The Recall Desk
Our severity:SevereNHTSA·21V328000·Announced 2021-05-10

2021 Peterbilt Brake Chamber Defect May Increase Crash Risk

PACCAR is recalling certain 2021 Peterbilt 348 and 579 vehicles due to brake chamber defects. Incorrectly assembled springs may cause pressure loss and increase crash risk.

What this means for you

Our assessment, not the agency’s: severity 4/5 (Severe).

The hazard poses a serious risk of illness, injury, or structural failure. Stop using the product immediately and contact the manufacturer for a refund or repair.

Our severity reasoning: This defect affects a critical structural component—the vehicle brake system—which if it fails could result in loss of braking ability and increased crash risk. Per the rubric, structural vehicle defects qualify for Severity 4 (Severe) classification.

Plain-English summary

PACCAR Incorporated is recalling certain 2021 Peterbilt 348 and 579 vehicles due to a defect in the spring brake chamber. The brake chamber may have been assembled with incorrect springs that are out of specification, which may cause the pressure plate to shift.

If the pressure plate shifts, it may tear the diaphragm within the brake chamber. This can lead to a loss of air pressure in the braking system, increasing the risk of a crash.

PACCAR dealerships will replace the affected brake chambers at no charge to owners. Owner notification letters were mailed on July 9, 2021. Owners can contact PACCAR customer service at 1-940-591-4220 to schedule the repair. Additional information is available from the National Highway Traffic Safety Administration at 1-888-327-4236 or www.safercar.gov.

Approximately 13 vehicles are potentially affected by this recall.

The recalled product

Product
PETERBILT 579, 348
Brand
PETERBILT
Manufacturer
PACCAR Incorporated
Category
Vehicle — Brakes
Hazard
Affected units
13

Is your product affected?

Check your packaging against the codes below. If any of them match, the product is part of this recall.

Model numbers (2)

  • 579
  • 348

Distribution

Distributed nationwide across the United States.

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