When I was driving on the highway the transmission fault error came on and my truck came to a stop on on the highway. It changed gears weirdly and kept the rpm’s high. Once it came to a stop I turned the truck off and on and it work fine. This has happened multiple times and a nationwide failure of the MTM and transmission is the cause of this. Many of my fellow drivers are having this same issues and are having to replace the whole transmission due to the MTM failing and destroying the transmission.
The worst 2019 Kenworth T680 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Brakes3
- Body2
- Fuel system2
- Transmission2
- Electrical1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Brakes3
- Body2
- Fuel system2
- Transmission2
- Electrical1
- Engine1
Recalls 9
Service brakes, air: supply: reservoir/tank
- What is wrong
- 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."
- Risk
- Insufficient air volume can reduce braking performance and increase the risk of a crash.
- 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.
Recall number 24V145000 · Recall details
Steering: critical fasteners
- What is wrong
- 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.
- Risk
- Fastener failure can result in a loss of steering control, increasing the risk of a crash or injury.
- Remedy
- Dealers will replace and torque the steer arm fasteners, at no charge. Owner notification letters were mailed November 8, 2022. Owners may contact Kenworth customer service at 1‑425‑828‑5888 and Peterbilt customer service at 1‑940‑591‑4220. PACCAR's numbers for this recall are 22 PBB and 22 KWB.
Recall number 22V277000 · Recall details
Electrical system: wiring
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2016-2022 Peterbilt 567, 579, 2021-2022 Peterbilt 536, 2017-2021 Kenworth T880, 2016-2022 Kenworth T680, 2018-2020 Kenworth T440, 2020 Kenworth T270, and 2021 Kenworth T280 vehicles. The methane detection system will not function if the system loses power.
- Risk
- The operator may be unaware of a system malfunction or the presence of excessive methane levels, increasing the risk of injury or fire.
- Remedy
- Dealers will re-wire the warning alarm, free of charge. Owner notification letters were mailed December 1, 2022. Owners may contact Peterbilt customer service at 1‑940‑591‑4220, and Kenworth customer service at 1‑425‑828‑5888. PACCAR's numbers for this recall are 21KWH and 21PBN.
Recall number 21V00N000 · Recall details
Service brakes, air: antilock
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2016-2021 Kenworth T680 trucks equipped with a 2.1m Cab and WABCO 6S/6M ABS brake system with drum brakes. The brake systems were manufactured with a standard rear-brake ABS modulator valve instead of a quick release valve, which may exceed the intended service-brake release timing. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 121, "Air Brake Systems."
- Risk
- Longer than expected service-brake release timing may lengthen vehicle stopping distance, increasing the risk of a crash.
- Remedy
- PACCAR will notify owners, and dealers will replace the standard rear-brake, ABS modulator valve with a quick release valve, free of charge. The recall began November 30, 2020. Owners may contact PACCAR customer service at 1‑425‑828‑5888. PACCAR's number for this recall is 20KWD.
Recall number 20V593000 · Recall details
Service brakes, air: antilock: ABS warning light
- What is wrong
- 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."
- Risk
- If the driver unknowingly operates the vehicle without the ABS functioning, there would be an increased risk of a crash.
- 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.
Recall number 20V199000 · Recall details
Parking brake
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2018-2020 T680 and T880 tandem axle vehicles equipped with a parking brake on a single axle and certain models of automated manual transmissions. During cold temperatures, the signal from the park brake pressure switch to the transmission controller may be delayed possibly resulting in the vehicle moving unexpectedly.
- Risk
- Unexpected vehicle movement may increase the risk of a crash or injury.
- Remedy
- PACCAR will notify owners and dealers will replace the park brake pressure switch, free of charge. PACCAR issued owners and interim notification on June 3, 2019. The recall began August 6, 2019. Owners may contact PACCAR customer service at 1‑918‑259‑3258. PACCAR's number for this recall is 19KWB.
Recall number 19V275000 · Recall details
Power train: clutch assembly
- What is wrong
- 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.
- Risk
- Unintended movement of a vehicle can increase the risk of a crash.
- Remedy
- PACCAR will notify owners, and dealers will update the transmission control module, free of charge. The recall began February 23, 2019. Owners may contact PACCAR customer service at 1‑940‑591‑4220. PACCAR's numbers for this recall are 18PBE and 18KWH.
Recall number 18V931000 · Recall details
Exterior lighting
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2013-2019 Kenworth T680 and T880 and Peterbilt 579 trucks, greater than 30 feet long and equipped with side extender mounted intermediate marker lamp/turn signals that do not include a reflex reflector. Since both intermediate side marker lamps and reflex reflectors are required, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 108, "Lamps, Reflective Devices, and Associated Equipment."
- Risk
- Missing reflex reflectors can reduce the vehicle's visibility to other drivers, increasing the risk of a crash.
- Remedy
- PACCAR will notify owners and dealers will install reflex reflective tape, free of charge. The recall began January 15, 2019. Owners may contact PACCAR customer service at 1‑918‑259‑3258. PACCAR's number for this recall is 18KWF, and 18PBC.
Recall number 18V816000 · Recall details
Engine and engine cooling: engine: diesel
- What is wrong
- 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.
- Risk
- If the fuel line bursts, fuel may leak onto the road resulting in a roadway hazard for other motorists. The engine may also stall without warning, resulting in the vehicle's inability to restart, increasing the risk of a crash.
- Remedy
- Cummins will notify owners, and dealers will replace the suspect fuel pump cooling circuit screen, free of charge. The recall began November 21, 2018. Owners may contact PACCAR customer service at 1‑940‑591‑4220. PACCAR's number for this recall is 18E081.
Recall number 18V657000 · Recall details
See all 9 recalls for the 2019 Kenworth T680
Defect investigations
Haldex Brake Chamber Failures
The Office of Defects Investigation (ODI) opened this Preliminary Evaluation (PE21018) based on eleven Vehicle Owner Questionnaires (VOQ). These VOQs included seven wheel-end fires on various Kenworth and Peterbilt trucks.Several of the VOQs were submitted by a maintenance facility stating that the fires were due to power spring fractures within brake chambers manufactured by Haldex Commercial Vehicle Systems (Haldex). According to the reports, the fractured spring punctured the brake chamber diaphragm, resulting in a partial loss of compressed air to the park brakes, causing the brakes to drag and overheat. ODI sent an information request letter to Haldex on August 3, 2021. On October 17, 2021, Haldex submitted a complete response. In this investigation, ODI analyzed thousands of warranty claims as well as fleet reports of brake chamber replacements. ODI gathered information from multiple vehicle manufacturers and reviewed legal testimony alleging defects and laboratory reports that raised concerns about spring failures initiated by corrosion. ODI found that spring failures were often detectable as soon as they occurred. In the subject incidents, after detecting the failures, some operators continued driving to a maintenance facility rather than stopping and waiting for a mobile technician to address the issue, increasing the risk of fire. While over twenty entities purchased the subject component from Haldex, the VOQs that ODI received involved only PACCAR vehicles. Haldex completed replacement campaigns for several fleets operating PACCAR vehicles, reducing the risk of further failures. Brake chambers have a limited service life. Industry guidance generally recommends replacement every two to four years depending on operating conditions, with some manufacturers and fleets recommending even shorter intervals. Vehicles operating in salt-belt states—where the majority of VOQs originated—require more frequent replacement than vehicles in less corrosive environments. Haldex’s standard warranty is four years and unlimited mileage. ODI determined that the average time in service for warranty claims was 4.9 years and 260,000 miles. Currently, all of the chambers subject to this investigation are between five and ten years old. Given the absence of recent failures and because the subject components are now older than their expected service life, ODI is closing this investigation. The closing of this investigation does not constitute a finding by the federal safety agency that a safety-related defect does not exist. The Agency reserves the right to take additional action if warranted by future circumstances. To review the ODI reports cited in the Closing Resume ODI Report Identification Number document, go to
PE21018
Technical service bulletins for the 2019 Kenworth T680 65
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Kw & pb DEF
- The new 2.1m day cab lift tools, a Level 3 mandatory tool, are now available to order.
- Certain chassis equipped with an engine model year 2019
- This optional software update is expected to be available after 10/30/2026 for chassis equipped with EMY...
- Replaced obsolete SRT codes with updated SRT codes.
- Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes
- An exhaust manifold slip joint seal kit is now available for EPA 2017-2024 PACCAR MX-13 engines.
- The Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to...
- Updated Eaton's TAIB0885EN Bulletin link.
- The PACCAR Powertrain Prognostics Webcast video link has been removed
What 2019 Kenworth T680 owners say
Most recent owner complaints, unedited.
The Eaton 12 speeds that these trucks come equipped with are failing just after the warranty expires. Lots of drivers with the same problem.
We have under hood fire during operating the truck. The driver was driving in TX. The police and fire department need to be involved to extinguish the fire. The truck need to be towed to terminal. The two dealers were doing estimate and the try to look up the causes of the fire, but is seems they not able to find it. We asked some privet mechanics and they think that fire could start from starter. The truck is 2019 T680 455,972 miles with engine Paccar MX-13. The truck is available fot inspection.
The contact owns a 2019 Kenworth T680. The contact stated while driving 75 MPH, there was an abnormal popping noise detected and the vehicle decelerated and the fuel system detached from the vehicle. The vehicle was towed to an independent mechanic and the contact was informed that the pump bolt had fractured. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not notified. The approximate failure mileage was 432,549.
Unit driving down road and brake chamber failed causing brakes to slowly apply without operator being aware until seen smoke coming from drive axle brakes. The low air pressure light did not illuminate, stayed high enough not to illuminate a low air warning. 2 independent fire inspections proved this was a haldex brake chamber failure. The chamber was inspected and found it is in the range where haldex had manufacturing defects of the power coil in the parking chamber, haldex confirmed they have an issue with the 3030 chamber, and not issuing a recall even though public safety as risk. Spring brake broke and punctured the rubber diaphragm causing the driver to loose control of the braking system and causing another total loss of truck and trailer. Entire interstate had to be shutdown for a long period of time. Causing more risk to public safety the haldex chamber has a fatal design flaw that haldex has admitted to and can lead to loss of braking and brake fires, causing tire explosions and cargo explosions, when the spring compresses the power coat protective coating is damaged and causes the power spring to rust this rust then causes the spring to brake and puncture the internal diaphram of the chamber. Haldex is also aware that the metal used in making the spring cannot handle the pressure forced upon it without breaking either by tooling causing marks and fatigue in the metal itself. The federal safety agency has also done its testing and confirmed all of these finding as well.
At highway speeds the collision mitigation system will go off for no reason causing a sudden hard braking. This seems to be extremely dangerous if vehicle is traveling on wet or icy roads, in close quarter construction zones or if vehicle happens to be in a turn. Unfortunately if another vehicle was following too close would be an accident, which I have heard has happened. I have taken truck to kenworth service twice and they said there is nothing they can do. It is a required system and are just very sensitive. I see nothing good about this system. When I come upon an actual hazard it doesn't go off. It is stressful to drive and wonder at any given time if the hard break and lights are going to go off and hope you are not around other vehicles that would also be affected by this unexpected stopping of a 80000 pound vehicle. Hopefully drivers will not find out what would happen of this occurred on wet or iced roads.
The tractor comes with no emergency trailer brakes handle in the cab like the rest of trucks it make it very dangerous while hauling 80,000 pounds and the service brakes takes forever to stop the truck also the top of the cab at the joints is leaking water not the first to complain bout this problem with the 2019 kw they say that's how they make trucks now without the trailer brakes handle I just have to use the service brakes
My father was fueling this brand new truck with cng (compressed natural gas) when one of the tanks exploded. The truck was stationary at the ang (american natural gas) station in buttonwillow california at the intersection of interstate 5 and hwy 58. My father is in critical condition at the icu in ucla with multiple broke bones as well as bleeding and swelling on his brain. I have attached a photo of the truck.
Compare the 2019 Kenworth T680
Other model years
Questions about the 2019 Kenworth T680
Is the 2019 Kenworth T680 reliable?
Owners have filed 8 complaints about the 2019 Kenworth T680, close to a typical T680 model year.
What is the most common problem with the 2019 Kenworth T680?
Brakes, with 3 complaints. Next is body (2).
How many recalls does the 2019 Kenworth T680 have?
9 recalls, covering service brakes, air, steering and electrical system.
Was there a recall on the 2019 Kenworth T680 brakes?
Yes, 4 recalls: 24V145000, 20V593000, 20V199000. Check your VIN to see if your car still needs the free repair.
VIN decoder
See the problems and recalls for an exact car
Buying a used 2019 Kenworth T680?
Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.
Check its history