2020 MCI J4500; 2019 MCI J4500; 2018 MCI J4500; 2019 MCI D45 CRT LE; 2018 MCI D45 CRT LE; 2020 MCI D45 CRT LE; 2018 MCI D4005; 2018 MCI D4500; 2018 MCI D4505; 2019 MCI D4505; 2019 MCI D4500; 2020 MCI D4500; 2019 MCI D4005; 2020 MCI D4005; 2020 MCI D4505; 2019 MCI D4000; 2020 MCI D4000; 2018 MCI D4000
Check against the official notice below — it lists the full affected range.
Motor Coach Industries is recalling certain 2018-2020 D4000, D4005, D4500, D4505, and D45CRTLE buses equipped with electric cooling fans, dual alternators, and Parker multiplex systems. The recalled vehicles can experience a buildup of debris, corrosion, and water that creates a high resistance path on the alternator's sense stud, causing the alternator to produce excessive voltage that may exceed the threshold programmed in the vehicle's multiplex module, potentially resulting in engine power loss and vehicle shutdown while in motion.
A loss of engine power while driving increases the risk of a crash. MCI will notify affected owners, and dealers will install a new application code in the Parker VMM multiplex modules to increase the overvoltage threshold limit at no charge. The recall began July 23, 2020. Owners should contact MCI customer service at 1-800-241-2947 for more information, referencing recall number SB 479.
Written by software from the official notice below. Not reviewed by a lawyer.
If the engine shuts down or loses power while the vehicle is in motion, this may increase the risk of a crash.
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.
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.
Republished from the official source above; details can change — the source record controls.