AutoStatsIQ
Data through Oct 2026
Model year

2023 Peterbilt 520

Body and fuel not decoded. Owner complaints on file from no date to no date.

Recalls (5)Complaints (0)Investigations (0)Bulletins (49)
Recall campaigns covering this model year5286k vehicles or units across those campaigns
Owner complaints0Not enough peers on file
Severity indexNoneCrash, fire, injury or death per 100
First 24 months0Complaints in its first two years
Complaints over time

Complaints about the 2023 Peterbilt 520 by year filed

Owner complaints about this model year, by the year they were filed with NHTSA.

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Source: NHTSA ODI complaints file. The lighter column runs through October.
Components

Complaints by component

Owner complaints by component. Hover or focus a bar for the crash, fire, injury or death count.

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Source: NHTSA ODI complaints file. A complaint can name more than one component; it is counted under the first.
Recalls

5 recall campaigns cover the 2023 Peterbilt 520

Check a specific vehicle by VIN on NHTSA's site: a campaign may cover only part of a model year's production.

Recall campaigns for the 2023 Peterbilt 520
CampaignFiledSubjectComponentVehiclesRemedy
25V-181Mar 24, 2025High voltage (HV) contactors may open, causing a sudden loss of high voltage and a loss of drive powerElectrical system238Software update
24V-915Dec 9, 2024Electrical noise and low signal to the power line carrier may cause the ECU to incorrectly process commands or stop functioningElectrical system220,764Software update
22V-939Dec 16, 2022Suspension tracking rod brackets may fail and detach from the forward drive axle, causing the axle to become unstableSuspension15,658Repair or modification
22V-631Aug 17, 2022Engine control module (ECM) may experience an internal electrical short-circuit, causing the engine to stallEngine and cooling1,601Part replacement
22V-547Jul 28, 2022Steering gears may have been assembled incorrectly, which can cause the gears to fractureSteering47,500Part replacement
Source: NHTSA ODI recalls file.
Look up a VIN at NHTSA
Owner complaints

What owners reported about the 2023 Peterbilt 520

The full text of every complaint filed with NHTSA about this model year, newest first. Complaints are filed by owners and are not verified by NHTSA; NHTSA removes personal details before publishing.

0 complaints on file.

    Source: NHTSA ODI complaints file.
    Investigations

    NHTSA has not opened an investigation on this model year

    Source: NHTSA ODI investigations file.
    All investigations
    Service bulletins

    49 manufacturer communications cover this model year

    Technical service bulletins and other notices the manufacturer sent to dealers. A bulletin is not a recall.

    • P001 Sep 11, 2026 · 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."
    • 24KWL/PBL Aug 13, 2026 · Service Bulletin/Repair Instructions
      The verbiage in the Introduction section has been updated.
    • 43-088 Aug 13, 2026 · Service Bulletin/Repair Instructions
      The procedure has been updated to include additional steps for verifying the software level on the vehicle electronic control unit (VECU2) and digital display (DD). Steps have also been added to the PACCAR Common Rail Injection 2 (PCI2) software verification.
    • 46-020 Jul 22, 2026 · Service Bulletin/Repair Instructions
      Certain unaffected chassis have been removed from the chassis population.
    • 43-088 Jul 21, 2026 · Service Bulletin/Repair Instructions
      This optional software update is now available for chassis equipped with EMY 2021B-2023 PACCAR MX-11 and MX-13 engines. This update provides customers with additional time to service their trucks before a DEF-related derate occurs. The software is being off…
    • E318 Jul 10, 2026 · Service Bulletin/Repair Instructions
      The Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to include the latest prognostics bulletin verbiage. The Warranty section has also been updated to include Peterbilt specific SRT codes for filing cross-divi…
    • 43-088 Jul 7, 2026 · Service Bulletin/Repair Instructions
      "The software is not yet available. The bulletin will be updated when more information is available."
    • 25KWD 25PBD Jul 2, 2026 · Service Campaign
      Additional US chassis have been added, along with additional Canadian chassis under identical safety recall 26PACB.
    • 43-088 Jun 29, 2026 · Service Bulletin/Repair Instructions
      "An optional software update will be available on 07/06/2026 for chassis equipped with EMY 2021B-2023PACCAR MX-11 and MX-13 engines. This update provides customers with additional time to service theirtrucks before a DEF-related derate occurs. The software …
    • CE033 Jun 25, 2026 · Warranty Program/Extension
      "KW & PB 14 fuel injector part numbers (seven for MX-11 and seven for MX-13 engines) have been added to this warranty policy."
    • CE033 Jun 24, 2026 · Service Bulletin/Repair Instructions
      "KW & PB 14 fuel injector part numbers (seven for MX-11 and seven for MX-13 engines) have been added to this warranty policy."
    • 43-080 Jun 3, 2026 · Service Bulletin/Repair Instructions
      "KW: A new recommended repair has been added to verify the software level and close the campaign in SIR.The repair procedure has been updated with additional note boxes for clear instructions. PB: The repair procedure has been updated with additional note …
    • 46-028 May 14, 2026 · Service Campaign
      Certain Peterbilt Model 520 BEV chassis with an Accelera Power Control and Accessory System (PCAS) were manufactured without a check valve in the power steering system.
    • E338 Apr 30, 2026 · Service Campaign
      Certain EPA21 PACCAR MX engines are equipped with PHINIA fuel injectors that do not meet PHINIA’s manufacturing specifications.
    • E326 Apr 1, 2026 · Emissions
      EPA17-24 MX Fuel Injector Connector - This bulletin has been revised to include all EPA17-24 and CARB24 PACCAR MX engines.
    • 22KWE/PBE Mar 3, 2026 · Service Bulletin/Repair Instructions
      Sheppard Recall Order Process Update - The Parts section has been updated with revised steps for opening a TCS365 Order Support – Order Inquiry case.
    • 25PACF Dec 23, 2025 · Service Bulletin/Repair Instructions
      Parts and procedures are now available for all affected chassis equipped with Vehicle Electronic Control Unit (VECU) part number Q21-1157-013-011 / Q21-1157-013-013 / Q21-1157-002-002 / Q21-1157-004-004 / Q21-1157-006-006 / Q21-1157-009-009. See attached Pa…
    • 46-019 Nov 4, 2025 · Service Bulletin/Repair Instructions
      Repair procedures and warranty information for model 520EV are now available. Certain Peterbilt 579EV and 520EV chassis have the First Responder Guide (FRG) label incorrectly showing the cut loop on the wrong side and are missing the Low Voltage Battery Dis…
    • 01-090 Nov 4, 2025 · Service Bulletin/Repair Instructions
      Repair procedures and warranty information for model 520EV are now available. The cab heater coolant system on Peterbilt 579EV and 520EV models may not deaerate properly, causing pump malfunctions and inadequate cab heating. Update coolant deaeration return…
    • 25PACF Aug 1, 2025 · Service Campaign
      Procedures are now available for Phase 1 chassis equipped with Internal Combustion Engines (ICE) and Vehicle Electronic Control Unit (VECU) part number Q21-1157-013-011 / Q21-1157-013-013. Parts and procedures for Phase 2 chassis will be available at a late…
    • CE033 Jul 3, 2025 · Warranty Program/Extension
      32 fuel injector part numbers (16 for MX-11 and 16 for MX-13) have been added to this warranty policy.
    • E318 Jun 7, 2025 · Service Bulletin/Repair Instructions
      Newly designed fuel injectors are available for EPA2021 compliant PACCAR MX-series engines to optimize engine performance. Injectors must be replaced as a full set (6 injectors) and associated software must be updated at the same time.
    • 98-030 May 31, 2025 · Service Bulletin/Repair Instructions
      5/29/2025: A new Ethernet Multiplexed Architecture (EMUX) Service Tool Kit service manual (SM034-022) has been released to provide general use information. The new EMUX Service Tool Kit improves cab & chassis electrical troubleshooting efficiency, while red…
    • 25PBC Apr 8, 2025 · Service Bulletin/Repair Instructions
      Safety Recall – Interim Notification Certain Battery Electric Vehicle (BEV) chassis equipped with certain Accelera High Voltage Interlock Loop (HVIL)circuit configurations may experience a sudden loss of high voltage power with unintended opening of electri…
    • 46-016 Apr 30, 2025 · Service Campaign
      4/29/2025: Campaign A software update is available for 520EV and 579EV Battery Electric Vehicles. This software update corrects or improves certain functions. Software update procedures have been revised. Campaign start date is 12/05/2024. Campaign A sof…
    • 25PBC Apr 30, 2025 · Service Bulletin/Repair Instructions
      Certain Peterbilt Battery Electric Vehicle (BEV) chassis equipped with certain Accelera High Voltage Interlock Loop(HVIL) circuit configurations may experience a sudden loss of high voltage power with unintended opening of electrical contractors, which may …
    • 43-080 PB Mar 26, 2025 · Service Campaign
      As of 03/25/2025, this campaign has resumed. Software updates are now available to complete this campaign.
    • E327 Feb 27, 2025 · Emissions
      "Vehicles equipped with PACCAR MX engines with Engine Software Version NA202 or NA206 may display a dash STOP lamp incorrectly. PCI-2 software on these chassis must be reverted from NA202 to NA201 (Pack 2 injectors) or from NA206 to NA191 (Pack 1 injectors…
    • 46-013 Feb 5, 2025 · Service Campaign
      Certain Peterbilt 579EV and 520EV Battery Electric Vehicles were built prior to the availability of certain labels and Low Voltage Distribution System (LVDS) Components. Affected chassis will be inspected and necessary components will be installed.
    • 24PBL Jan 10, 2025 · Service Bulletin/Repair Instructions
      Safety Recall Updated software and procedures are now available. Certain Vehicle Model Year 2021-2025 Peterbilt chassis configured for trailer towing require a software update for the Bendix EC80 ABS ECU. Software update procedures for certain Battery-Elect…
    • 32-025 Nov 22, 2024 · 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…
    • 46-011 Nov 27, 2024 · Service Bulletin/Repair Instructions
      Some 579EV and 520EV BEV trucks may have loose or improperly torqued ESS gland nuts. This may cause an intermittent warning light on the dash display.
    • E290 Sep 24, 2024 · Service Bulletin/Repair Instructions
      FIX-AS-FAIL Updated to include EPA2024 compliant engines. Fuel Filters must be changed before first cleaning. EPA2021 injector cleaning is referenced in RMI for certain injector faults. Complete the procedures in E290. Discard any previous versions of E2…
    • 98-030 Sep 14, 2024 · Service Campaign
      Information Only New diagnostic tool is required to support PACCAR Ethernet Multiplexed Architecture (EMUX). The EMUX Service Tool Kit will help improve cab & chassis electrical troubleshooting efficiency, while reducing the risk of component damage.
    • 46-014 Sep 19, 2024 · Service Bulletin/Repair Instructions
      Information Only Storage guideline procedures are now available for both Medium Duty and Heavy-Duty Battery Electric Vehicles.
    • 16-044 Jul 30, 2024 · 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 res…
    • E307 Apr 19, 2024 · Service Bulletin/Repair Instructions
      CARB Emission s Manufacturer Warranty term and/or kilometers conversion displayed in certain EMY 2022-2023 PX-7 or PX-9 Operatorâ™s Manuals are incorrect.
    • E290 Nov 20, 2023 · Service Bulletin/Repair Instructions
      Updated procedures and SRT time to include Fuel Filter replacement during cleaning process. Removed in-tank additive references.
    • 46-003 Oct 31, 2023 · Service Bulletin/Repair Instructions
      A software fix for model 520EV that are not equipped with ESP (Stability Control) is now available. The currently available soft ware, part number:SCM_1p5_BC_R5p00_003, will address issues caused by software version R5.00_002 that affect Peterbilt Model 520…
    • E306 Oct 18, 2023 · Service Bulletin/Repair Instructions
      Incorrect fuel filter drain and replacement procedures on EPA21 MX-11 and MX-13 engines can result in the following: .Debris and contaminants introduced into the high-pressure fuel system. .Denial of warranty claims for injector and/or fuel system faults…
    • 45-066 Oct 17, 2023 · Service Bulletin/Repair Instructions
      A testing procedure has been created for the coolant level sensor on model 520.
    • E300 May 3, 2023 · Service Bulletin/Repair Instructions
      PACCAR will reimburse customers for the local purchase of in-tank fuel additive for EPA2021 compliant MX engines. This is a one-time reimbursement. Only customers who have received E290 injector cleaning qualify for this reimbursement. See bulletin for limi…
    • E290 Apr 3, 2023 · Service Bulletin/Repair Instructions
      FIX-AS-FAIL – Updated procedures and claim filing information. EPA2021 injector cleaning is referenced in RMI for certain injector faults. Complete the procedures in E290. Refer to E300 for in-tank additive information.
    • 51-015 Mar 22, 2023 · Service Bulletin/Repair Instructions
      RFID (Radio Frequency ID) tags are being added and used to track Non-Test Ready (NTR) trucks to efficiently locate them once they are off the production line, but still on the premises. The tags are left on the trucks which have been sold.
    • R2202 Jan 12, 2023 · Service Bulletin/Repair Instructions
      The emissions exemption expired on 12/31/2022 for certain pre-production vehicles equipped with PACCAR Model Year 2023 MX engines. Production-level engine, VECU, and Digital Display software is now available to make these vehicles compliant. New Engine Emis…
    • 63-009 Nov 1, 2022 · Service Bulletin/Repair Instructions
      Peterbilt SmartLINQ subscriptions can be renewed online via PACCAR Solutions RemoteDiagnostics web portal.
    • 03-085 Oct 19, 2022 · Service Bulletin/Repair Instructions
      This is a follow-up bulletin to shortage bulletin S017. Parts kits are now available to install the Bendix Side Collision Mitigation Radar system (BlindSpotter) on chassis that were delivered with a prewire sales code due to parts shortages. Ordering and i…
    • 45-064 Oct 18, 2022 · 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 del…
    • 13-060 Aug 3, 2022 · Service Bulletin/Repair Instructions
      The service information for Bendix Air Dryer maintenance is being updated to include new procedures.
    Source: NHTSA manufacturer communications files.
    About service bulletins