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2021 Mci D4005 problems

Typical yearClose to a typical year
Owner complaints
0
Recalls
2
Service bulletins
8

The worst 2021 Mci D4005 problems

Ranked by number of owner complaints. Mileage and cost come from what owners wrote.

Problems by type

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Recalls 2

Visibility: glass, side/rearReported December 10, 2025 · 15,454 vehicles affected
What is wrong
Motor Coach Industries (MCI) is recalling certain 102DL3, 102D3, MC12PTV, E4500, D4000, 102D3ISTV, D4500, J4500, D4000ISTV, D4005, D4505, and J3500 transit buses. Please refer to MCI's recall report for specific model year information. The front door lower curb view glazing material is incorrect. As such, these vehicles fail to conform to Federal Motor Vehicle Safety Standard (FMVSS) number 205, "Glazing Materials."
Risk
The incorrect window glazing material may reduce the driver's visibility, increasing the risk of a crash.
Remedy
MCI will replace the glass, free of charge. Owner notification letters were mailed February 4, 2026. Owners may contact MCI customer service at 1‑800‑241‑2947. MCI's number for this recall is 22-005.

Recall number 25V853000 · Recall details

Fuel system, diesel: fuel injection system: fuel railReported December 15, 2021 · 1,125 vehicles affected
What is wrong
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.
Risk
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.

Recall number 21V971000 · Recall details

See all 2 recalls for the 2021 Mci D4005

Technical service bulletins for the 2021 Mci D4005 8

Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.

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Questions about the 2021 Mci D4005

Is the 2021 Mci D4005 reliable?

Owners have filed 0 complaints about the 2021 Mci D4005.

What is the most common problem with the 2021 Mci D4005?

There are not enough complaints to tell.

How many recalls does the 2021 Mci D4005 have?

2 recalls, covering visibility and fuel system, diesel.

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