CarRecallWatch- Component
- ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR
- Problem
- 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.
- 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.
What this recall means for you
Certain buses have an alternator wiring problem. Debris, corrosion, or water can create a high-resistance path to ground at the alternator's sense stud, causing the alternator to put out excessive voltage. This can exceed the limit programmed into the vehicle's multiplex module, leading to a loss of engine power and vehicle shutdown.
If the engine shuts down or loses power while the bus is moving, the risk of a crash increases. Owners should take this seriously and arrange service promptly.
The remedy is free at an authorized dealer, where a technician will install a new application code in the Parker VMM multiplex modules that raises the overvoltage threshold. Owners can contact Motor Coach Industries customer service at 1-800-241-2947 (recall SB 479), and should check their VIN for open recalls.
Check whether this recall is open on your vehicle
Official recall notice
Affected vehicles
| MCI D4000 | 201820192020 |
|---|---|
| MCI D4005 | 201820192020 |
| MCI D45 CRT LE | 201820192020 |
| MCI D4500 | 201820192020 |
| MCI D4505 | 201820192020 |
| MCI J4500 | 201820192020 |