ZF North America Brake Chamber: Service Brakes, Air recall
NHTSA campaign 25E027000 · 2,090 units potentially affected · filed Apr 14, 2025
What's wrong
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.
Why it matters
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.
The fix
Nova Bus will replace the brake chambers, free of charge. Owner notification letters were mailed August 21, 2025. Owners may contact Nova Bus customer service at 1-450-472-6410. Nova Bus's number for this recall is CR5720.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1- 888-275-9171), or go to www.safercar.gov.
Recall details
- NHTSA campaign
- 25E027000
- Manufacturer no.
- CR5720
- Manufacturer
- Nova Bus (us) Inc.
- Component
- SERVICE BRAKES, AIR:DISC:CHAMBER
- Units affected
- 2,090
- Report received
- Apr 14, 2025
- Owner letters
- Aug 1, 2025
- Type
- Equipment
Check whether your vehicle is included with the official NHTSA VIN lookup or your dealer. Repairs for safety recalls are free.