OFFICIAL CAMPAIGN FILE

NHTSA campaign 20V352000

NHTSA campaign 20V352000 covers 16 published year-and-model reports from 1 makes in this index and lists 1,067 potentially affected units campaign-wide. VIN eligibility must be checked separately.

Report received June 12, 2020 · Snapshot September 21, 2026

01 / DEFECT RECORD

What NHTSA campaign 20V352000 says

NHTSA campaign 20V352000 identifies ELECTRICAL SYSTEM and states that If the engine shuts down or loses power while the vehicle is in motion, this may increase the risk of a crash.

Defect 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 summary

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

02 / CORRECTIVE ACTION

Remedy for NHTSA campaign 20V352000

For NHTSA campaign 20V352000, the filed corrective action says: 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.

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.

Owner notification: July 23, 2020
Filing manufacturer: Motor Coach Industries
Component groups: ELECTRICAL SYSTEM

03 / PUBLISHED VEHICLES

Vehicles listed under NHTSA campaign 20V352000

RecallRoad links 16 year-and-model reports associated with NHTSA campaign 20V352000; the list reflects published source rows, not individual VIN coverage.