RoadVitals

2011 Kenworth T660

Recalls, owner-reported complaints, investigations and safety data

Data refreshed

Owner complaintsComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
1
Latest Sep 24, 2013
Safety recallsA safety recall is issued when a manufacturer or NHTSA determines that a vehicle has a safety-related defect or does not comply with a federal motor vehicle safety standard. Recall repairs are free. Whether a specific vehicle is covered depends on its VIN — a recall listed for a model year does not necessarily apply to every vehicle of that year.
13
Latest Feb 23, 2024
InvestigationsNHTSA opens an investigation to examine whether a safety defect may exist. An open investigation is not a determination that a defect exists, and many investigations close without a recall. Investigations can, however, lead to one.
0
Crash or fire reportedComplaints whose submitter recorded that a crash or a fire occurred. These are the reporter's own answers on the NHTSA form, not verified findings.
0

Overview

Our database contains 1 NHTSA owner-reported complaint for the 2011 Kenworth T660, most frequently naming the brakes category. 13 safety recalls have been issued covering this model year; and 45 manufacturer communications are on file.

Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.

What owners report

Complaints grouped by the component NHTSA recorded

  • Brakes1100.0%

Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.

Safety recalls

13 campaigns cover this model year

View all 13

Recalls apply to specific vehicles, not to every vehicle of a model year. Check your VIN with NHTSA or your manufacturer's dealer to confirm whether a recall affects your vehicle.

Check a VIN on NHTSA.gov
24V145000

SERVICE BRAKES, AIR:SUPPLY:RESERVOIR/TANK

Feb 23, 2024
936 units potentially affected
The defect: PACCAR Incorporated (PACCAR) is recalling certain 2009-2021 Kenworth C500, 2012-2021 Kenworth T440, 2009-2015 Kenworth T660, 2015-2024 Kenworth T680, 2009-2024 Kenworth T800, 2009-2020 Kenworth T370, 2014-2023 Kenworth T880, 2011-2016 Kenworth T470, 2023 Kenworth T480, and 2009-2019 Kenworth W900 vehicles. The air tanks have an insufficient volume of air for the brake system. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 121, "Air Brake Systems."
The risk: Insufficient air volume can reduce braking performance and increase the risk of a crash.
The remedy: Dealers will install the correct volume air tanks, free of charge. Owner notification letters were mailed August 12, 2024. Additional owner notification letters were mailed October 27, 2025. Owners may contact PACCAR customer service at 1-425-828-5888. PACCAR's number for this recall is 24KWD.
PACCAR IncorporatedManufacturer number 24KWDView on NHTSA.gov
20V199000

ELECTRONIC STABILITY CONTROL (ESC); SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT

Apr 6, 2020
460,515 units potentially affected
The defect: 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-lock Brake System (ABS) loses battery and/or ignition power to the controller, the dash warning light for the ABS may not illuminate to warn the driver of the loss of ABS. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 121, "Air Brake Systems," and 136, "Electronic Stability Control System on Heavy Vehicles."
The risk: If the driver unknowingly operates the vehicle without the ABS functioning, there would be an increased risk of a crash.
The remedy: PACCAR will notify owners, and dealers will update the NAMUX software within the cab control module, free of charge. PACCAR issued owners an interim notification on June 4, 2020. The recall began May 26, 2020. Owners may contact Kenworth customer service at 1-425-828-5888 or Peterbilt customer service at 1-940-591-4220. PACCAR's number for this recall is 20pbc AND 20KWB.
PACCAR IncorporatedManufacturer number 20pbc AND 20KWBView on NHTSA.gov
15V458000

EXTERIOR LIGHTING:HAZARD FLASHING WARNING LIGHTS; EXTERIOR LIGHTING:HEADLIGHTS

Jul 22, 2015
12,551 units potentially affected
The defect: PACCAR Incorporated (PACCAR) is recalling certain model year 2011-2016 Kenworth T440, T470, T660, T680, and T880 trucks manufactured January 14, 2010, to May 22, 2015, and equipped with HID Headlamps and the option for Daytime Running Lamps (DRL). The DRLs are required to deactivate when the hazard warning lights are activated, however, the DRLs on these vehicles override the hazard flashing functionality after the brake pedal is pushed for more than two seconds. Normal hazard flashing functionality returns once the service brake is released. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 108, "Lamps, Reflective Devices, and Associated Equipment."
The risk: If the hazard warning lamps are overridden by the DRL, oncoming vehicles may fail to be warned, increasing the risk of a crash.
The remedy: Kenworth will notify owners, and dealers will update the cab controller software, free of charge. The recall began on September 167, 2015. Owners may contact Kenworth customer service at 1-425-828-5000. Kenworth's number for this recall is 15KWL.
PACCAR IncorporatedManufacturer number 15KWLView on NHTSA.gov

Recent owner complaints

Reports submitted to NHTSA, shown in the owner's own words

Brakes
Filed Sep 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)

NHTSA ID
10545083
Incident
Sep 17, 2013
Mileage
373,000 mi

Manufacturer communications

A bulletin sent by a manufacturer to its dealers. Not a recall, and repairs are not necessarily free.

24KWD

SERVICE BRAKES, AIR

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 “Air Brake Systems”. This bulletin will be updated when repair parts and procedures are available.

02-160

EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; VISIBILITY; VISIBILITY:WINDSHIELD WIPER/WASHER

Information Only – Windshield washer pumps have a high No Trouble Found rate. Washer pumps may fail to spray due to a clogged filter.

32-015

ELECTRICAL SYSTEM

Information Only: This bulletin provides dealers with a battery warranty quick reference guide to ensure the appropriate tests for battery warranty are performed in order to prevent battery warranty claims filed with incorrect or incomplete information.

32-016

EQUIPMENT

Information Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment damage.

34-085

ELECTRICAL SYSTEM; VEHICLE SPEED CONTROL

Information Only – Vehicles may have the connector seals on the wheel speed sensor incorrectly installed, which may lead to water intrusion and corrosion in some vehicles.

03-071

ELECTRICAL SYSTEM:SOFTWARE

Information Only - Vehicles built with NAMUX software from 2013 to present may experience accuracy issues with the tachometer. The issue can be temporarily resolved using any one of the included procedures.

Manufacturers file copies of the bulletins they send to dealers with NHTSA. These often describe diagnostic or repair procedures for a known condition. They are not recalls: repairs described in a bulletin are usually only free if the vehicle is still under warranty or the manufacturer has extended coverage.

Compare model years

Complaint and recall counts across every year of this model

Kenworth T660 by model year
YearComplaintsRecallsInvestigationsIssue Index
2020010—
2019050—
2018060—
2017060—
20160100—
20150110—
20141110—
2013060—
2012190—
2011Viewing1130—
20102100—
20090171—
20082142—
2007082—
2006040—
2005040—
2004020—
2003000—
2002000—

Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers. Older model years have had longer for reports to accumulate.