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Kenworth T660

Model years 2002–2020 in the US safety record. No model year stands out in owner complaints. Fewest complaints: 2011, 2012, 2014.

7owner complaints
56recall campaigns
411service bulletins
19model years on record

Complaints by model year

Each bar is one model year. The most recent years are still collecting complaints.

’02’05’08’11’14’17’20’02’05’08’11’14’17’20

NHTSA ODI complaints (public domain) · updated 23 Oct 2026

Year by year

Model yearComplaintsRecallsBulletinsCrashes · fires
20200130 · 0
201905170 · 0
201806200 · 0
201706210 · 0
2016010250 · 0
2015011210 · 0
2014111170 · 0
201306150 · 0
201219270 · 0
2011113450 · 0
2010210531 · 0
2009 T660017350 · 0
2008 T660214331 · 1
2007 T66008260 · 0
200604170 · 0
200504130 · 0
20040290 · 0
20030070 · 0
20020070 · 0

A model year gets its own page when it has enough data for at least three sections

Most common problems

  • Engine and engine cooling2
  • Unknown or other1
  • Steering1
  • Service brakes, hydraulic1
  • Service brakes, air1
  • Service brakes1
  • Engine1
  • Electronic stability control (esc)1

NHTSA ODI complaints, all model years

Recalls

56 campaigns cover the T660; the latest 12 are below.

24V145000 · Service brakes, air23 Feb 2024 · 2009, 2010, 2011, 2012, 2013, 2014, 2015

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."

23V717000 · Seat belts26 Oct 2023 · 2020

PACCAR Incorporated (PACCAR) is recalling certain 2020 Kenworth T660, 2018-2024 Kenworth T800 and W900 vehicles. An additional spacer may have been added to the joint that connects the seat to the seat belt tether and buckle, causing an unsecured connection.

22V277000 · Steering25 Apr 2022 · 2018, 2019

PACCAR Incorporated (PACCAR) is recalling certain 2018-2020 Kenworth T270, T370, T440, T470, T660, T680, T880, T800, W900, W990; and 2018-2020 Peterbilt 330, 337, 348, 365, 367, 389, 520, 567, and 579 vehicles. The Dana D-Series axle steer arm fasteners that attach the steering arm to the steering knuckle may fail.

20V199000 · Electronic stability control (esc)6 Apr 2020 · 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019

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."

18V931000 · Power train21 Dec 2018 · 2018, 2019

PACCAR Incorporated (PACCAR) is recalling certain 2018-2019 Peterbilt 337, 348, 365, 367, 389, 567, 579 and 587 trucks and 2018-2019 Kenworth C500, T270, T370, T440, T660, T680, T800, T880 and W900 trucks equipped with automated manual transmissions. An internal component in the clutch assembly may fail, possibly resulting in unintended vehicle movement.

18V657000 · Engine and engine cooling21 Sept 2018 · 2017, 2018, 2019

PACCAR Incorporated (PACCAR) is recalling certain 2017-2019 Kenworth C500, T600, T660, T680, T800, T880 and W900 trucks, as well as Peterbilt 367, 386, 389, 567, 579 and 587 trucks, equipped with Cummins ISX15 or X15 diesel engines. In certain driving conditions, such as on a long down-hill grade, the fuel line may burst if the fuel pump cooling circuit screen becomes restricted.

18V555000 · Electrical system22 Aug 2018 · 2016, 2017, 2018, 2019

PACCAR Incorporated (PACCAR) is recalling certain 2016-2019 Kenworth C500, T660, T800, and W900 vehicles, equipped with 1.9M ISX15 engines. The engine harnesses may have been manufactured without check engine light (CEL) and stop engine light (SEL) circuits, preventing the driver from being warned of a serious engine problem.

18V368000 · Service brakes, air1 Jun 2018 · 2015, 2016, 2017, 2018

PACCAR Incorporated (PACCAR) is recalling certain 2017-2018 Peterbilt 567 and 579 trucks and 2015-2018 Kenworth T660, T680, T800, T880 and W900 trucks. 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."

17V593000 · Steering22 Sept 2017 · 2016

PACCAR Incorporated (PACCAR) is recalling certain 2016 Peterbilt 220, 320, 325, 330, 337, 348, 365, 367, 382, 384, 386, 389, 389G, 567, 579 and 587 trucks and Kenworth K170, T170, T270, T370, T440, T470,T660, T680, T800, T880, and W900 trucks equipped with certain Spicer D or E series steer axles. The castellated nut on the steer axles may not be properly torqued, allowing the tie rod to loosen.

16V803000 · Tires4 Nov 2016 · 2017

PACCAR Incorporated (PACCAR) is recalling certain model year 2017 Kenworth K370, T270, T370, T440, T660, T800 trucks manufactured February 2, 2016, to October 13, 2016, and Peterbilt 330, 337, 348, 367, 389, 567, and 579 trucks manufactured March 7, 2016, to October 5, 2016. The affected vehicles are equipped with certain Goodyear LHS Load Range G tires, size 295/75R22.5 G399A, that due to incomplete adhesion, have a tire tread that may partially separate.

16V426000 · Electrical system10 Jun 2016 · 2017

PACCAR Incorporated (PACCAR) is recalling certain model year 2017 Kenworth C500, T660, T680, T800, T880, and W900 vehicles manufactured March 9, 2016, to April 26, 2016 and 2017 Peterbilt 320, 365, 367, 389, 567, 579, and 587 vehicles manufactured March 10, 2016, to May 6, 2016. The affected vehicles are equipped with Cummins ISX12 or ISX15 engines and have an engine control module (ECM) that may short circuit, causing the engine to stall without warning without the ability to restart it.

15V597000 · Electrical system24 Sept 2015 · 2016

Paccar Incorporated (Paccar) is recalling certain model year 2016 Kenworth T370, T660, T680, T800, T880, and W900 vehicles manufactured July 31, 2015, to August 12, 2015, and 2016 Peterbilt 337, 348, 365, 367, 382, 386, 389, 567, 579, and 587 vehicles manufactured August 4, 2015, to August 12, 2015. In the affected vehicles, the Engine Control Module (ECM) may short circuit, causing the engine to stall without warning.

NHTSA recalls