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ZF NORTH AMERICA — recall

Automotive · United States · 2025-04-14

ZF North America Knorr-Bresme brake chambers with manufacturing defects

Country	United States
Category	Automotive
Published	2025-04-14
Manufacturer	Nova Bus (US) Inc.
Models affected	BRAKE CHAMBER
Units affected	2090
Defect	Nova Bus (US) Inc. (Nova Bus) is recalling certain ZF North America Knorr-Bresme 20/22-57 brake chambers, with part number K038830N00, sold as replacement parts for certain buses. The brake chamber may have been improperly manufactured, which can result in an air leak._x000D_ A brake chamber air leak may cause the brakes to engage unexpectedly, which can overheat the brakes and increase the risk of a fire. Additionally, unexpected braking can increase the risk of a crash.
Component	SERVICE BRAKES, AIR
Remedy	Nova Bus will replace the brake chambers, free of charge. Owner notification letters are expected to be mailed June 13, 2025. Owners may contact Nova Bus customer service at 1-450-472-6410. Nova Bus's number for this recall is CR5720.
Recall number	25E027000
Official notice	View source ↗

What this means for sellers

Likely platform / channel actions	OEMs/dealers will run the remedy (repair, replace or refund); component suppliers in the chain may face traceback.
Self-check for comparable products	Check your comparable products' design, materials and QC records against the defect described here.
Rules & standards likely involved	FMVSS (NHTSA) · Full guide →

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