MCI D4505 2018: ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR

General Information

NHTSA Campaign ID Number: 20V352000

Make Model Year
MCI D4505 2018
Date Owners Notified Date Received by ODI Date Added to Database
2020-07-23 2020-06-12 2020-06-15

Manufacturers Involved: Motor Coach Industries

Manufacturer Campaign Number: SB 479

Component: ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR

Potential Number Of Units Affected: 1067

Report Initiator: MFR MFR Report

Summary

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.

Consequence

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.