NHTSA vehicle safety data

2020 MCI D4000 Recalls, Ratings & Complaints

The 2020 MCI D4000 has 1 NHTSA recall campaign and 0 owner complaints on file as of October 16, 2026. Recall repairs are usually free at an authorized MCI dealer.

NHTSA recall and complaint data for the 2020 MCI D4000. Recall data is refreshed daily from NHTSA.

ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR

NHTSA #20V352000

Reported June 12, 2020 · Motor Coach Industries

Potentially affected: 1,067 vehicles

Defect description

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.

Safety consequence

If the engine shuts down or loses power while the vehicle is in motion, this may increase the risk of a crash.

Manufacturer 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.

Notes

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.

Other MCI D4000 model years

Check your 2020 MCI D4000 VIN

Not every recall applies to every VIN in a given year. Enter the 17-character VIN from your MCI D4000 at nhtsa.gov/recalls to see whether your specific vehicle has an unrepaired recall.

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