Model yearDo not drive

2025 Kenworth L770

Body and fuel not decoded. Owner complaints on file from no date to no date.

Recall campaigns covering this model year3110k vehicles or units across those campaigns
Owner complaints0Not enough peers on file
Severity indexNoneCrash, fire, injury or death per 100
First 24 months0Complaints in its first two years
Complaints over time

Complaints about the 2025 Kenworth L770 by year filed

Owner complaints about this model year, by the year they were filed with NHTSA.

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Source: NHTSA ODI complaints file. The lighter column runs through October.
Components

Complaints by component

Owner complaints by component. Hover or focus a bar for the crash, fire, injury or death count.

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Source: NHTSA ODI complaints file. A complaint can name more than one component; it is counted under the first.
Recalls

3 recall campaigns cover the 2025 Kenworth L770

Check a specific vehicle by VIN on NHTSA's site: a campaign may cover only part of a model year's production.

Recall campaigns for the 2025 Kenworth L770
CampaignFiledSubjectComponentVehiclesRemedy
25V-436Jun 26, 2025Tail brake light, upper and lower beam headlights, reverse light, and turn signal may not illuminate as intendedLighting56,260Software update
24V-433Jun 12, 2024Tie rod or drag link assembly may contain an improperly heat-treated ball stud, causing the ball stud to breakDo not driveSteering7,410Part replacement
24V-044Jan 25, 2024Steering gear assemblies may have been assembled incorrectly with fewer recirculating balls than are required, which may result in a loss of…Steering45,887Part replacement
Source: NHTSA ODI recalls file.
Owner complaints

What owners reported about the 2025 Kenworth L770

The full text of every complaint filed with NHTSA about this model year, newest first. Complaints are filed by owners and are not verified by NHTSA; NHTSA removes personal details before publishing.

0 complaints on file.

    Source: NHTSA ODI complaints file.
    Investigations

    NHTSA has not opened an investigation on this model year

    Source: NHTSA ODI investigations file.
    Service bulletins

    23 manufacturer communications cover this model year

    Technical service bulletins and other notices the manufacturer sent to dealers. A bulletin is not a recall.

    • P001 Sep 11, 2026 · 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."
    • P002 Sep 3, 2026 · 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 i…
    • P002 Aug 27, 2026 · 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 i…
    • 43-089 Aug 21, 2026 · Service Bulletin/Repair Instructions
      This optional software update is expected to be available after 08/28/2026.
    • 24KWC/24PBC Aug 13, 2026 · Service Bulletin/Repair Instructions
      Updated Sheppard Steering Gear Classification Tool link in Inspection Procedure
    • 43-089 Aug 13, 2026 · Service Bulletin/Repair Instructions
      This optional software update is expected to be available in late August 2026 for chassis equipped with EPA 2024 EMY 2024-2026 PACCAR MX-11 and MX-13 engines. This bulletin will be updated when the software is ready. This update provides customers with addi…
    • 43-089 Aug 13, 2026 · Service Bulletin/Repair Instructions
      This optional software update is expected to be available in late August 2026 for chassis equipped with EPA 2024 EMY 2024-2026 PACCAR MX-11 and MX-13 engines. This bulletin will be updated when the software is ready. This update provides customers with addi…
    • 43-088 Aug 13, 2026 · Service Bulletin/Repair Instructions
      The procedure has been updated to include additional steps for verifying the software level on the vehicle electronic control unit (VECU2) and digital display (DD). Steps have also been added to the PACCAR Common Rail Injection 2 (PCI2) software verification.
    • 43-089 Aug 1, 2026 · Service Bulletin/Repair Instructions
      This optional software update is expected to be available on 08/07/26 for chassis equipped with EPA 2024 EMY 2024-2026 PACCAR MX-11 and MX-13 engines. This update provides customers with additional time to service their trucks before a DEF-related derate oc…
    • 43-088 Jul 21, 2026 · Service Bulletin/Repair Instructions
      This optional software update is now available for chassis equipped with EMY 2021B-2023 PACCAR MX-11 and MX-13 engines. This update provides customers with additional time to service their trucks before a DEF-related derate occurs. The software is being off…
    • 43-089 Jul 21, 2026 · Service Bulletin/Repair Instructions
      An optional software update is expected to be available on or after 07/31/26 for chassis equipped with EPA 2024 engine model year (EMY) 2024-2026 PACCAR MX-11 and MX-13 engines. This update provides customers with additional time to service their trucks bef…
    • E318 Jul 10, 2026 · Service Bulletin/Repair Instructions
      The Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to include the latest prognostics bulletin verbiage. The Warranty section has also been updated to include Peterbilt specific SRT codes for filing cross-divi…
    • 43-088 Jul 7, 2026 · Service Bulletin/Repair Instructions
      "The software is not yet available. The bulletin will be updated when more information is available."
    • 43-088 Jun 29, 2026 · Service Bulletin/Repair Instructions
      "An optional software update will be available on 07/06/2026 for chassis equipped with EMY 2021B-2023PACCAR MX-11 and MX-13 engines. This update provides customers with additional time to service theirtrucks before a DEF-related derate occurs. The software …
    • 99-051 May 18, 2026 · Emissions
      There is an update to the CARB Base Emissions Warranty Limits table and Manufacturer’s Warranty Coverage section in certain Engine Model Year (EMY) 2025 MX-11 and MX-13 Operator’s Manuals.
    • E326 Apr 1, 2026 · Emissions
      EPA17-24 MX Fuel Injector Connector - This bulletin has been revised to include all EPA17-24 and CARB24 PACCAR MX engines.
    • 24KWC/PBC Mar 28, 2026 · Service Bulletin/Repair Instructions
      Sheppard Recall Update March 2026 - The Parts section has been updated with revised steps for opening a TCS365 Order Support – Order Inquiry case.
    • 25PACF Dec 23, 2025 · Service Bulletin/Repair Instructions
      Parts and procedures are now available for all affected chassis equipped with Vehicle Electronic Control Unit (VECU) part number Q21-1157-013-011 / Q21-1157-013-013 / Q21-1157-002-002 / Q21-1157-004-004 / Q21-1157-006-006 / Q21-1157-009-009. See attached Pa…
    • 15-034 Dec 23, 2025 · Service Bulletin/Repair Instructions
      Certain Kenworth L770 and Peterbilt Model 520 chassis may encounter a slight increase in effort in the right-hand steering shaft when turning the wheel.
    • 25PACF Aug 1, 2025 · Service Campaign
      Procedures are now available for Phase 1 chassis equipped with Internal Combustion Engines (ICE) and Vehicle Electronic Control Unit (VECU) part number Q21-1157-013-011 / Q21-1157-013-013. Parts and procedures for Phase 2 chassis will be available at a late…
    • CE033 Jul 3, 2025 · Warranty Program/Extension
      32 fuel injector part numbers (16 for MX-11 and 16 for MX-13) have been added to this warranty policy.
    • E323 Jul 2, 2025 · Service Bulletin/Repair Instructions
      A required spacer tool set is now available to streamline the injector replacement process. The spacer tool set allows certain fuel system components to be loosened instead of removed to provide access to the injectors. See Bulletin 98-031 for details. Tool…
    • 24KWC Feb 12, 2024 · Service Bulletin/Repair Instructions
      Safety Recall Inspection procedures are available. Steering gear serial numbers must be inspected to determine suspect gears. Certain steering gears may have been assembled incorrectly, causing the gear to fracture. This can cause a loss of steering contro…
    Source: NHTSA manufacturer communications files.