What Kenworth T660 owners have reported to NHTSA, the service bulletins the manufacturer sent dealers, and any federal defect investigations, by model year. See Kenworth T660 safety recalls or check your VIN.
Complaints owners filed with NHTSA, by the model year of the vehicle. A high count can also mean a popular year, so compare it with how many were sold.
| Year | Complaints | Crashes | Fires | Injured | Deaths | TSBs |
|---|---|---|---|---|---|---|
| 2020 | 0 | 0 | 0 | 0 | 0 | 5 |
| 2019 | 0 | 0 | 0 | 0 | 0 | 19 |
| 2018 | 0 | 0 | 0 | 0 | 0 | 23 |
| 2017 | 0 | 0 | 0 | 0 | 0 | 24 |
| 2016 | 0 | 0 | 0 | 0 | 0 | 27 |
| 2015 | 0 | 0 | 0 | 0 | 0 | 22 |
| 2014 | 1 | 0 | 0 | 0 | 0 | 18 |
| 2013 | 0 | 0 | 0 | 0 | 0 | 16 |
| 2012 | 1 | 0 | 0 | 0 | 0 | 28 |
| 2011 | 1 | 0 | 0 | 0 | 0 | 46 |
| 2010 | 2 | 1 | 0 | 1 | 0 | 54 |
The vehicle systems named most often in Kenworth T660 complaints (one complaint can name several).
In the owners’ own words, as filed with NHTSA. Unverified reports; NHTSA removes personal details before publishing.
The contact owns a 2014 Kenworth T660. The contact received a recall notification for NHTSA Campaign Number: 20V199000 (Electronic Stability Control, Service Brakes, Air). The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was notified of the issue. The part was not available for repair. The contact had not experienced a failure. Parts distribution disconnect.
CUMMINS ENGINE HAS NOT COME FORWARD AND ANNOUNCE ON THEIR IS 15 LITERS THAT THERE ARE HAVING RINGS AND SLEEVES ISSUES. WHICH CAUSE THE ENGINE TO BURN OIL FAILING OUR DIESEL PARTICULAR FILTER WHICH COULD CAUSE A FIRE. THE EXIST DUE A DESIGNEE FAULT IN THE PISTONS OF THE ENGINES. RINGS ARE PACKING WITH SOOT AND PUSHING RINGS OPEN AND ALLOWING OIL TO BURN IN THE ENGINE . THE EXTRA THEN CAUSE DPF COG FAST MAKING MORE REGN. IF THE DPF CAN NOT CLEAR IT SELF IT IS A CONSTANT RENG. THIS COULD LEAVE TO A FIRE. *TR
DURING PRE-TRIP INSPECTION, SERVICE BRAKE CHECK FAILED, TOOK TO LONG TO BUILD UP AIR PRESSURE, ULTIMATELY, THE SYSTEM WOULD NOT REGISTER ANY AIR PRESSURE BY GAUGE OR PHYSICALLY.[XXXX], [XXXX] *JS INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
WHILE GOING DOWN LONG MOUNTAIN GRADES, IN HOT WEATHER, THE STEERING LOCKS UP. I WAS TOLD THAT IT NEEDED A OIL COOLER. I PAID $1280.00 FOR AN OIL COOLER. TRW DOES NOT THINK THEY HAVE ANY RESPONSIBILITY TO WARRANTY A ONE YEAR OLD STEERING GEAR. EVEN THOUGH THEY KNOW THAT IT IS A MALFUNCTIONING RELIEF VALVE. *TR
TL* THE CONTACT OWNS A 2010 KENWORTH T660 TRUCK. WHILE DRIVING APPROXIMATELY 10 MPH, THE CONTACT ATTEMPTED TO DEPRESS THE BRAKE PEDAL WHEN HE NOTICED THAT THE VEHICLE WAS HESITANT TO STOP. THE CONTACT WAS ABLE TO PULL THE EMERGENCY BRAKE IN ORDER TO SLOW THE VEHICLE SPEED BUT THE CONTACT CRASHED INTO THE VEHICLE POSITIONED IN FRONT OF HIM. THE CONTACT NOTICED THERE WAS A COVER OVER THE STEERING COLUMN WHICH INTERFERED WHEN HE ATTEMPTING TO BRAKE. THE CONTACT STATED THAT THE BRAKE PEDAL WAS EXTREMELY NARROW AND MADE IT DIFFICULT TO ENGAGE. A POLICE REPORT WAS FILED. THE CONTACT WAS NOT INJURED BUT THE DRIVER OF THE SECOND VEHICLE STATED SHE RECENTLY HAD SURGERY ON HER SHOULDER AND WAS WORRIED…
Repair instructions and other communications the manufacturer sent dealers about known issues. A TSB is not a recall, and the repair is usually free only while the car is under warranty; ask your dealer for the bulletin number.
"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."
CARB Chassis Update - Chassis list updated with 5 KW and 31 PB additional chassis.
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 all service brake chambers which fail to conform to Federal Motor Vehicle Safety Standard (FMVSS) No.121, Air Brake Systems.
Certain C500/T440/T470/T660/T680/T800/T880/W900 chassis may have air tank reservoirs that do not meet air volume requirements per FMVSS/CMVSS 121 âÃÂÃÂAir Brake SystemsâÃÂÃÂ. This bulletin will be updated when repair parts and procedures are available.
Safety Recall Repair parts and procedures are now available. On certain Kenworth model years 2018 through 2024 C500/T660/T800/W900 trucks with Sears Atlas 70 or 80 series seats, a spacer was installed on the seatbelt mounting assembly. In a severe collision, the ICP bar may fail, increasing the risk of injury.
Safety Recall Interim Notification On certain Kenworth model year 2018 through 2024 C500/T660/T800/W900 trucks with Sears Atlas 70 or 80 series seats, an additional spacer was installed on the seatbelt mounting assembly. In a severe collision, the ICP bar may fail allowing the seatbelt to slip, increasing the risk of injury. This bulletin will be updated when repair parts and procedures become available.
Certain chassis with Engine Model Year 2016-2021 PACCAR MX-11/MX-13, or EPA13 and EPA21 Cummins ISX12/ISX15/X15 engines that had a previously failed DEF sensor and with DEF sensor software disabled due to industry DEF sensor shortages will now be able to receive a replacement DEF sensor, DEF tank heater coolant control valve, and re-enabled DEF diagnostic software. Please note that chassis equipped with PACCAR PX engines will be eligible for this repair at a future date when software is available.
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 existing Remote Diagnostic cs hardware to deliver secure software updates remotely. This will reduce downtime and save on maintenance costs for eligible vehicles.
Kenworth is providing guidance for PACCAR MX Engine Composite Oil Pan leak troubleshooting to avoid over-repairs and to provide warrantable repair guidance. Oil leaks, if not repaired, can lead to severe engine damage.
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 update will allow a vehicle to continue operation with a failed DEF sensor by disabling the DEF sensor diagnostics.
Emissions Recall - PACCAR MX-13 Engine Model Year 2015B engines require a software update to ensure emissions compliance for On-Board Diagnostic (OBD).
Information Only â Windshield washer pumps have a high No Trouble Found rate. Washer pumps may fail to spray due to a clogged filter.
Source: NHTSA Office of Defects Investigation public data (complaints, manufacturer communications, investigations), model years 2010 and later. Had a safety problem? Report it to NHTSA.
In complaints filed with NHTSA for model years 2010–2020, owners most often name: electronic stability control (esc), engine, service brakes. 5 complaints are on record.
No. A complaint is an unverified report from an owner. A technical service bulletin (TSB) is the manufacturer telling dealers how to fix a known issue; it is not a safety recall and is usually covered only under warranty. A recall is a formal safety action, and its repair is free.
File a vehicle safety complaint at NHTSA.gov. NHTSA reads every report, and patterns of complaints are what open defect investigations and, eventually, recalls.