fuel rail and the fuel lines on the affected chassis. Parts and labor will be free under the recall. Interim owner notification letters were mailed on June 21, 2021, so the recall is open with the manufacturer even though the final repair is not yet scheduled. The final dealer repair will be free once it opens.

Timeline

May 7, 2021 NHTSA published the recall
July 5, 2021 Dealer notification began
July 5, 2021 Dealer notification ended
July 5, 2021 Interim owner notification (was planned for this date)
July 30, 2021 Owner notification mailed

Frequently asked questions

What is recall 21V326?

Recall 21V326 covers 9,662 2018-2021 Freightliner and Western Star trucks, plus FCCC chassis, with a high-pressure fuel rail sealing washer that can fail to seat correctly in the pilot bore holes. The resulting fuel leak near an ignition source increases fire risk. Dealers will replace the fuel rail and fuel lines at no cost.

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

Check your VIN to confirm your specific truck is included in recall 21V326. If it is, contact a franchised Freightliner dealer to schedule the fuel rail and fuel line replacement once the final remedy opens. Reference recall number 21V326 or Daimler's internal number FL-886 when you call. The repair is free.

Is the recall repair free?

Yes. Federal recall law requires manufacturers to repair the defect at no cost, and Daimler Trucks North America will replace the fuel rail and fuel lines free of charge at any franchised Freightliner or Western Star dealer regardless of where the truck was originally purchased.

What is the safety risk from the fuel rail leak?

If the sealing washer does not seat correctly, the high-pressure fuel rail assembly can leak. A fuel leak in the presence of an ignition source increases the risk of a fire. Park the truck away from structures and other vehicles if you notice a fuel smell, visible leak, or fuel pooling, and contact your dealer.

When will the final repair be available?

The final remedy is still under development. Daimler Trucks North America mailed interim owner notification letters on June 21, 2021, explaining the defect. A second letter will go out once parts and repair instructions are ready. Owners can call DTNA customer service at 1-800-547-0712 with questions in the meantime.

More information

NHTSA campaign pagenhtsa.gov/vehicle-recalls/21V326000
Freightliner customer service1-800-547-0712
NHTSA recall #21V326
NHTSA recall # (full)21V326000

Source documents

This article is generated from NHTSA's primary recall filings and reviewed against the source on May 24, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →