NHTSA Recall 21V538000: Manifold/header/muffler/tail pipe (engine and engine cooling)
Gillig, LLC reported this safety recall to NHTSA on , covering an estimated 78 vehicles. It affects 2020–2021 Gillig Low Floor.
| NHTSA campaign | 21V538000 |
|---|---|
| Component | ENGINE AND ENGINE COOLING › EXHAUST SYSTEM › MANIFOLD/HEADER/MUFFLER/TAIL PIPE |
| Report received | July 15, 2021 |
| Owner notification | October 14, 2021 |
| Initiated by | Manufacturer |
Defect
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.
Safety risk
Exposure to high levels of ammonia can increase the risk of injury.
Remedy
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.
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.
Vehicles covered by recall 21V538000
Being listed here means the campaign covers the model year, not that every car was built with the defect or is still unrepaired. Enter your VIN above to check your specific vehicle. Recall repairs are free at authorised dealers. Source: NHTSA, October 2026.