Cummins L9, model year 9999. Filed by Cummins, Inc. and reported to NHTSA on 29 June 2021. 494 vehicles potentially affected.
What the notice says 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.
Is your vehicle included? Check with your VIN at NHTSA, or ask a dealer. This page is an independent copy of the notice, kept so you can see what changed after it was published. It is not the authority, and the authority’s own text is the one to act on.
What owners ask about this recall
- Which vehicles does recall 21E060 cover?
- Cummins L9.
- What is wrong with them?
- 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.
- What can happen if it is not put right?
- Exposure to high levels of ammonia can increase the risk of injury.
- Is there a fix yet?
- Yes, and it is free. 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.
- What should I do now?
- Check your own vehicle by its VIN with NHTSA, which is the record to act on.
Answered from the register this site holds. NHTSA is the record to act on.
What the authority says can happen if this is not fixed: “Exposure to high levels of ammonia can increase the risk of injury.”
affected
in the notice
caught
| Campaign | 21E060 |
|---|---|
| Filed by | Cummins, Inc. |
| System at fault | Engine And Engine Cooling:Exhaust System:Manifold/Header/Muffler/Tail Pipe |
| Reported to NHTSA | 29 June 2021 |
| Model years | 9999-9999 |
| Vehicles named | CUMMINS L9 |
What the notice says today
The consequence
Exposure to high levels of ammonia can increase the risk of injury.
The remedy
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.
What it said before
This campaign is in the register but not yet in the dated wording archive, so we cannot yet say whether its text has moved. It enters the archive on the next pass.
This is one of 588 notices in the record whose component field names engine and engine cooling. Across that group the median wait before owners were written to was 47 days.
Last checked . No change has been recorded in the wording.
How to cite this record
Quoting the wording on this page means quoting a version, so the date belongs in the citation:
CarsMultiverse, recall 21E060, wording as read on 15 September 2026. https://carsmultiverse.com/recall/21e060/
The cross-border matches used on this site are deposited as a citable dataset: doi:10.5281/zenodo.22087136. The recall wording itself is published by the national authority named above and is theirs, not ours.
The recall record and its wording are published by the US National Highway Traffic Safety Administration and are US Government public domain. The dated archive, the comparison and any before-and-after above are CarsMultiverse. How fresh every engine behind this page is, is public on the status page. To check a specific vehicle, use NHTSA’s own VIN lookup.
Other Cummins notices we hold
- 26E011: PD7000 Electric Drive, part number BES CM0904 EV104B
- 25E018: the high voltage battery packs in certain PowerDrive 7000 electric drivetrains
- 25E004: L9 diesel engines, part number D563027BX03
- 24V934: 2022-2024 Power Generation C275D2RE trailer-mounted generators
- 24V192: 2023-2024 Power Generation C275D2RE trailers
- 24E106: B6.7 Diesel Engines part numbers RA11741 and RA11769, and F3
- 24E038: Cummins L9 diesel engines with part number D563027BX03
- 23E080: L9N Natural Gas Engines, part number D883007BX03
All 45 Cummins campaigns we hold · Every manufacturer in the record
The fingerprint of this notice
We take a SHA-256 of each of the three blocks of text the authority publishes and keep the first eight characters. As we last read campaign 21E060 on 23 August 2026, they were:
- Defect summary
1c01c030 - Consequence
200260c9 - Remedy
c704198e
We first read this notice on 21 August 2026. It has not moved since. If it ever does, these characters will not match, and the change will be dated here.
The wording we hold for 21E060 · how the whole register is watched
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