EnginePart report
2020 Peterbilt 579 Engine Problems
- Complaints
- 1about this part
- Share
- 20%of 5 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the engine of the 2020 Peterbilt 579, 20% of the 5 complaints for this model year.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Related service bulletins
- 11037541Sep 11, 2026"Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes. 2 chassis added to the chassis list. Peterbilt: Dealers should check the chassis list and SIR…
- 11037451Sep 5, 2026An exhaust manifold slip joint seal kit is now available for EPA 2017-2024 PACCAR MX-13 engines.
- 11036289Aug 13, 2026The procedure has been updated to include additional steps for verifying the software level on the vehicle electronic control unit (VECU2) and digital display (DD). Steps have…
- 11035343Jul 25, 2026105 chassis have been removed from the chassis list and unflagged in PRWS due to expiration of applicable warranty coverage. Total chassis population is 732.
- 11035202Jul 21, 2026This optional software update is now available for chassis equipped with EMY 2021B-2023 PACCAR MX-11 and MX-13 engines. This update provides customers with additional time to…
- 11035149Jul 18, 2026Incorrect air filters may be inadvertently installed in certain chassis equipped with under-hood Donaldson air filter housings.
- 11035111Jul 10, 2026The Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to include the latest prognostics bulletin verbiage.
- 11035108Jul 7, 2026"The software is not yet available. The bulletin will be updated when more information is available."
- 11034394Jun 29, 2026"An optional software update will be available on 07/06/2026 for chassis equipped with EMY 2021B-2023PACCAR MX-11 and MX-13 engines. This update provides customers with…
- 11032876May 1, 2026Procedures have been updated to include additional truck models in the service intervals table.
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2020 | 1 | 20% |
| 2018 | 1 | 14% |
Other parts of the 2020 Peterbilt 579
Electrical system
2 complaintsTransmission and drivetrain
2 complaintsBrakes
1 complaintsElectronic stability control
1 complaintsForward collision avoidance
1 complaints
2 complaintsTransmission and drivetrain
2 complaintsBrakes
1 complaintsElectronic stability control
1 complaintsForward collision avoidance
1 complaints
← All problems reported for the 2020 Peterbilt 579
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology