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#BS-2020-PET579-D9152020 Peterbilt 579
Based on reports from 4 owners and 6 recalls for this exact model.
Preliminary Verdict
Green Light
Based on 4 complaints, 0 crashes, 0 fires, and 6 recalls.
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Mechanic Inspection Checklist
1 owners reported stability control issues — failures commonly reported around 350K miles.
30,000-Mile Cost Projection
Best Case
Most Likely
Worst Case
Top cost driver: Stability Control (1 reports).
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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
2020 Peterbilt 579: Known Issues & Problem Areas
Stability Control Issues
Stability Control complaints account for 25% of all reports filed for the 2020 Peterbilt 579, with 1 owners filing complaints with NHTSA. The median mileage at time of complaint is 349,571 miles, suggesting issues tend to surface around the 350K-mile mark.
Brakes Issues
Brakes complaints account for 25% of all reports filed for the 2020 Peterbilt 579, with 1 owners filing complaints with NHTSA. Owners should pay attention to brakes-related symptoms during test drives and pre-purchase inspections.
Forward Collision Avoidance: Automatic Emergency Braking Issues
Forward Collision Avoidance: Automatic Emergency Braking complaints account for 25% of all reports filed for the 2020 Peterbilt 579, with 1 owners filing complaints with NHTSA. Owners should pay attention to forward collision avoidance: automatic emergency braking-related symptoms during test drives and pre-purchase inspections.
Electrical System:instrument Panel:speedometer/odometer Issues
Electrical System:instrument Panel:speedometer/odometer complaints account for 25% of all reports filed for the 2020 Peterbilt 579, with 1 owners filing complaints with NHTSA. Owners should pay attention to electrical system:instrument panel:speedometer/odometer-related symptoms during test drives and pre-purchase inspections.
Data sourced from NHTSA owner complaints and community reports. The full report analyzes severity, repair costs, and failure patterns for each category.
Complaint trend by year
Complaints filed with NHTSA by year for the 2020 Peterbilt 579. Recent trend: decreasing.
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Repair costs • Negotiation scripts • Mechanic checklist • Buy/skip verdict
Recall History (6 recalls)
VISIBILITY:REARVIEW MIRRORS/DEVICES:EXTERIOR
PACCAR Incorporated (PACCAR) is recalling certain 2020 Peterbilt 520 and 579 vehicles and Kenworth T680, T880 and W990 vehicles. The mirror glass may detach from the mirror carrier plate due to inadequate adhesion.
VISIBILITY
PACCAR Incorporated (PACCAR) is recalling certain 2020 Peterbilt 579 vehicles equipped with a sleeper box. The conspicuity tape may have been installed in the incorrect location, affecting the vehicle's visibility to other drivers on the road. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 108, "Lamps, Reflective Devices, and Associated Equipment."
ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES
PACCAR Incorporated (PACCAR) is recalling certain 2015-2020 Peterbilt 365, 389, 567, and 579 vehicles equipped with a left-hand under hood jumper terminal (option code 2539410). The positive battery jumper terminal cable may be too long, allowing it to chafe against the left front suspension spring and result in an electrical short circuit.
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.
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.
+ 1 more recall 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. 4 records for this vehicle.
NHTSA Recalls
Manufacturer-issued safety recalls. 6 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 →2020 Peterbilt 579: Frequently Asked Questions
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10 sections of AI analysis based on 4 owner reports. Know before you buy.