The defect
Daimler Trucks North America, LLC (DTNA) is recalling certain 2021 Thomas Built Saf-T-Liner C2 Jouley electric school buses. If the service brake pedal is pressed and then released while the parking brake is engaged, the parking brake may release unexpectedly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 121, "Air Brake Systems."
The risk
An unexpected disengagement of the parking brake without continual application of the service brake may allow the vehicle to roll freely, increasing the risk of a vehicle crash.
The remedy
DTNA will notify owners, and dealers will update the electronic control unit (ECU) software, free of charge. The recall began January 22, 2021. Owners may contact DTNA customer service at 1-800-745-8000. DTNA's number for this recall is FL-870.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Thomas Built Buses SAF-T-Liner C2 | 2021 |
Components: PARKING BRAKE:CONVENTIONAL:AIR | SERVICE BRAKES, AIR | PARKING BRAKE:ELECTRICAL:CONTROL MODULE:SOFTWARE
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Thomas Built Buses SAF-T-Liner C2 | 2021 | 0 | 15 |
Other service brakes, air recalls in 2020
14 of the 782 recall campaigns reported to NHTSA in 2020 concerned the service brakes, air; Daimler Trucks North America, LLC filed 166 campaigns in all.
| 20V593000 28 Sept 2020 | PACCAR Incorporated |
| 20V536000 2 Sept 2020 | Volvo Trucks North America |
| 20V390000 2 Jul 2020 | Daimler Trucks North America LLC |
| 20V388000 2 Jul 2020 | Jayco, Inc. |
| 20V383000 1 Jul 2020 | Hino Motors Sales U.S.A., Inc. |
| 20V233000 27 Apr 2020 | Motor Coach Industries |
| 20V167000 20 Mar 2020 | Thor Motor Coach |
| 20V171000 20 Mar 2020 | Newmar Corporation |
NHTSA recalls (public domain) · all recalls of 2020