Hearth Record

Fuel system, diesel: fuel injection system: fuel rail (Cummins)

Vehicle equipment recall 21E-032. NHTSA received Cummins, Inc.’s report on Apr 20, 2021.

NHTSA’s own record, on nhtsa.gov

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The short answer

NHTSA received Cummins, Inc.’s report on Apr 20, 2021. Copied from NHTSA on Oct 20, 2026.

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

What’s wrong with it?

A fuel leak in the presence of an ignition source increases the risk of a fire.

Cummins, Inc.

(Cummins) is recalling certain L9 part number D0K3003BX03 and ISX12 part number D563025BX03 diesel engines.

The sealing washer may not seat correctly in the pilot bore holes, allowing the high pressure fuel rail assembly to leak.

Source:

NHTSA, Recalls flat file. Released Oct 20, 2026. Updated daily.

  • NHTSA’s part: Fuel system, diesel: fuel injection system: fuel rail.

What should you do?

Dealers will inspect the rail threads and fuel lines, and replace the rail as necessary, free of charge. Owner letters were mailed July 30, 2021. Owners may contact Cummins customer service at 1-800-286-6467.

Source:

NHTSA, Recalls flat file. Released Oct 20, 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.safercar.gov.

Which ones are recalled?

NHTSA counts 45,334 items potentially involved, across everything this recall names.

  • Part no. 4307377
  • Part no. 4307034
Source:

NHTSA, Recalls flat file. Released Oct 20, 2026. Updated daily.

  • Cummins ISX12NHTSA gives no dates made
  • Cummins L9NHTSA gives no dates made

Who is recalling it?

  • Made by Cummins, Inc..
Source:

NHTSA, Recalls flat file. Released Oct 20, 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 20, 2026 and checked Oct 20, 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 20, 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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