2012 Kenworth C500 technical service bulletins

Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.

• Oct 13, 2026 Service bulletinDue to supplier constraints, an authorized aftermarket surge tank has been made available.
• Sep 11, 2026 Service bulletinKenworth: Dealers should check the chassis list and SIR weekly for VIN changes
• Apr 9, 2024 Service bulletinCertain C500/T440/T470/T660/T680/T800/T880/W900 chassis may have air tank reservoirs that do not meet air...
• Feb 10, 2021 Service bulletinInformation Only – Windshield washer pumps have a high No Trouble Found rate
• Dec 18, 2020 Service bulletinFix-As-Fail
• Jun 8, 2020 Service bulletinInformation Only:
• Mar 17, 2020 Service bulletinInformation Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment...
• Mar 3, 2020 Service bulletinInformation Only – Vehicles may have the connector seals on the wheel speed sensor incorrectly installed,...
• Dec 18, 2019 Service bulletinInformation Only
• Nov 6, 2019 Service bulletinInformation Only:
• Sep 27, 2019 Service bulletinInformation Only –
• Oct 26, 2012 Service bulletinKenworth: correction on listed chassis, after neway suspension control arm pivot joint bolt torque was...
• Jul 2, 2012 Service bulletinKenworth: diagnostics indicate failed fuel level sensor function in repairs and before component is...
• Apr 20, 2012 Service bulletinKenworth: the chassis may not have the proper assembly controls in place for draglink connections torque
• May 11, 2011 Service bulletinPaccar service bulletin: the hydraulic hose may have been improperly routed