Mack Anthem An (4), Pioneer PR (4): Exterior lighting — turn signal

Affects Mack Anthem An (4), Pioneer PR (4) · 2025–2027 — about 86 vehicles.

The hazard

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.

What to do

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.

Critical — crash/injury risk now High — injury risk; see remedy Moderate — fix at next service Low — minor / informational