AI Damage2021 Kenworth T370: common problems
The maker issued 15 service bulletins for this year. Details by component below, with sources.
Key figures
- Technical service bulletins (TSB)
- 15
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Equipment | 0 | 0 | 3 |
| Fuel system | 0 | 0 | 3 |
| Electrical system | 0 | 0 | 2 |
| Engine and cooling | 0 | 0 | 2 |
| Powertrain | 0 | 0 | 2 |
| Engine | 0 | 0 | 1 |
| Forward collision avoidance | 0 | 0 | 1 |
| Fuel/propulsion system | 0 | 0 | 1 |
| Service brakes | 0 | 0 | 1 |
| Steering | 0 | 0 | 1 |
| Visibility | 0 | 0 | 1 |
| Other | 0 | 0 | 1 |
Comparison
What to check before buying
- Fuel system. Fuel smell, leaks, rough running, fuel-system codes.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- "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…
- The verbiage in the Introduction section has been updated
- Bogie Crossmember Torque Value Update - Procedure has been updated to correct torque values
- Certain vehicle model years 2020-2025 K270, K370, T270, T280, T370, T380, T480, T680, T880, W900 chassis…
Certain vehicle model years 2020-2025 K270, K370, T270, T280, T370, T380, T480, T680, T880, W900 chassis have updated Greenhouse Gas (GHG) labels available for installation.
- SAFETY RECALL Additional chassis have been included
The chassis list has been updated. Certain T370 / T440 / T470 / T480 / T660 / T680 / T800 / T880 / W900 / C500 chassis may be equipped with air tank reservoirs that have less than twelve times the combined volume of…
- Info Only - PACCAR is introducing Over-the-Air (OTA) software updates for engine MY17 and newer chassis…
Info Only - PACCAR is introducing Over-the-Air (OTA) software updates for engine MY17 and newer chassis equipped with Cummins X15, X12, ISX12, ISX12N, L9N, PX-7, and PX-9 engines The technology will leverage the…
- Safety Recall â Interim Notification - The Dana D-Series front axle steer arm fasteners that attach…
Safety Recall â Interim Notification - The Dana D-Series front axle steer arm fasteners that attach the steer arm to the steering knuckle may fail, increasing the risk of a crash or injury. Repair information will…
- Information Only
Due to differences between the PACCAR MX-11 or MX-13 2021A and 2021B engines, technicians must be able to identify which of these engines are in a chassis.
- Fix-As-Fail â Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are…
Fix-As-Fail â Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are available. As a temporary solution, after PACCAR confirms a DEF sensor is not available, a temporary software…
- âSafety Recall - Model year 2021 Cummins PX9 fuel hose assemblies may leak from the hoses between the…
âSafety Recall - Model year 2021 Cummins PX9 fuel hose assemblies may leak from the hoses between the fuel pump and the remote filter head. A fuel leak in the presence of an ignition source may increase the risk of a…
- Safety Recall â Cummins Fuel Rail Leak â NHTSA ID
21V391 / TC: 2021-323, Cummins Recall: C2423. Cummins PX9 and ISX12 fuel rails may leak around a sealing washer, potentially resulting in fuel leaks. Undetected prolonged diesel fuel spray in the presence of an…
- Information Only â Windshield washer pumps have a high No Trouble Found rate
Washer pumps may fail to spray due to a clogged filter.
NHTSA lists 15 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2021 Kenworth T370?
There are no owner complaints in the NHTSA data for this year; the data comes from 15 manufacturer service bulletins.
How many service bulletins (TSB) were issued for the 2021 Kenworth T370?
NHTSA lists 15 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2021 Kenworth T370 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2021 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.