RecallPulseUpdated Oct 9, 2026

2023 Mack MD: Engine And Engine Cooling recall

NHTSA campaign 22V606000 · 150 units potentially affected · filed Aug 9, 2022

What's wrong

Mack Trucks, Inc. (Mack) is recalling certain 2023 MD6/7 trucks. The engine control module (ECM) may experience an internal short-circuit, which can result in an unexpected engine shut down.

Why it matters

An unexpected engine shut down can increase the risk of a crash.

The fix

Cummins will replace the ECM, free of charge. Owner notification letters were mailed on September 27, 2022. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0438.

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.nhtsa.gov.

Recall details

NHTSA campaign
22V606000
Manufacturer no.
SC0438
Manufacturer
Mack Trucks, Inc.
Component
ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
Units affected
150
Report received
Aug 9, 2022
Owner letters
Sep 27, 2022
Type
Vehicle

Check whether your vehicle is included with the official NHTSA VIN lookup or your dealer. Repairs for safety recalls are free.

Vehicles covered