2024 Kenworth L770 problems, complaints & recalls
Safety recalls (1)
Steering 2024-01-25 · campaign 24V044000 · 45,887 vehicles
Defect: PACCAR Incorporated (PACCAR) is recalling certain 2024-2025 Kenworth T280, T380, T480, T680, T880, L770, W990, and 2024-2025 Peterbilt 389, 520, 535, 536, 537, 548, 567, 579, 589 trucks. The steering gear assemblies may have been assembled incorrectly with fewer recirculating balls than are required, which may result in a loss of steering control.
Risk: A loss of steering control increases the risk of a crash.
Fix: Dealers will inspect and replace the steering gears as necessary, free of charge. Owner notification letters were mailed March 20, 2024. Owners may contact Peterbilt customer service at 1-940-591-4220 and/or Kenworth customer service at 1-425-828-5888. PACCAR's numbers for this recall are 24PBC and 24KWC.
Service bulletins (21)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Unknown Or Other 2026-10-28 · 99-050 · Service Bulletin/Repair Instructions
there is an update to the carb base emissions warranty limits table and manufacturer’s warranty coverage section in certain engine model year (emy) 2024-2026 px-7 and px-9 operator’s manuals.
Unknown Or Other 2026-10-13 · 15-031 · Service Bulletin/Repair Instructions
removed hyperlinks for bulletin migration
Engine 2026-09-11 · P001 · Service Bulletin/Repair Instructions
"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 weekly for vin changes. 10 chassis added to the chassis list."
Engine 2026-09-03 · P002 · Service Bulletin/Repair Instructions
"kw: a link to the paccar powertrain prognostics webcast has been added in the links section. pb: the chassis list has been updated to include 2 chassis. the total chassis count is now 4. a link to the paccar powertrain prognostics webcast has been added in the links section."
Engine 2026-08-27 · P002 · Service Bulletin/Repair Instructions
"kw: a link to the paccar powertrain prognostics webcast has been added in the links section. pb: the chassis list has been updated to include 2 chassis. the total chassis count is now 4. a link to the paccar powertrain prognostics webcast has been added in the links section."
Engine 2026-08-21 · 43-089 · Service Bulletin/Repair Instructions
this optional software update is expected to be available after 08/28/2026.
Showing the 6 most recent of 21 bulletins. Search all of them free at nhtsa.gov.
What owners report
No detailed complaint narratives on file.
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.