P003
Service Bulletin/Repair Instructions
For Peterbilt: Chassis list has been updated to include 1 chassis. The total chassis count is now 7. For Kenworth: Chassis list has been updated to include 1 chassis. The total chassis count is now 8.
Vehicle report
2027 PETERBILT 579
Service bulletins
4 bulletinsTechnical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
14-037
Service Campaign
An improved transmission bracket is now available for replacement on certain chassis equipped with a PACCAR TX-12 transmission, featuring a more durable design for enhanced long-term performance.
41-029
Service Bulletin/Repair Instructions
Incorrect air filters may be inadvertently installed in certain chassis equipped with under-hood Donaldson air filter housings.
99-052
Service Bulletin/Repair Instructions
There is an update to the Base Emissions Warranty Limits table [PR1.1]and general certification information in certain Engine Model Year (EMY) 2026 MX-11 and MX-13 Operator’s Manuals.
Reading this report
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.