PETERBILT 579 (2021) recall — Service Brakes, Air
PACCAR recalls 2021 Peterbilt 579 trucks with potential brake chamber assembly issues that could cause loss of air pressure and crash risk. Owners must contact PACCAR for free brake chamber replacement.
Use caution until it’s fixed
The pressure plate may tear the diaphragm, causing a loss of air pressure and increasing the risk of a crash.
Contact the company & request your remedy
What happened, in plain English
PACCAR is recalling certain 2021 Peterbilt 579 trucks because their brake chambers may have incorrect springs that could cause brake failure. This could lead to a crash if the air pressure drops unexpectedly. Read more at govinfonow.com/recall/80625-peterbilt-2021-579-recall-brake-failure-risk.
Source Summary by GovInfoNow · govinfonow.com/recall/80625-peterbilt-2021-579-recall-brake-failure-risk · Updated October 4, 2026 · Official notice: NHTSA #21V328000
Cite this page
“Peterbilt 2021 579 Recall: Brake Failure Risk.” GovInfoNow, updated October 4, 2026. https://govinfonow.com/recall/80625-peterbilt-2021-579-recall-brake-failure-risk. Based on NHTSA recall #21V328000 (https://www.nhtsa.gov/recalls?nhtsaId=21V328000).
Why it’s dangerous
The brake chamber may have been assembled with springs that don't meet specifications. This can cause the pressure plate to shift, leading to a loss of air pressure and potential brake failure.
Who’s affected
Owners of 2021 Peterbilt 579 trucks are affected. Drivers using these trucks without the fix are at risk of brake failure during normal operation.
How to tell if you have this one
Check if your 2021 Peterbilt 579 truck was mailed a notification letter. The recall covers vehicles with incorrect spring assembly in the brake chamber.
- Brand
Peterbilt- Category
Vehicle
What to do — step by step
Contact PACCAR
Call PACCAR customer service at 1-940-591-4220 to schedule brake chamber replacement.
Get Free Brake Chamber Replacement
Dealers will replace the brake chamber at no cost to fix the assembly issue.
What NHTSA says to do
Dealers will replace brake chambers, free of charge. Owner notification letters were mailed on July 9, 2021. Owners may contact PACCAR (Peterbilt) customer service at 1-940-591-4220. PACCAR's number for this recall is 21PBE.
Questions people ask
Why is my Peterbilt 579 being recalled?
The brake chamber may have been assembled with incorrect springs that could cause the pressure plate to shift, leading to brake failure.
How do I know if my truck is affected?
Check if your 2021 Peterbilt 579 truck received a notification letter from PACCAR. The recall covers vehicles with incorrect spring assembly in the brake chamber.
Is there a deadline to fix this?
The recall notice does not specify a deadline for the repair; owners can contact PACCAR to schedule the replacement.
Contact Peterbilt
We’ve drafted a message you can send Peterbilt to request your refund or repair — edit it as you like.
Subject: Recall 21V328000 — Peterbilt Peterbilt Hello, I own a Peterbilt that is covered by recall 21V328000 from Peterbilt. The official recall notice states: Dealers will replace brake chambers, free of charge. Owner notification letters were mailed on July 9, 2021. Owners may contact PACCAR (Peterbilt) customer service at 1-940-591-4220. PACCAR's number for this recall is 21PBE. I’m writing to arrange the remedy described in the recall (a refund, repair, or replacement as applicable). Could you please tell me the next steps to resolve this? Thank you.
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Where this comes from
The facts (hazard, remedy, dates, manufacturer) are pulled from the official NHTSA recall record. The plain-language summary and step-by-step checklist are written by GovInfoNow to make the official notice easier to act on — they don’t replace it.
- Official source: NHTSA Recall #21V328000 (October 5, 2021)
- Plain-language summary written by qwen3:4b on October 4, 2026, from the official record above. Not reviewed by a person — if it conflicts with the NHTSA notice, the notice is correct. Report an error on this page.
- GovInfoNow is an independent service and is not a government agency. We republish official NHTSA recall data; we don’t issue, amend or administer recalls.