2020–2022 Blue Bird All American School Bus, 2020–2022 Blue Bird Vision School Bus Recall: A retainer was not properly seated in the SC-3 single check valve and may…
NHTSA campaign 21V284000 · Service Brakes, Air · filed Apr 22, 2021 · verified Jul 30, 2026
The defect
Blue Bird Body Company (Blue Bird) is recalling certain 2020-2022 Vision and All American school buses. A retainer was not properly seated in the SC-3 single check valve and may not provide source air isolation when pressure is applied. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 121, "Air Brake System."
The risk
Unintended spring brake application may occur, increasing the risk of a crash.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
Dealers will replace the SC-3 check valves, free of charge. Owner notification letters were mailed on November 18, 2021. Owners may contact Blue Bird customer service at 1-478-822-2242. Blue Bird's number for this recall is R21BE-SB.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
Affected vehicles
| Make | Model | Model years |
|---|---|---|
| Blue Bird | All American School Bus | 2020, 2021, 2022 |
| Blue Bird | Vision School Bus | 2020, 2021, 2022 |
Related recalls
More Blue Bird All American School Bus recalls
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Other campaigns involving Blue Bird vehicles
All Blue Bird All American School Bus recalls → · All Blue Bird recalls →
Source: NHTSA recall database, campaign 21V284000 (manufacturer number R21BE-SB). Data last verified Jul 30, 2026.