Excessive ammonia in tailpipe exhaust
Defect Summary
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.
Safety Consequence
Exposure to high levels of ammonia can increase the risk of injury.
Corrective Action
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.
Similar Recalls
Other recalls from Cummins, Inc. or involving Engine And Engine Cooling.
FAQ: Recall 21E060000
Your rights, the repair process, and what each field on this page means.
What is recall 21E060000?
NHTSA recall 21E060000 was issued by Cummins, Inc. on June 29, 2021. It addresses: Excessive ammonia in tailpipe exhaust. The recall affects approximately 494 vehicles, with the defect involving the Engine And Engine Cooling component.
How do I get this recall repaired?
Contact any authorized Cummins, Inc. dealer and reference NHTSA recall ID 21E060000 or the manufacturer campaign number NR (Not Reported). Under federal law, the repair is completely free regardless of vehicle age or owner history.
Is my vehicle included in this recall?
The only way to confirm is to look up your 17-character VIN at nhtsa.gov/recalls. NHTSA's tool will tell you if VIN-by-VIN this exact recall applies.
How long do I have to get a recall repair done?
There is no expiration on most federal safety recalls. Even if your vehicle is years old and you bought it used, the manufacturer is required to perform the repair at no cost.
Where does the data on this page come from?
All information on this page is sourced directly from the U.S. Department of Transportation public dataset for NHTSA recalls. Last refreshed: 2026-05-22. For the most current official notice, visit nhtsa.gov/recalls.