CUMMINS CUMMINS L9 Recall
Check Your Product
According to the National Highway Traffic Safety Administration (NHTSA)
Product
CUMMINS L9
Brand
CUMMINS
Lot Codes / Batch Numbers
Not specified in NHTSA notice. Check official source for details.
Cummins, Inc. is recalling certain CUMMINS L9 equipment due to engine and engine cooling:exhaust system:manifold/header/muffler/tail pipe issues. Exposure to high levels of ammonia can increase the risk of injury..
Summary derived from NHTSA notice
Reason for Recall
As stated by NHTSA
Cummins, Inc. (Cummins) is recalling certain L9 Diesel Engines, with part number D563027BX03. The engine calibration software's management of the injection of Diesel Exhaust Fluid can allow excessive ammonia into the tailpipe exhaust.
Reported concern (NHTSA)
Exposure to high levels of ammonia can increase the risk of injury.
Recommended Action
Per NHTSA guidance
Dealers will recalibrate the engine, free of charge. Owner notification letters were mailed August 20, 2021. Owners may contact Cummins customer service at 1-800-286-6467.
Verify this information on the official source
For complete details and official instructions, check the National Highway Traffic Safety Administration (NHTSA) directly.
View official NHTSA recall noticePage updated: Jan 10, 2026