2018 Peterbilt 337 problems, complaints & recalls
Safety recalls (4)
Steering:critical Fasteners 2022-04-25 · campaign 22V277000 · 17,641 vehicles
Defect: 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.
Fix: 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.
Fuel System, Diesel:fuel Injection System:fuel Rail 2021-05-26 · campaign 21V391000 · 612 vehicles
Defect: PACCAR Incorporated (PACCAR) is recalling certain 2018-2021 Peterbilt 337, 348, 365, 367, 520, 567, Kenworth T270, T370, T440, T470, T800 and T880 vehicles. The sealing washer may not seat correctly in the pilot bore holes, allowing the high pressure fuel rail assembly to leak.
Risk: A fuel leak in the presence of an ignition source increases the risk of a fire.
Fix: Dealers will inspect the rail threads and fuel lines, and replace the rail as necessary, free of charge. Owners may contact PACCAR customer service at 1-425-828-5888 (Kenworth) or 1-940-591-4220 (Peterbilt). PACCAR's numbers for this recall are 21KWC and 21PBD.
Electronic Stability Control (Esc) 2020-04-06 · campaign 20V199000 · 460,515 vehicles
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
Risk: If the driver unknowingly operates the vehicle without the ABS functioning, there would be an increased risk of a crash.
Fix: 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.
Power Train:clutch Assembly 2018-12-21 · campaign 18V931000 · 25,556 vehicles
Defect: 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.
Fix: 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.
Service bulletins (35)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Engine 2026-09-11 · P001 · Service Bulletin/Repair Instructions
"kenworth: dealers should check the chassis list and sir weekly for vin changes. 2 chassis added to the chassis list. peterbilt: dealers should check the chassis list and sir weekly for vin changes. 10 chassis added to the chassis list."
Engine 2024-11-22 · 32-025 · Service Bulletin/Repair Instructions
info only unnecessary starter replacements can result from customer complaints regarding engine starting issues. a new starter troubleshooting guide has been created to provide a comprehensive list of starting system checks, which should reduce unnecessary starter replacements and associated warran
Suspension 2024-07-30 · 16-044 · Service Bulletin/Repair Instructions
fix as fail the height control valve (hcv) rod on vehicles with low air leaf suspensions is prone to toggling over center during rough road conditions. with full suspension articulation, hcv bracket flexes and toggles over center the hcv linkage, which results in either deflated airbags or makes th
Structure 2023-02-10 · 32-019 · Service Bulletin/Repair Instructions
fix as fail – chassis that were manufactured with certain battery cable routing brackets may experience rubbing or chafing of the battery cables.
Engine And Engine Cooling 2022-10-18 · 45-064 · Service Bulletin/Repair Instructions
info only - paccar is introducing over-the-air (ota) software updates for engine my17 and newer chassis equipped with cummins x15, x12, isx12, isx12n, l9n, px-7, and px-9 engines the technology will leverage the existing remote diagnostic cs hardware to deliver secure software updates remotely. this
Suspension 2022-09-09 · 14-043 · Service Bulletin/Repair Instructions
fix-as-fail on certain chassis with low air leaf suspension or low-low air leaf suspension, the height control valve (hcv) arm may be rubbing on other components when the bend in the arm is facing outboard. flipping the bend in the hcv arm inboard prevents the rub.
Showing the 6 most recent of 35 bulletins. Search all of them free at nhtsa.gov.
What owners report
No detailed complaint narratives on file.
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.