Gillig recall: Engine and engine cooling
What is wrong
Gillig, LLC (Gillig) is recalling certain 2020-2021 Low Floor vehicles equipped with Cummins L9 Diesel Engines. The engine calibration software's management of the injection of Diesel Exhaust Fluid can allow excessive ammonia into the tailpipe exhaust.
What could happen
Exposure to high levels of ammonia can increase the risk of injury.
The fix
Cummins will recalibrate the engine, free of charge. Owners may contact Gillig's customer service at 1-510-264-5073 or 1-800-735-1500.
Vehicles covered
- Gillig Low Floor 2020–2021
Facts
- NHTSA recall number
- 21V538000
- Type
- Vehicle
- Filed by
- Gillig, LLC
- Reported to NHTSA
- Jul 15, 2021
- Owners notified
- Oct 14, 2021
- Vehicles or items affected
- 78
- Started by
- The manufacturer
- Built
- –
- Part
- Engine and engine cooling › Exhaust system › Manifold/header/muffler/tail pipe
Notes
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.nhtsa.gov.
Other recalls for the same vehicles
- Gillig recall: Equipment Mar 26, 2026
- Gillig recall: Electrical system Mar 12, 2026
- Gillig recall: Fuel system, diesel Mar 12, 2026
- Gillig recall: Suspension Dec 29, 2025
- Gillig recall: Equipment adaptive/mobility Dec 16, 2025
- Gillig recall: Structure Dec 15, 2025
To check one car, enter its 17-character VIN on the official NHTSA page: a recall may cover only some vehicles of a model year.
Recall data: National Highway Traffic Safety Administration (NHTSA). Nebula is not affiliated with or endorsed by NHTSA.