Electrical systemRecall 23V-423 · 2021–2023 Peterbilt 579
PACCAR Incorporated recall 23V-423 covers 4,967 2021–2023 Peterbilt 579 for a electrical system problem, reported to NHTSA on June 13, 2023. The manufacturer's latest report (2025 Q2) shows 86% of affected vehicles repaired.
Source: NHTSA recall 23V423000 and manufacturer quarterly reports. Started by the manufacturer.
The problem
PACCAR, Incorporated (PACCAR) is recalling certain 2021-2023 Peterbilt 579 vehicles equipped with MX-13 engines and 160-amp alternators. A fastener on the front spring bracket may have been installed with the head on the outside of the frame rail, which can chafe and damage the alternator positive cable.
The risk
A damaged alternator cable increases the risk of a fire.
The fix
Dealers will replace the frame fastener and secure the alternator cable, free of charge. Owner notification letters are expected to be mailed August 11, 2023. Owners may contact Peterbilt's customer service at 1-940-591-4220. PACCAR's number for this recall is 23PBD.
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.
How fast cars are being fixed
86%repaired
Share of affected vehicles repaired in each quarterly report the manufacturer filed with NHTSA. 402 vehicles were listed as unreachable.