KENWORTH T660 · model year

2008 KENWORTH T660

3 NHTSA complaints, 1 crash report, and 14 active recalls for this specific cohort.

NHTSA overall rating

Not crash-tested

New Car Assessment Program

The 2008KENWORTHT660 carries 3 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 1 crash, 1 fire, 0 injuries, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.

Component-level analysis is where model-year complaints become actionable: the top complaint category for the 2008 T660 is engine and engine cooling:engine:diesel with 2 filings, followed by electrical system (1). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability. This model year has 14 active recall campaigns, which means the manufacturer is obligated to remedy the covered defect at no charge for the life of the vehicle — the full NHTSA campaign numbers are listed below.

NHTSA currently has 3 investigation files overlapping the 2008 T660. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.

3
Complaints
1
Crashes
1
Fires
0
Injuries
0
Deaths

Total Complaints

3 filings

Crashes Reported

1 reports

Source

NHTSA ODI

Federal complaints database

Complaints vs. fleet median (215)

At or below the fleet median complaint volume.

Complaints by Component

ComponentCount
ENGINE AND ENGINE COOLING:ENGINE:DIESEL2
ELECTRICAL SYSTEM1

Recalls (14)

09V23900030/06/2009

SERVICE BRAKES, AIR

KENWORTH IS RECALLING 3,423 MY 2004-2009 T2000, T800,T600, W900 AND T660 VEHICLES. INCREASED BRAKE EXCITATION IN A CERTAIN VEHICLE CONFIGURATION WHICH INCLUDES BENDIX DRUM BRAKES, WIDE BASE LOW PROFILE SINGLE TIRES, AND AN AG400 OR AG460 REAR SUSPENSION, DUE TO ITS UNIQUE BRAKE CLOCKING AND CAM TUB

07V26900026/06/2007

TRAILER HITCHES

ON CERTAIN TRUCKS, THE REMOVABLE TOW HITCH ,WHEN USED TO TOW OR LIFT A VEHICLE, CAN FAIL DUE TO DEFECTIVE MATERIAL IN THE TOW HITCH.

08V48500024/09/2008

SUSPENSION

PACCAR IS RECALLING 130 MY 2004-2009 T2000, T800, T600, W900 AND T660 KENWORTH TRUCKS BUILT WITH AN AG400 REAR SUSPENSION, LONG STROKE BRAKE CHAMBERS, AND WIDE BASE TIRES (SUPER SINGLES). THESE VEHICLES MAY DEVELOP AN INCREASE IN LATERAL AND VERTICAL AXLE MOVEMENT. THIS MOVEMENT MAY CAUSE PART OR

11V20300024/03/2011

ENGINE AND ENGINE COOLING

PACCAR IS RECALLING CERTAIN MODEL YEAR 2007-2011 KENWORTH C500, T2000, T600, AND T660, AS WELL AS MODEL YEAR 2009-2011 PETERBILT 387 AND 388 TRUCKS EQUIPPED WITH CATERPILLAR C15 ENGINE AND MANUFACTURED FROM MAY 11, 2006, THROUGH SEPTEMBER 17, 2010. DEGRADATION OF A COMBUSTION TUBE WELD CAN CAUSE

08V48700023/09/2008

ENGINE AND ENGINE COOLING:ENGINE:DIESEL

PACCAR IS RECALLING 4,883 MY 2006-2009 KENWORTH T600, T660, T800, W900, T2000 AND MY 2008-2009 PETERBILT 365, 367, 379, 384, 386, 387, 388 AND 389 TRUCKS. INADEQUATE STIFFNESS OF THE DIESEL PARTICULATE FILTER (DPF) BRACKET COULD RESULT IN SEPARATION OF THE DPF FROM THE CHASSIS.

11V12700023/02/2011

FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY

PACCAR IS RECALLING CERTAIN MODEL YEAR 2008-2012 KENWORTH T2000, T660, T700, T800, AND W900, AS WELL AS MODEL YEAR 2009-2012 PETERBILT 365, 367, 384, 386, 387, 388, 389, AND 587 TRUCKS EQUIPPED WITH PACCAR MX ENGINES. THE OIL MODULE CENTRIFUGAL SPINNER FILTER CAP IN THE PACCAR MX ENGINE MAY BECOME

08V12800021/03/2008

PARKING BRAKE:CONVENTIONAL:AIR

PACCAR IS RECALLING 1,043 MY 2008-2009 KENWORTH C500, T2000,T660, T800 AND W900 TRUCKS EQUIPPED WITH BENDIX MV-3 DASH CONTROL VALVES. THE MOLDED VALVE BODY HAS AN INCORRECT CORE PIN IN THE INJECTION MOLD CAUSING THE VALVE BODY TO BE OVERSIZED IN THE DOUBLE CHECK VALVE AREA. THIS CONDITION CAN ALLO

07V59100020/12/2007

STEERING:GEAR BOX:SHAFT SECTOR

ON CERTAIN KENWORTH AND PETERBILT HEAVY DUTY TRUCKS EQUIPPED WITH TAS-85 TRW STEERING GEARS, THE INNER SURFACE OF THE OUTER SECTOR SHAFT TEETH OF THE STEERING GEARS MAY HAVE AN INCORRECT INVOLUTE PROFILE, WHICH MAY LEAD TO CHIPPING AND DAMAGE OF THE GEARING SYSTEM.

09V16600019/05/2009

SERVICE BRAKES, AIR:DISC

PACCAR IS RECALLING 140 MY 2005, 2007-2009 T800, W900, AND T660 TRUCKS. THE CALIPER MOUNTING FASTENERS ATTACHING THE AIR DISC BRAKE CALIPER ASSEMBLY TO THE TORQUE PLATE MAY HAVE RECEIVED INSUFFICIENT TORQUE DURING THE INSTALLATION PROCESS. THE INSUFFICIENT TORQUE MAY ALLOW THE AIR DISC BRAKE CALIP

10V63400013/12/2010

POWER TRAIN:AXLE ASSEMBLY

PACCAR IS RECALLING CERTAIN MODEL YEAR 2007-2008 KENWORTH AND PETERBILT VEHICLES MANUFACTURED FROM FEBRUARY 2, 2006 THROUGH APRIL 30, 2007. THE BEARING SURFACES OF THE EXTENDED LUBE UNIVERSAL JOINT THAT ATTACHES THE INTER-AXLE DRIVELINE TO THE DRIVE AXLE MAY BECOME PREMATURELY WORN DUE TO BREAKDOWN

07V19500007/05/2007

ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN

ON CERTAIN TRUCKS BUILT WITH CUMMINS C15 OR ISX ENGINES AND EQUIPPED WITH HORTON ENGINE FANS, DURABILITY TESTING REVEALED MICRO CRACKS IN THE FAN BLADES.

08V06500007/02/2008

LATCHES/LOCKS/LINKAGES:DOORS:LATCH

PACCAR IS RECALLING 6,169 MY 2008 KENWORTH T300, T660, T800, T2000, W900 AND C500 VEHICLES AND MY 2008-2009 PETERBILT MODELS 365, 367, 384, 387, 388, 389 AND 389 KITS. CERTAIN DOOR LATCH ASSEMBLIES ON THESE VEHICLES FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 20

20V19900006/04/2020

ELECTRONIC STABILITY CONTROL (ESC)

PACCAR Incorporated (PACCAR) is recalling certain 2008-2019 Peterbilt 330, 335, 337, 340, 348, 365, 367, 384, 386, 387, 388, 389, 567, 579 and 587 vehicles and 2008-2020 Kenworth T170, T270, T370, T660, T680, T800, T880, and W900 vehicles equipped with NAMUX Software. In the event that the Anti-lo

10V30800002/07/2010

STEERING:COLUMN

PACCAR IS RECALLING CERTAIN MODEL YEAR 2008-2010 TRUCKS EQUIPPED WITH TRW STEERING SHAFTS. THE CIRCUMFERENTIAL WELD AROUND THE STEERING SHAFT TUBE THAT WELDS THE SPLINED TUBE TO THE NON-SPLINED TUBE MAY BE MISLOCATED. MISLOCATION OF THE CIRCUMFERENTIAL WELD MAY ALLOW THE SPLINED TUBE AND NON-SPLIN

Recent Complaints

20120202CrashFireENGINE AND ENGINE COOLING:ENGINE:DIESEL

2008 KENWORTH T660 WITH A CATERPILLAR C-15 ENGINE. CONSUMER STATES TRUCK CAUGHT FIRE AFTER ACCIDENT *TGW THE CONSUMER STATED A TANKER TRUCK SUDDENLY STOPPED UNEXPECTEDLY AND THE CONSUMERS HUSBAND HIT THE TANKERS BUMPER. SMOKE AND FLAMES STARTED POURING OUT FROM UNDER THE GOOD OF THE TRACTOR. THE CONSUMERS HUSBAND GRABBED THE EXTINGUISHER, RAN TO THE FRONT OF THE TRUNK, BUT BECAUSE OF THE SMOKE AND FLAMES, HE WAS UNABLE TO OPEN THE HOOD. HE DISCHARGED THE FIRE EXTINGUISHER UNDER THE DRIVER'S SIDE WHEEL WELL, BUT THE ENTIRE TRACTOR WAS SOON ENGULFED IN FLAMES. THE FIRE DEPARTMENT EXTINGUISHED THE FLAMES AND THE TRACTOR WAS TOWED TO AN IMPOUND YARD. THE INSURANCE INVESTIGATORS COULD NOT DETERMINE THE CAUSE OF THE FIRE, DUE TO THE AMOUNT OF FIRE DAMAGE TO THE ENGINE. *JB

Mileage: 32,000

20100305ELECTRICAL SYSTEM

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

20100305ENGINE AND ENGINE COOLING:ENGINE:DIESEL

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

Compare 2008KENWORTHT660 to Similar Vehicles

NHTSA Investigations

Frequently Asked Questions

How many complaints does the 2008 KENWORTH T660 have?
The 2008 KENWORTH T660 has 3 NHTSA complaints, 1 crashes, 1 fires, 0 injuries, and 0 deaths reported.
Are there any recalls for the 2008 KENWORTH T660?
Yes, the 2008 KENWORTH T660 has 14 recall(s). The most common affected component is SERVICE BRAKES, AIR. Recalls are issued by NHTSA and manufacturers must provide a free remedy.
What are the most common problems with the 2008 KENWORTH T660?
The most-complained component for the 2008 KENWORTH T660 is ENGINE AND ENGINE COOLING:ENGINE:DIESEL with 2 complaints. Other frequently reported areas include ELECTRICAL SYSTEM.
Is the 2008 KENWORTH T660 safe to buy?
Review the complaint history, crash and fire reports, safety ratings, and recall status on this page to make an informed decision. No NHTSA crash test rating is available for this model year. Compare with other model years using the links above.
Where does this data come from?
All complaint, recall, and safety rating data is sourced from the National Highway Traffic Safety Administration (NHTSA). Complaints are filed by vehicle owners through NHTSA's Office of Defects Investigation.

Vehicle Safety Guides

Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.