Total Complaints
1 filings
PETERBILT 579 · model year
2021 PETERBILT 579
1 NHTSA complaints, and 9 active recalls for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 2021PETERBILT579 carries 1 consumer safety complaint in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 0 crashes, 0 fires, 0 injuries, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.
Component-level analysis is where model-year complaints become actionable: the top complaint category for the 2021 579 is electrical system with 1 filings. Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability. This model year has 9 active recall campaigns, which means the manufacturer is obligated to remedy the covered defect at no charge for the life of the vehicle, the full NHTSA campaign numbers are listed below.
NHTSA currently has 3 investigation files overlapping the 2021 579. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page, a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.
1
Complaints
0
Crashes
0
Fires
0
Injuries
0
Deaths
Crashes Reported
0 reports
Source
NHTSA ODI
Federal complaints database
Complaints vs. fleet median (215)
At or below the fleet median complaint volume.
Complaints by Component
| Component | Count |
|---|---|
| ELECTRICAL SYSTEM | 1 |
Recalls (9)
21V00N00029/12/2021
ELECTRICAL SYSTEM:WIRING
PACCAR Incorporated (PACCAR) is recalling certain 2016-2022 Peterbilt 567, 579, 2021-2022 Peterbilt 536, 2017-2021 Kenworth T880, 2016-2022 Kenworth T680, 2018-2020 Kenworth T440, 2020 Kenworth T270, and 2021 Kenworth T280 vehicles. The methane detection system will not function if the system loses
23V65300027/09/2023
FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY
PACCAR Incorporated (PACCAR) is recalling certain 2021-2024 Peterbilt 579 and 567 trucks. The U-bolts that attach the air tank to the chassis may contact the fuel tank and over time, wear a hole in the tank.
24V19000020/03/2024
POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:COLUMN SHIFT
PACCAR Incorporated (PACCAR) is recalling certain 2021-2024 Peterbilt 365, 367, 389, 535, 536, 537, 548, 567, 579, and 2021-2025 Kenworth T180, T280, T380, T480, T680, T880 and W990 trucks. The right-hand gear shifter stalk connectors may have been improperly crimped, resulting in a loss of communi
21V90600019/11/2021
SERVICE BRAKES, AIR
PACCAR Incorporated (PACCAR) is recalling certain 2019-2022 Kenworth T880, W990, Peterbilt 567, 579, 389, and 2022 Peterbilt 536, 537 wrecker and auto hauler vehicles. The work brake (winch brake) may unintentionally disengage the service brakes during winching operations, causing the vehicle to ro
21V64800019/08/2021
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS
PACCAR, Inc. (PACCAR) is recalling certain 2021-2022 Peterbilt 367, 389, 567, and 579 vehicles. The cross member mounted Hill Start Assist valve assembly may have insufficient clearance to the rear axle, causing damage to the rear brake hose and loss of the rear brake signal.
21V08000017/02/2021
ENGINE
PACCAR Incorporated (PACCAR) is recalling certain 2021-2022 Kenworth T680, T880, W990, T800, W900 and Peterbilt 579, 567, 389, 367 vehicles equipped with a Cummins X15 engine. The capscrews that attach the flywheel to the crankshaft may have been improperly torqued, allowing the flywheel to detach.
23V42300013/06/2023
ELECTRICAL SYSTEM
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
21V32800010/05/2021
SERVICE BRAKES, AIR:DISC:CHAMBER
PACCAR Incorporated (PACCAR) is recalling certain 2021 Peterbilt 348 and 579 vehicles. The spring brake chamber may have been assembled with incorrect springs that were out of specification, which may cause the pressure plate to shift.
24V91500009/12/2024
SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE
PACCAR Incorporated (PACCAR) is recalling certain 2021-2025 Peterbilt and Kenworth vehicles, equipped with Bendix EC80 Advanced Electronic Control Units (ECU). Please see the recall report for a complete list of models. Electrical noise and low signal to the power line carrier may cause the ECU to
Recent Complaints
20230114ELECTRICAL SYSTEM
I was driving on a freeway when suddenly my truck lost all power. I managed to coast to a safe spot to park. I immediately opened hood and started troubleshooting. Left key on so I'd know if power came back on. After about 10 minutes of moving wires gently I found the issue. A power wire plug connected to cab. I wiggled it and everything worked again. Messed up again and again, that day. Vehicle was still warrantied, but shops didn't have time to get it in. Finally I found a temporary solution. If I hold wire sideways after cutting zip ties it wouldn't mess up again. Shop said they must replace entire wire. Totally a safety issue. Could have resulted in bad situations if it happened at the wrong time.
Compare 2021PETERBILT579 to Similar Vehicles
NHTSA Investigations
Frequently Asked Questions
How many complaints does the 2021 PETERBILT 579 have?▼
The 2021 PETERBILT 579 has 1 NHTSA complaints, 0 crashes, 0 fires, 0 injuries, and 0 deaths reported.
Are there any recalls for the 2021 PETERBILT 579?▼
Yes, the 2021 PETERBILT 579 has 9 recall(s). The most common affected component is ELECTRICAL SYSTEM:WIRING. Recalls are issued by NHTSA and manufacturers must provide a free remedy.
What are the most common problems with the 2021 PETERBILT 579?▼
The most-complained component for the 2021 PETERBILT 579 is ELECTRICAL SYSTEM with 1 complaints. Other frequently reported areas include various components.
Is the 2021 PETERBILT 579 safe to buy?▼
Review the complaint history, crash and fire reports, safety ratings, and recall status on this page to make an informed decision. No NHTSA crash test rating is available for this model year. Compare with other model years using the links above.
Where does this data come from?▼
All complaint, recall, and safety rating data is sourced from the National Highway Traffic Safety Administration (NHTSA). Complaints are filed by vehicle owners through NHTSA's Office of Defects Investigation.
Vehicle Safety Guides
Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Read our methodology - how this data is sourced, computed, and verified.