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June 25, 2026 Warranty extension

"KW & PB 14 fuel injector part numbers (seven for MX-11 and seven for MX-13 engines) have been added to...

Kenworth technical service bulletin CE033 for 2023 Kenworth T680, 2023 Peterbilt 579 and 2023 Peterbilt 389 and others.

Bulletin number
CE033 (CE033)
Component
Power train
Summary
"KW & PB 14 fuel injector part numbers (seven for MX-11 and seven for MX-13 engines) have been added to this warranty policy."

Owners of these vehicles have filed 6 complaints in the transmission category.

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