Hearth Record

Engine and engine cooling: exhaust system: manifold/header/muffler/tail pipe (Cummins)

Vehicle equipment recall 21E-060. NHTSA received Cummins, Inc.’s report on Jun 29, 2021.

NHTSA’s own record, on nhtsa.gov

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The short answer

NHTSA received Cummins, Inc.’s report on Jun 29, 2021. Copied from NHTSA on Oct 26, 2026.

Every line below is in NHTSA’s own words, with its source beside it.

What’s wrong with it?

Exposure to high levels of ammonia can increase the risk of injury.

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.

Source:

NHTSA, Recalls flat file. Released Oct 26, 2026. Updated daily.

  • NHTSA’s part: Engine and engine cooling: exhaust system: manifold/header/muffler/tail pipe.

What should you do?

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.

Source:

NHTSA, Recalls flat file. Released Oct 26, 2026. Updated daily.

  • How to reach the firm: 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.

Which ones are recalled?

NHTSA counts 494 items potentially involved, across everything this recall names.

  • Part no. 5432728
  • Part no. 5432732
  • Part no. 5432742
  • Part no. 5432746
  • Part no. 5432747
  • Part no. 5432748
  • Part no. 5432517
  • Part no. 5432521
  • Part no. 5432386
  • Part no. 5432390
  • Part no. 5432391
  • Part no. 5432392
  • Part no. 5432372
  • Part no. 5432376
  • Part no. 5432315
  • Part no. 5432319
  • Part no. 5432329
  • Part no. 5432333
  • Part no. 5432334
  • Part no. 5432335
  • Part no. 5432082
  • Part no. 5432086
  • Part no. 5432144
  • Part no. 5432145
  • Part no. 5432146
  • Part no. 5432147
  • Part no. 5431688
  • Part no. 5431692
  • Part no. 5431693
  • Part no. 5431694
  • Part no. 5431695
  • Part no. 5431696
  • Part no. 5431440
  • Part no. 5431441
  • Part no. 5431442
  • Part no. 5431443
  • Part no. 5431390
  • Part no. 5431391
  • Part no. 5431392
  • Part no. 5431393
  • Part no. 5431012
  • Part no. 5431013
  • Part no. 5431014
  • Part no. 5431015
  • Part no. 5479925
  • Part no. 5430999 5431377
  • Part no. 5431418
  • Part no. 5431689
  • Part no. 5432083
  • Part no. 5432316
  • Part no. 5432373
  • Part no. 5432518
  • Part no. 5432729
  • Part no. 5479938
  • Part no. 5479939
  • Part no. 5479940
  • Part no. 5479941
Source:

NHTSA, Recalls flat file. Released Oct 26, 2026. Updated daily.

  • Cummins L9NHTSA gives no dates made

Who is recalling it?

  • Made by Cummins, Inc..
Source:

NHTSA, Recalls flat file. Released Oct 26, 2026. Updated daily.

What the record doesn’t say

  • NHTSA’s recall file doesn’t say whether anyone was hurt.
  • Which ones, by part or lot: the recall’s report on NHTSA’s site gives them where the maker did; this file gives part numbers only where its maker listed them.
  • How many have been returned or fixed isn’t in the notice.
Source:

Hearth Record wrote these lines.

Sources

  • National Highway Traffic Safety Administration, Recalls flat file (FLAT_RCL_POST_2010).

    Released Oct 26, 2026 and checked Oct 26, 2026. Updated daily. Public domain (U.S. Government work).

Source:

Vehicle, car seat, tire and vehicle equipment recalls, owner complaints and crash ratings are from the National Highway Traffic Safety Administration (NHTSA). Copied on Oct 26, 2026.

How to read a record

Four things every record does, shown on an example record made up for this guide.

An example record, made up for this guide

An example nursing home

Made up for this guide: no real place is shown

Not fully inspected in over two years (CMS flag)

11 health citations at the latest inspection cycle

The state average is 14.3.

Source:

CMS, State and US Averages and Health Deficiencies. Released Oct 28, 2026. Updated monthly.

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Every fact names its source.

Who published it, when, and how often it changes sit beside each fact, with a link to the agency’s own file.

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