Does the 2021 MCI D4000 have any recalls?

1 recall found in NHTSA data as of September 22, 2026, covering: fuel system, diesel. Recalls apply to the model and year; whether a particular vehicle is included, and whether it has been repaired, depends on its VIN.

How do I check if my 2021 MCI D4000 recall has been fixed?

Enter your 17-character VIN at nhtsa.gov/recalls, or ask a MCI dealer. Recall repairs are free. NHTSA's VIN search doesn't list recalls that were already repaired.

How many complaints have owners filed about the 2021 MCI D4000?

0 complaints filed with NHTSA. Complaints are unverified reports from the public that NHTSA uses to decide what to investigate.

2021 MCI D4000 recalls

Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.

1 recall found in NHTSA data as of September 22, 2026

For the 2021 MCI D4000. These apply to the model and year, not to one particular vehicle: check your VIN to see whether yours is included and whether it has been repaired.

Has your MCI been repaired?

Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.

Check your VIN with NHTSA

NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A MCI dealer can also check your VIN. Recall repairs are free.

2021 MCI D4000 recalls, newest first

December 15, 2021NHTSA 21V9710001,125 vehicles potentially affected

Fuel system, diesel › Fuel injection system › Fuel rail

Summary: Motor Coach Industries (MCI) is recalling certain 2019-2022 D4000 ISTV, D4500, 2021 D4000, D4520, 2020-2021 D4505, D4005, 2020-2022 D45CRTLE, and 2019-2021 J4500 vehicles equipped with certain Cummins X12 diesel engines. The fuel tubes between the fuel rail and the injectors for cylinders four, five, and six may fatigue and crack, which can result in a high pressure fuel leak.
Consequence: A high pressure fuel leak in the presence of an ignition source can increase the risk of a fire.
Remedy: On engines with 75 miles or less, Cummins dealers will install vibration isolators to the fuel tubes. Engines with more than 75 miles will receive new fuel tubes with vibration isolators. Repairs will be performed free of charge. Owner notification letters were mailed March 11, 2022. Owners may contact MCI customer service at 1-800-241-2947. MCI's number for this recall is R21-028.

This recall on nhtsa.gov

Owner complaints

No owner complaints about the 2021 MCI D4000 were found in NHTSA’s complaint data.

Other 2021 MCI models

Most recalled 2021 vehicles

2021 Ford F-150 (29 recalls)
2021 Lincoln Aviator (28 recalls)
2021 Ford Explorer (26 recalls)
2021 Blue Bird Vision School Bus (26 recalls)
2021 Tesla Model X (24 recalls)

All of 2021’s most recalled vehicles

Questions

Does the 2021 MCI D4000 have any recalls?: 1 recall found in NHTSA data as of September 22, 2026, covering: fuel system, diesel. Recalls apply to the model and year; whether a particular vehicle is included, and whether it has been repaired, depends on its VIN.
How do I check if my 2021 MCI D4000 recall has been fixed?: Enter your 17-character VIN at nhtsa.gov/recalls, or ask a MCI dealer. Recall repairs are free. NHTSA's VIN search doesn't list recalls that were already repaired.
How many complaints have owners filed about the 2021 MCI D4000?: 0 complaints filed with NHTSA. Complaints are unverified reports from the public that NHTSA uses to decide what to investigate.