Motor Coach Industries: Electrical System › Alternator/Generator/Regulator
Motor Coach Industries reported this defect to federal regulators on Jun 12, 2020 and put the number of vehicles at risk at 1,067. The repair is free for as long as the recall stands.
The defect
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.
The risk
If the engine shuts down or loses power while the vehicle is in motion, this may increase the risk of a crash.
The 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.
18 model years covered
Newest first| Vehicle | Complaints | Recalls | Fires | Crashes |
|---|---|---|---|---|
| 2020 Mci D4000 | 0 | 1 | 0 | 0 |
| 2020 Mci D4005 | 0 | 4 | 0 | 0 |
| 2020 Mci D4500 | 0 | 8 | 0 | 0 |
| 2020 Mci D4505 | 0 | 7 | 0 | 0 |
| 2020 Mci D45crtle | 0 | 8 | 0 | 0 |
| 2020 Mci J4500 | 0 | 9 | 0 | 0 |
| 2019 Mci D4000 | 0 | 1 | 0 | 0 |
| 2019 Mci D4005 | 0 | 5 | 0 | 0 |
| 2019 Mci D4500 | 0 | 8 | 0 | 0 |
| 2019 Mci D4505 | 0 | 8 | 0 | 0 |
| 2019 Mci D45crtle | 0 | 7 | 0 | 0 |
| 2019 Mci J4500 | 0 | 12 | 0 | 0 |
| 2018 Mci D4000 | 0 | 4 | 0 | 0 |
| 2018 Mci D4005 | 0 | 5 | 0 | 0 |
| 2018 Mci D4500 | 0 | 7 | 0 | 0 |
| 2018 Mci D4505 | 0 | 7 | 0 | 0 |
| 2018 Mci D45crtle | 0 | 5 | 0 | 0 |
| 2018 Mci J4500 | 0 | 13 | 0 | 0 |
What this page is, and what to do next
A recall is not an opinion. It is a Part 573 report a manufacturer is required by federal law to file once it decides a defect poses an unreasonable risk to safety, and it commits them to repairing the vehicle at no cost to the owner. The three passages above are the manufacturer’s own wording as published by NHTSA.
This page describes the campaign. It cannot tell you whether one particular car has already been through the shop — that is tracked by VIN, and only the manufacturer knows it. Check yours at nhtsa.gov/recalls or with a franchised dealer, quoting campaign number 20V352000.
Full record for the 2020 Mci D4000 → · Recalls carrying a do-not-drive advisory → · Where this data comes from →