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Gillig LOW Floor Recall 21V538: Excess ammonia in exhaust can increase injury risk

NHTSA campaign 21V538, reported July 15, 2021, 78 vehicles potentially affected.

What this recall means for you

The engine calibration software controlling how Diesel Exhaust Fluid is injected can allow excessive ammonia to be released through the tailpipe. This affects certain 2020 and 2021 Gillig Low Floor buses equipped with Cummins L9 diesel engines.

Exposure to high levels of ammonia can increase the risk of injury. Owners and operators should take this recall seriously and arrange for the repair promptly.

The remedy is free: Cummins will recalibrate the engine at no charge. To schedule the work or ask questions, contact Gillig customer service at 1-510-264-5073 or 1-800-735-1500. You can also check your vehicle identification number (VIN) for any open recalls.

Check whether this recall is open on your vehicle

The repair is normally free at an authorized dealer.

Official recall notice

Safety recall 21V538Gillig, LLC
Component
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
Problem
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.
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.

Affected vehicles

Gillig LOW Floor20202021