The Used Car Index

2026 Kenworth L770 problems

No complaints are listed for the 2026 Kenworth L770. NHTSA's API and bulk file list none in this build.

Data build 2026-10-09.

NHTSA lists this vehicle as KENWORTH L770.

At a glance

Complaints
0
With crash
0
With fire
0
With injury (complaints)
0
Injuries
0
Deaths
0
Recalls
2
Do not drive recalls
0
Park outside recalls
0
Recall potential units (maximum)
56,260
Investigations
0
Open investigations
0
Manufacturer communications
13

Complaints per 100k sold unavailable. No sales source is available for this record.

Model-generated complaint tags: No complaints are listed for tagging.

Recalls

See new recalls and investigations this week.

2 recalls.

26V022000

Date: 2026-01-19. Systems: STEERING.

Defect: PACCAR Incorporated (PACCAR) is recalling certain 2026 Kenworth L770 and 2024-2026 Peterbilt 520 vehicles. The right-hand stand-up (RHSU) configuration on the steering cross-shaft may become stressed and fail.

Consequence: A steering cross-shaft that fails can cause a loss of steering control, increasing the risk of a crash.

Remedy: Dealers will inspect and repair the steering cross-shafts and replace any damaged or broken cross-shafts, free of charge. Owner notification letters were mailed March 13, 2026. Owners may contact Peterbilt's customer service at 1-940-591-4220 and Kenworth's customer service at 1-425-828-5888. PACCAR's number for this recall is 26PACA.

Do not drive: No. Park outside: No.

25V436000

Date: 2025-06-26. Systems: EXTERIOR LIGHTING.

Defect: PACCAR Incorporated (PACCAR) is recalling certain 2024-2026 Kenworth T480, T680, T880, W990, Peterbilt 520, 536, 537, 548, 567, 579, 589, 2025 Kenworth T180, Peterbilt 535, 2025-2026 Kenworth T280, T380 and L770 vehicles. The tail brake light, upper and lower beam headlights, reverse light, and turn signal may not illuminate as intended. In addition, the lift axles, if lowered, may revert to a rai (excerpt)

Consequence: Delayed and unsteady headlights can result in insufficient illumination of the road, decreasing the driver's visibility and increasing the risk of a crash. In addition, an unexpected position change of the lift axles may increase the risk of injury. (excerpt)

Remedy: Dealers will update the VCU software, free of charge. Owner letters were mailed August 19, 2025. Owners may contact Kenworth's customer service at 1-425-828-5888 and Peterbilt's customer service at 1-940-591-4220. PACCAR's number for this recall is 25PACF. (excerpt)

Do not drive: No. Park outside: No.

Investigations

0 investigations; 0 open.

Manufacturer communications

13 manufacturer communications.

Communications by system
SystemCount
ENGINE7
STEERING3
ELECTRICAL SYSTEM2
EXTERIOR LIGHTING2
UNKNOWN OR OTHER1

11037541

Date: 2026-09-11. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.

"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."

11036342

Date: 2026-08-21. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.

This optional software update is expected to be available after 08/28/2026.

11036292

Date: 2026-08-13. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.

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 additional time to service their trucks before

11036293

Date: 2026-08-13. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.

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 additional time to service their trucks before

11036296

Date: 2026-08-13. Type: Service Bulletin/Repair Instructions. Systems: STEERING.

Updated Sheppard Steering Gear Classification Tool link in Inspection Procedure

11035433

Date: 2026-08-01. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.

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 occurs. The software is being offered to cust

11035151

Date: 2026-07-21. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM, ENGINE.

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 before a DEF-related derate occurs. The softwa

11035095

Date: 2026-07-02. Type: Service Bulletin/Repair Instructions. Systems: UNKNOWN OR OTHER.

There is an update to the Base Emissions Warranty Limits table [PR1.1]and general certification information in certain Engine Model Year (EMY) 2026 MX-11 and MX-13 Operatora s Manuals.

11033376

Date: 2026-05-20. Type: Service Bulletin/Repair Instructions. Systems: STEERING.

a Updated cross shaft and bearing installation steps have been added to the repair procedures.

11032284

Date: 2026-04-01. Type: Emissions. Systems: ELECTRICAL SYSTEM, ENGINE.

EPA17-24 MX Fuel Injector Connector - This bulletin has been revised to include all EPA17-24 and CARB24 PACCAR MX engines.

Notes on this record

  • Complaints from the API and bulk file are merged and deduplicated by ODI number; the API alone misses records.
  • System and subsystem counts are numbers of distinct complaints, recalls or communications that name them. One record can name several systems, so shares across systems can add to more than 100 percent; a single share never exceeds 100 percent.
  • Recalls are counted once per campaign, investigations once per action and manufacturer communications once per NHTSA id, even when NHTSA lists several model names for the same record.
  • A sales denominator is a calendar-year proxy, not the population of vehicles still in use. Rates are copied from verified pipeline output.
  • NHTSA's complaints API and bulk file list no complaint for this make, model and model year in this data build.

Other names NHTSA uses

None listed.

Matched NHTSA models

Matched labels and complaints
NHTSA model labelComplaints
L7700

Same model, other years

All model years | All Kenworth models

Other Kenworth models, 2026

Sources

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