Free Preview
#BS-2021-PET579-D9152021 Peterbilt 579
Based on reports from 1 owners and 9 recalls for this exact model.
Preliminary Verdict
Green Light
Based on 1 complaints, 0 crashes, 0 fires, and 9 recalls.
Preview: What's in your full report
Each card shows a real sample from your report — unlock all 10 sections from $1.20
Mechanic Inspection Checklist
1 owners reported electrical issues.
30,000-Mile Cost Projection
Best Case
Most Likely
Worst Case
Top cost driver: Electrical (1 reports).
Also in your report
Owner Intelligence
AI-synthesized themes from real complaints
Buyer Lot Checklist
Questions, test drive checks, walk-away triggers
Negotiation Talking Points
Data-backed dollar deductions
Buy / Skip Verdict
Final recommendation with conditions
Where the complaints fall
2021 Peterbilt 579: Known Issues & Problem Areas
Electrical Issues
Electrical complaints account for 100% of all reports filed for the 2021 Peterbilt 579, with 1 owners filing complaints with NHTSA.
Data sourced from NHTSA owner complaints and community reports. The full report analyzes severity, repair costs, and failure patterns for each category.
Don't negotiate blind — know what this car costs to own
Repair costs • Negotiation scripts • Mechanic checklist • Buy/skip verdict
Recall History (9 recalls)
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 power.
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.
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.
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.
ELECTRICAL SYSTEM:SOFTWARE
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 roll.
+ 4 more recalls in the full report
Recall severity analysis & seller scripts
The full report rates each recall's severity and gives you scripts for asking the seller about recall completion.
About this data
NHTSA Complaints
Federal database of owner-filed safety complaints. 1 records for this vehicle.
NHTSA Recalls
Manufacturer-issued safety recalls. 9 recalls found for this vehicle.
Repair Cost Data
Real-world repair costs from owner reports and independent databases.
Other Peterbilt 579 Model Years
View all Peterbilt 579 years →2021 Peterbilt 579: Frequently Asked Questions
What is the most common problem with the 2021 Peterbilt 579?
Is the 2021 Peterbilt 579 reliable?
How much does it cost to fix 2021 Peterbilt 579 problems?
Does the 2021 Peterbilt 579 have any recalls?
What mileage do Peterbilt 579 problems start?
What’s in the full report?
How is this different from free NHTSA data?
How is this different from Carfax?
What if the report isn’t useful?
Get the Full 2021 Peterbilt 579 Report
10 sections of AI analysis based on 1 owner reports. Know before you buy.