The Recall Desk
Our severity:HighNHTSA·25V622000·Announced 2025-09-18

Mack Recalls 2025-2026 Pioneer Trucks for Trailer Light Failure

Mack Trucks is recalling 2025-2026 Pioneer vehicles because trailer lights may fail to illuminate when towing, increasing crash risk.

What this means for you

Our assessment, not the agency’s: severity 3/5 (High).

Real risk of harm even if no illness or injury has been reported yet. Stop using the product and follow the agency's guidance.

Our severity reasoning: The recall involves a risk-of-harm product (vehicle lighting failure) where injury has not yet been reported, fitting the 'High' severity criteria.

Plain-English summary

Mack Trucks, Inc. is recalling certain 2025-2026 Pioneer vehicles. The recall addresses a defect in the body control module, which may cause trailer lights to fail to illuminate when towing a trailer.

Trailer tail lights and turn signals that do not illuminate as intended can reduce visibility to other drivers, increasing the risk of a crash. The defect is attributed to an improperly manufactured body control module.

Dealers will replace the trailer body input/output module free of charge. Owner letters were mailed on November 19, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0484. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning September 25, 2025.

The recalled product

Product
MACK PIONEER PR (4)
Brand
MACK
Manufacturer
Mack Trucks, Inc.
Category
Vehicle — Truck
Hazard
Affected units
156

Is your product affected?

Check your packaging against the codes below. If any of them match, the product is part of this recall.

Model numbers (1)

  • PIONEER PR (4)

Distribution

Distributed nationwide across the United States.

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