2012 Kenworth T440 technical service bulletins

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

• Sep 11, 2026 Service bulletinKenworth: Dealers should check the chassis list and SIR weekly for VIN changes
• 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 –
• Feb 4, 2014 Service bulletinTech Tip concerning Kenworth Vehicle Configuration May Allow the Engine to Start in Range
• Jul 2, 2012 Service bulletinKenworth: diagnostics indicate failed fuel level sensor function in repairs and before component is...
• Sep 16, 2011 Service bulletinKenworth: the front axle u bolts were manufactured on certain T3 and T4 series trucks with insufficient...
• Sep 12, 2011 Service bulletinKenworth: on certain trucks, the eaton transmissions may be susceptible to having water intrusion which...