Kenworth T660 problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
7 owner complaints analyzed
56 distinct recall campaigns
160,225 mi median reported failure mileage
Scope: 2004 to 2020 model years. Data snapshot: . 5 complaints include usable failure mileage.
This selection has limited data. It remains available for lookup but is excluded from search indexing.
Most common problems
Engine And Engine Cooling:Engine:Diesel is the most frequently named component, appearing in 2 of 7 complaints (28.6%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Braking behavior | 3 | 42.9% |
| Steering behavior | 2 | 28.6% |
| Electrical and battery issues | 1 | 14.3% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Engine And Engine Cooling:Engine:Diesel | 2 |
| Electrical System | 1 |
| Electronic Stability Control (Esc) | 1 |
| Engine | 1 |
| Service Brakes | 1 |
| Service Brakes, Air | 1 |
| Service Brakes, Hydraulic | 1 |
| Steering | 1 |
Engine And Engine Cooling:Engine:Diesel: 2; Electrical System: 1; Electronic Stability Control (Esc): 1; Engine: 1; Service Brakes: 1; Service Brakes, Air: 1; Service Brakes, Hydraulic: 1; Steering: 1
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 0 |
| 25,000 to 49,999 | 1 |
| 50,000 to 74,999 | 0 |
| 75,000 to 99,999 | 0 |
| 100,000 to 149,999 | 1 |
| 150,000 and above | 3 |
Under 25,000: 0; 25,000 to 49,999: 1; 50,000 to 74,999: 0; 75,000 to 99,999: 0; 100,000 to 149,999: 1; 150,000 and above: 3
150,000 and above miles has the most reports with usable mileage (3). 2 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 2010 | 1 |
| 2011 | 2 |
| 2012 | 1 |
| 2013 | 1 |
| 2014 | 1 |
| 2021 | 1 |
2010: 1; 2011: 2; 2012: 1; 2013: 1; 2014: 1; 2021: 1
Pattern summary
Engine And Engine Cooling:Engine:Diesel leads the component reports. Braking behavior appears in 3 complaint narratives. Steering behavior appears in 2 complaint narratives. Electrical and battery issues appears in 1 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 10399881 · 2011-05-10 (May 10, 2011)
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 POL…
Owner-reported narrative. 145,000 miles reported. Look up ODI 10399881 at NHTSA ↗
Owner report 10545083 · 2013-09-24 (September 24, 2013)
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)
Owner-reported narrative. 373,000 miles reported. Look up ODI 10545083 at NHTSA ↗
Owner report 10426705 · 2011-09-22 (September 22, 2011)
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
Owner-reported narrative. 160,225 miles reported. Look up ODI 10426705 at NHTSA ↗
Owner report 10317599 · 2010-03-05 (March 5, 2010)
CUMMINS ISX ENGINE SHUT DOWN TWELVE TIMES SINCE AUG (7 MONTH PERIOD) ON HWY OFTEN REQUIRING A TOW UPDATED 4/26/10 *CN IT WAS FINALLY DETERMINED THE WIRING HARNESS THAT SUPPLIED POWER TO THE ECM WAS NOT CONNECTED PROPERLY FROM THE FACTORY. OVER TIME, THE CONNECTION BECAME WORSE WHICH CAUSED THE ENGINE TO SHUT DOWN. UPDATED 06/04/10. *JB
Owner-reported narrative. Look up ODI 10317599 at NHTSA ↗
Recalls by model year
All campaigns in the snapshot affecting each model year, including recalls announced years later.
Recall campaigns
Shared campaigns appear once in each affected model year.
| Category | Count |
|---|---|
| 2004 | 2 |
| 2005 | 4 |
| 2006 | 4 |
| 2007 | 8 |
| 2008 | 14 |
| 2009 | 17 |
| 2010 | 10 |
| 2011 | 13 |
| 2012 | 9 |
| 2013 | 6 |
| 2014 | 11 |
| 2015 | 11 |
| 2016 | 10 |
| 2017 | 6 |
| 2018 | 6 |
| 2019 | 5 |
| 2020 | 1 |
2004: 2; 2005: 4; 2006: 4; 2007: 8; 2008: 14; 2009: 17; 2010: 10; 2011: 13; 2012: 9; 2013: 6; 2014: 11; 2015: 11; 2016: 10; 2017: 6; 2018: 6; 2019: 5; 2020: 1