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2018 Peterbilt 579 problems

The most common problem on the 2018 Peterbilt 579 is electrical system. It has 2.3 times the complaints of a typical 579 model year.

Typical year2.3x the typical complaints
Owner complaints
7
Recalls
14
Service bulletins
921 warranty
Worst area
Electrical

The worst 2018 Peterbilt 579 problems

Ranked by number of owner complaints. Mileage and cost come from what owners wrote.

  • Electrical
    4
  • Brakes
    3
  • Steering
    2
  • Engine
    1
  • Suspension
    1

Problems by type

Tap a problem to see which part fails, at what mileage and in which other years.

  • Electrical
    4
  • Brakes
    3
  • Steering
    2
  • Engine
    1
  • Suspension
    1

Recalls 14

Steering: critical fastenersReported April 25, 2022 · 17,641 vehicles affected
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: wiringReported December 29, 2021 · 1,107 vehicles affected
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

Electronic stability control (ESC)Reported April 6, 2020 · 460,515 vehicles affected
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

Electrical system: 12v/24v/48v battery: cablesReported March 4, 2020 · 35,671 vehicles affected
What is wrong
PACCAR Incorporated (PACCAR) is recalling certain 2015-2020 Peterbilt 365, 389, 567, and 579 vehicles equipped with a left-hand under hood jumper terminal (option code 2539410). The positive battery jumper terminal cable may be too long, allowing it to chafe against the left front suspension spring and result in an electrical short circuit.
Risk
An electrical short circuit can increase the risk of a fire.
Remedy
PACCAR will notify owners, and dealers will inspect the battery jumper terminal cables, and replace them as necessary, free of charge. The recall began April 30, 2020. Owners may contact PACCAR customer service at 1‑940‑591‑4220. PACCAR's number for this recall is 20PBA.

Recall number 20V130000 · Recall details

Electronic stability control (ESC)Reported September 17, 2019 · 12 vehicles affected
What is wrong
Transportation Power, Inc. (TransPower) is recalling certain 2017-2018 electric trucks built on Peterbilt 579 chassis. The vehicles do not have stabilization hardware and software that interacts with the braking system. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 136, "Electronic Stability Control Systems on Heavy Vehicles."
Risk
Without a Electronic Stability Control system, there is a greater chance of loss of stability control, which increases the risk of a crash.
Remedy
TransPower will notify owners, and dealers will install an Electronic Stability Control (ESC) system, free of charge. The recall began September 26, 2019. Owners may contact TransPower customer service at 1‑858‑248‑4255.

Recall number 19V657000 · Recall details

Power train: clutch assemblyReported December 21, 2018 · 25,556 vehicles affected
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

Seat belts: front: buckle assemblyReported December 7, 2018 · 6,857 vehicles affected
What is wrong
PACCAR Incorporated (PACCAR) is recalling certain 2018 Kenworth T680 and T880, and Peterbilt 567 and 579 trucks. The seat belt buckle assemblies on these vehicles may have been glued and not sewn during manufacturing, possibly causing the assembly to come apart under load, such as in the event of a crash.
Risk
If the seat belt buckle assembly separates, it can prevent the occupant from being properly restrained in the event of a crash, increasing the risk of a crash.
Remedy
PACCAR will notify owners, and dealers will replace the seat belt buckle assemblies that were not sewn, free of charge. PACCAR issued owners an interim notification on February 4, 2019. The recall began February 28, 2019. Owners may contact PACCAR customer service at 1‑918‑259‑3258. PACCAR's numbers for this recall is 18KWG, and 18PBD.

Recall number 18V870000 · Recall details

Exterior lightingReported November 16, 2018 · 1,619 vehicles affected
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: dieselReported September 21, 2018 · 48,896 vehicles affected
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

Electronic stability control (ESC)Reported June 1, 2018 · 85,626 vehicles affected
What is wrong
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."
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 July 30, 2018. Owners may contact Peterbilt customer service at 1‑918‑259‑3258 or Kenworth customer service at 1‑425‑828‑5000.

Recall number 18V368000 · Recall details

Electrical system: instrument cluster/panelReported February 2, 2018 · 1,938 vehicles affected
What is wrong
PACCAR Incorporated (PACCAR) is recalling certain 2017-2018 Kenworth T680 and T880 trucks, and Peterbilt 567 and 579 trucks, all equipped with an automated Eaton UltraShift Plus or Eaton Advantage Transmission with right hand stalk shifter. The display that indicates which transmission gear the driver selected may display incorrectly. The display can indicate 'N' when the shifter is set into 'D' or 'R', and the as a result, the truck will not move. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 102, "Transmission Shift Lever Sequence/Starter Interlock/Transmission Braking Effect," and number 101, "Control and Displays."
Risk
A truck that does not move as expected can increase the risk of a crash.
Remedy
PACCAR will notify owners, and dealers will install a transmission software update, free of charge. The recall began on March 9, 2018. Owners may contact Kenworth customer service at 1‑425‑828‑5000 or Peterbilt customer service at 1‑940‑591‑4220. PACCAR's numbers for this recall is 18KWA and 118-A.

Recall number 18V092000 · Recall details

Power train: automatic transmission: control module (TCM/PCM/tecm)Reported December 22, 2017 · 1,222 vehicles affected
What is wrong
PACCAR Incorporated (PACCAR) is recalling certain 2018 Peterbilt 567, 579, Kenworth T680, and T880 trucks, equipped with certain Eaton Endurant and PACCAR AMT transmissions. The transmission control module (TCM) may allow the engine to crank briefly even if the transmission shifter is not in neutral. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 102, "Transmission Shift Lever Sequence/Starter Interlock/Transmission Braking Effect."
Risk
If the transmission is not in neutral when the engine begins running, there may be unintended vehicle movement, increasing the risk of a crash.
Remedy
PACCAR will notify owners, and dealers will update the TCM software, free of charge. The recall began February 6, 2018. Owners may contact Peterbilt customer service at 1‑940‑591‑4000, or Kenworth customer service at 1‑425‑828‑5000. PACCAR's numbers for this recall are 1217F and 1717KWF.

Recall number 17V840000 · Recall details

Fuel system, dieselReported July 13, 2017 · 1,737 vehicles affected
What is wrong
PACCAR Incorporated (PACCAR) is recalling certain 2017-2018 Peterbilt 367, 389, 567, 579 and 587 trucks, and 2018 Kenworth C500, T680, T800, T880 and W900 trucks equipped with Cummins ISX 15L engines. These engines have a fuel pump whose drive gear could possibly slip on its drive shaft, causing a fuel pump function loss, resulting in an engine stall.
Risk
An engine stall can increase the risk of a crash.
Remedy
Cummins will notify the vehicle purchaser, and Cummins dealers will replace the fuel pumps, free of charge. The recall began July 1, 2017. Owners may contact Cummins customer service at 1‑800‑286‑6467 or PACCAR customer service at 1‑425‑468‑7400. PACCAR's number for this recall is C1909.

Recall number 17V443000 · Recall details

Fuel system, other: delivery: hoses, lines/piping, and fittingsReported February 15, 2017 · 465 vehicles affected
What is wrong
PACCAR Incorporated (PACCAR) is recalling certain 2015-2018 Kenworth K370, T680, T880 and 2017-2018 Peterbilt 567 and 579 trucks. The plastic fuel tee fittings on these trucks may leak fuel.
Risk
A fuel leak in the presence of an ignition source can increase the risk of a fire.
Remedy
Kenworth and Peterbilt will notify owners, and dealers will replace the suspect fuel tees, free of charge. The recall began on April 13, 2017. Owners may contact Kenworth customer service at 1‑425‑828‑5000 and Peterbilt customer service at 1‑940‑591‑4000. PACCAR's numbers for this recall is 17KWA and 217-A.

Recall number 17V103000 · Recall details

See all 14 recalls for the 2018 Peterbilt 579

Defect investigations

Quarter Fender FailuresOpened September 21, 2020, closed October 14, 2021

The Office of Defects Investigation (ODI) opened this Preliminary Evaluation (PE21-015) based on one Vehicle Owner Questionnaire (VOQ) and supporting fleet reports. The reports indicated that the subject quarter fenders were prone to cracking and/or separation.After a comprehensive review of the data related to the quarter fender failures on the subject vehicles, ODI did not identify the existence of a safety-related defect trend. Quarter fender failures resulted in a warranty claim rate less than one percent (<1%) of the total vehicle population. All separations, including those due to tread separations, road hazards, etc., accounted for less than point one percent (<0.1%) of the total vehicle population.ODI discovered that the minimum recommended gap between the top of the quarter fender and the bottom of the trailer was not known or being followed. The optional quarter fenders were supplied by Fontaine Spray Systems (FSS), who recommended a two inch (2) gap. ODI analyzed the claim data using a calculated gap. A calculated gap using the top of the quarter fender flap and assuming the trailer is level with the top of the fifth wheel hitch was necessary, as PACCAR doesn't know specifically what trailer a purchaser will couple to the tractor. It is safe to assume no trailers on the market extend below the upper fifth wheel plate, but many do provide additional clearance over the wheels where the quarter fenders are located. ODI determined that 94 percent of warranty claims and 84 percent of separations violated FSS' recommendation.ODI confirmed that the VOQ vehicle and the fleet report vehicles also violated FSS' recommended gap. In one fleet the gap was negative point three inches (-0.3).PACCAR has updated its vehicle specification process and issued a customer advisory notice to existing owners. In light of the low rate of reported failures and separations, further use of agency resources does not appear to be warranted. The closing of this investigation does not constitute a finding by the federal safety agency that no safety-related defect exists. The agency reserves the right to take further action if warranted by the circumstances.

PE20015

Intermittent Loss of Power Steering AssistOpened May 1, 2020, closed March 27, 2024

On May 1, 2020, the Office of Defects Investigation (ODI) opened PE20006 to investigate complaints of intermittent loss of power steering assist in Daimler Truck North America (DTNA), Volvo Trucks of North America (Volvo) and PACCAR vehicles equipped with a ZF/TRW (TRW) THP60 steering gear. The investigation focused on 2010-2020 DTNA Freightliner Cascadia, M2 and WST; Volvo VN, VAH and VHD and PACCAR 337, 365, 389, 567, 579 model vehicles.Field reports and interviews with fleet drivers allege that high power steering fluid temperatures could result in internal seal and bearing failures causing pressure fluctuation, affecting left and right-hand turns. The inability of the driver to steer the vehicle as intended can increase the risk of a crash and injury. ODI analyzed data provided by TRW, DTNA, Volvo, and PACCAR in response to individual information request letters.ODI found that most failures occurred within the first two years and/or 50,000 miles of service.  The claim rate decreased with time and miles in service and remained less than 0.5%. ODI normalized data from each of the manufacturers and determined that there was not a substantial difference in the failures.Additionally, TRW improved a seal in the steering gear in December 2015.Trucks built on or after 2016 (as 2017 and newer model years) show a decreasing trend of failures. In view of the overall low failure rate, the nature of early-life failure, and failure rate trending downward for model years 2017 and newer, this Preliminary Evaluation (PE) is closed. 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

PE20006

Technical service bulletins for the 2018 Peterbilt 579 92

Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.

See all 92 bulletins for the 2018 Peterbilt 579

What 2018 Peterbilt 579 owners say

Most recent owner complaints, unedited.

Filed May 9, 2025 · Brakes · PA · fire

See attached document for complaint.

Filed Nov 8, 2024 · Brakes, Electrical · GA

This vehicle about 6-8 weeks ago started throwing codes for all systems above (over 100 codes). This issue affected all systems of the vehicle including but not limited to the speed and braking of the vehicle, plus the fuel system and adaptive driving systems. We took it to the dealer Performance Peterbilt in Tifton, GA. They cleared the codes and said they resolved it by replacing a NOX sensor. We left the repair shop and within 50-100 miles the exact same issue started up again. We took it back to the same shop, they worked with Paccar and determined it needed a new ECM (Computer), this was changed out and still did not resolve issue. They then changed out the main wire harness. This resolved some issues but not all issues. Now the repair dealer is stating it needs a dash wire harness. This vehicle has relatively low miles 500K and has only been serviced by Peterbilt dealers through it's life. This issue causes the vehicle to accelerate and brake randomly plus many other issues by stopping power in hauling. We have another IDENTICAL vehicle which is now doing the same thing but have not brought it into the shop yet until manufacturer can get this 1st truck fixed properly to ensure safety.

Filed Aug 12, 2024 · Electrical · CA

On 8/10/2024 our sleeper berth hvac fans abruptly quit working. After checking fuses we noticed the fan control switch was hot. After removing the panel that the switch is held in we noticed the HVAC Fan Control switch (Part# 599-5000) was charred, upon removing the switch from the plug we observed the actual plug is melted, and one of the wires on the wire harness has charring of the plastic insulation. This could have very well caught fire. I am going to have to replace the wiring harness as re-pining the plug will not solve the issue of the wire being burned and the insulation being charred. There was no warning lamps, occasionally the fan would turn off then resume.

Filed May 19, 2023 · Steering, Suspension · CA

Front axle begins popping and making metal to metal noises when hitting bumps and or turning. We took it to the shop and they found the nuts to the U-bolts that hold the leaf springs to the front axle had begun backing off and were out of torque spec. Upon receiving the truck back the front end no longer made this noise. Approximately 8 months later we are hearing the same metal on metal and popping noises that we heard previously. We have also noticed similar year Peterbilt 579's with this same noise and popping so this isn't specific to our vehicle.

Filed Jan 13, 2020 · Electrical · 36,375 miles · MI · fire

Tl* the contact owns a 2018 peterbilt 579. The contact stated that while the driver was driving, the rear brakes and turn signals failed to function. The next day the running lights on the drivers side failed, the passenger side of the turn signal and brake also failed to function. The contact stated that the main electrical harness coming out of the main computer and running the entire span underneath the cab had little to no protective sheathing/ cord wrap/ aluminum wrap protecting the wires. The harness was routed through a u-bolt type flange as well as hangs near several metal parts that, while in motion, rub against the wire causing them to fray. As a result, several items began to short out and also caused numerous wires to heat up and melt. It was discovered that the running light brake lights intern signals began to fail. The harness could cause fraying and a potential fire as well as several modules to fail. The contact called northern ohio peterbilt dealer, (1330 w trenton ave, findlay, oh 45840, (419) 423-3441) and was informed that the vehicle was over the one year hundred thousand miles for the warranty and did not assist. The vehicle was not taken to a dealer and was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 36,375.

Filed Apr 21, 2019 · Brakes, Steering · 20,000 miles · FL

Bendix wingman collision mitigation system, this system as am trying to brake the vehicle determined that the vehicle in front was closer than it really was and locked the brakes and steering, at such time the driver looses control of the vehicle completely, this was the fourth time it did this, the third time it locked the brakes I was trying to brake while a car was driving out of a driveway, second time I was trying to pass a car and it detected the car to close and locked the brakes, first time bumper to bumper it was raining, on a highway a vehicle cut in front of me tried to apply the brakes and the system locked up the brakes and steering, there was plenty of room for me to stop without this system having to lock the brakes up on me

Filed Mar 6, 2019 · Electrical · 60,000 miles · MI

The main electrical harness coming out of the main computer and running the entire span underneath the cab had little to no protective sheathing/cord wrap/aluminum wrap protecting the wires. The harness is routed through a u-bolt type flange as well as hangs near several metal parts that, while in motion, rub against the wires causing them to fray. This in turn caused several items to begin to short out and also caused numerous wires to heat up and melt. It was discovered when the drivers side headlight failed and the same side running lights came on and stayed on. This also caused the washer fluid pump to turn on and run constantly, heating it to the point of scalding to the touch. Not having any type of protective wrap around the harness could cause fraying and a potential fire as well as several modules to fail as it did in this case. *dt consumer stated peterbilt warranty(1 year/100,000 miles) was not covered under warranty.

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Questions about the 2018 Peterbilt 579

Is the 2018 Peterbilt 579 reliable?

Owners have filed 7 complaints about the 2018 Peterbilt 579, 2.3 times a typical 579 model year.

What is the most common problem with the 2018 Peterbilt 579?

Electrical system, with 4 complaints. Next is brakes (3).

How many recalls does the 2018 Peterbilt 579 have?

14 recalls, covering steering, electrical system and electronic stability control (esc).

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