Mack Trucks, Inc.: Exterior Lighting › Turn Signal
Mack Trucks, Inc. reported this defect to federal regulators on Apr 1, 2026 and put the number of vehicles at risk at 86. The repair is free for as long as the recall stands.
The defect
Mack Trucks, Inc. (Mack) is recalling certain 2025-2027 Pioneer (4) and 2027 Anthem (4) trailers. The trailer turn signals may not function properly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."
The risk
Turn signals that do not function properly may fail to indicate the driver's intention to change vehicle direction, increasing the risk of a crash.
The remedy
Dealers will update the turn signal indicator software, free of charge. Owner notification letters were mailed May 7, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0493. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov April 1, 2026.
4 model years covered
Newest first| Vehicle | Complaints | Recalls | Fires | Crashes |
|---|---|---|---|---|
| 2027 Mack Anthem AN (4) | 0 | 6 | 0 | 0 |
| 2027 Mack Pioneer PR (4) | 0 | 6 | 0 | 0 |
| 2026 Mack Pioneer PR (4) | 0 | 9 | 0 | 0 |
| 2025 Mack Pioneer PR (4) | 0 | 12 | 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 26V207000.
Full record for the 2027 Mack Anthem AN (4) → · Recalls carrying a do-not-drive advisory → · Where this data comes from →