2019 Mci D4000 Problems: 0 Complaints, 1 Recall

The worst 2019 Mci D4000 problems

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

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Electrical system: alternator/generator/regulatorReported June 12, 2020 · 1,067 vehicles affected

What is wrong: Motor Coach Industries (MCI) is recalling certain 2018-2020 D4000, D4005, D4500, D4505 and D45CRTLE buses manufactured with electric cooling fans (E-fan) for the radiator and charge air cooler, Borg Warner 55SI model dual alternator configuration (with a sense stud and wire), and Parker Vansco Multiplexing Module (VMM) Multiplex system. A build-up of debris, corrosion, and/or water flow could cause a high resistance path to ground for the sense stud on the back of the alternator and cause the alternator to produce excessive voltage output, which may exceed the threshold limit currently programmed in the VMM and result in a loss of engine power and vehicle shutdown.
Risk: If the engine shuts down or loses power while the vehicle is in motion, this may increase the risk of a crash.
Remedy: MCI will notify the affected owners, and dealers will install a new application code in the Parker VMM multiplex modules increasing the overvoltage threshold limit, free of charge. The recall began July 23, 2020. Owners may contact MCI customer service at 1‑800‑241‑2947. MCI's number for this recall is SB 479.

Recall number 20V352000 · Recall details

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

Used buying checklistWhat to check on a 2019 Mci D4000 before you buy

Is the 2019 Mci D4000 reliable?

Owners have filed 0 complaints about the 2019 Mci D4000.

What is the most common problem with the 2019 Mci D4000?

There are not enough complaints to tell.

How many recalls does the 2019 Mci D4000 have?

1 recall, covering electrical system.

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