{"vehicle":{"id":"2020_peterbilt_520","year":2020,"make":"Peterbilt","model":"520"},"as_of":"2026-10-19","counts":{"count":52,"by_type":[{"id":"service_bulletin","name":"Service bulletin","count":48},{"id":"service_campaign","name":"Service campaign","count":2},{"id":"warranty_extension","name":"Warranty extension","count":1},{"id":"emissions","name":"Emissions","count":1}],"components":[{"id":"engine","name":"Engine","count":16},{"id":"electrical","name":"Electrical system","count":13},{"id":"equipment","name":"Equipment and accessories","count":9},{"id":"brakes","name":"Brakes","count":6},{"id":"powertrain","name":"Transmission and driveline","count":4},{"id":"structure-body","name":"Body and frame","count":3},{"id":"steering","name":"Steering","count":3},{"id":"exhaust-emissions","name":"Exhaust and emissions","count":2},{"id":"fuel-system","name":"Fuel system","count":2},{"id":"visibility","name":"Glass, wipers and mirrors","count":2},{"id":"driver-assistance","name":"Driver assistance","count":1},{"id":"labels-manuals","name":"Labels and manuals","count":1},{"id":"lighting","name":"Lighting","count":1},{"id":"parking-brake","name":"Parking brake","count":1},{"id":"software","name":"Software","count":1},{"id":"suspension","name":"Suspension","count":1},{"id":"wiper","name":"Wipers and washers","count":1}],"codes":[{"id":"P1644","name":"P1644","count":1}],"topics":[{"id":"maintenance","name":"maintenance","count":1}]},"bulletins":[{"nhtsa_id":11038569,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-10-17","date":"2026-10-14","document_id":"42-070","mfr_campaign":null,"component":"UNKNOWN OR OTHER","summary":"Due to supplier constraints, an authorized aftermarket surge tank has been made available.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11038569-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11038569-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11038569"},{"nhtsa_id":11037541,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-09-29","date":"2026-09-11","document_id":"P001","mfr_campaign":null,"component":"ENGINE","summary":"\"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.\"","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11037541-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11037541-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11037541"},{"nhtsa_id":11036289,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-08-20","date":"2026-08-13","document_id":"43-088","mfr_campaign":null,"component":"ENGINE","summary":"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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11036289-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11036289-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11036289"},{"nhtsa_id":11035202,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-07-23","date":"2026-07-21","document_id":"43-088","mfr_campaign":null,"component":"ENGINE","summary":"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 offered to customers in alignment with recently updated regulatory agency guidance.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11035202-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11035202-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11035202"},{"nhtsa_id":11035108,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-07-21","date":"2026-07-07","document_id":"43-088","mfr_campaign":null,"component":"ENGINE","summary":"\"The software is not yet available. The bulletin will be updated when more information is available.\"","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11035108-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11035108-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11035108"},{"nhtsa_id":11034394,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-07-02","date":"2026-06-29","document_id":"43-088","mfr_campaign":null,"component":"ENGINE","summary":"\"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 is being offered to customers in alignment withrecently updated regulatory agency guidance.\"","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11034394-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11034394-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11034394"},{"nhtsa_id":11032284,"type":"emissions","type_name":"Emissions","date_added":"2026-05-06","date":"2026-04-01","document_id":"E326","mfr_campaign":"E326","component":"ENGINE; ELECTRICAL SYSTEM","summary":"EPA17-24 MX Fuel Injector Connector - This bulletin has been revised to include all EPA17-24 and CARB24 PACCAR MX engines.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11032284-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11032284-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11032284"},{"nhtsa_id":11019172,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-06-05","date":"2025-05-31","document_id":"98-030","mfr_campaign":"98-030","component":"ELECTRICAL SYSTEM","summary":"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 reducing risk of component damage. 4/29/2025: The Ethernet Multiplexed Architecture (EMUX) Service Tool Kit and individual kit components are now available to order. Dealers that have received their first kit may order an additional kit. The EMUX Service Tool Kit Part number has been updated to match OEM drawings (P74-1045-001). Individual kit component part numbers can be found in the Reference Bill of Materials sheet. The new EMUX Service Tool Kit improves cab & chassis electrical troubleshooting efficiency, while reducing risk of component damage. 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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11019172-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11019172-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11019172"},{"nhtsa_id":11017898,"type":"service_campaign","type_name":"Service campaign","date_added":"2025-05-06","date":"2025-04-30","document_id":"46-016","mfr_campaign":"46-016","component":"ELECTRICAL SYSTEM","summary":"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 software update is available for 520EV and 579EV Battery Electric Vehicles. This software update corrects or improves certain functions. Campaign start date is 12/05/2024.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11017898-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11017898-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11017898"},{"nhtsa_id":11010926,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-12-03","date":"2024-11-22","document_id":"32-025","mfr_campaign":"32-025","component":"ENGINE","summary":"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 warranty claims. Engine starting system warranty claims now require a completed Starter Checklist, a Battery Pack Midtronics Report, and a Cable Drop Midtronics Report. Claims filed without these documents may be denied.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11010926-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11010926-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11010926"},{"nhtsa_id":11009757,"type":"warranty_extension","type_name":"Warranty extension","date_added":"2024-11-05","date":"2024-10-22","document_id":"7-700","mfr_campaign":"7-700","component":"POWER TRAIN; ENGINE","summary":"7/700 Service Agreement - Letter Only.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11009757-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11009757-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11009757"},{"nhtsa_id":11008569,"type":"service_campaign","type_name":"Service campaign","date_added":"2024-10-05","date":"2024-09-14","document_id":"98-030","mfr_campaign":"98-030","component":"ELECTRICAL SYSTEM","summary":"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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11008569-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11008569-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11008569"},{"nhtsa_id":11008566,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-10-05","date":"2024-09-19","document_id":"46-014","mfr_campaign":"46-014","component":"UNKNOWN OR OTHER","summary":"Information Only Storage guideline procedures are now available for both Medium Duty and Heavy-Duty Battery Electric Vehicles.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11008566-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11008566-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11008566"},{"nhtsa_id":11005516,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-08-02","date":"2024-07-30","document_id":"16-044","mfr_campaign":"16-044","component":"SUSPENSION","summary":"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 them unable to inflate. Fix-as-fail start date is 07/30/2024.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11005516-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11005516-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11005516"},{"nhtsa_id":10240236,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-08-03","date":"2023-07-14","document_id":"R2304","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"Quality and Volume Validation vehicles built for the 520 VMUX program between July 2019 and December 2020 are eligible for a retrofit of the digital display to a production intent unit that features updated base software, secured hardware, and the ability to be updated with software released after February 2021.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10240236-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10240236-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10240236"},{"nhtsa_id":10225578,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-11-02","date":"2022-10-18","document_id":"45-064","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING","summary":"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 will reduce downtime and save on maintenance costs for eligible vehicles.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10225578-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10225578-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10225578"},{"nhtsa_id":10219235,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-09-06","date":"2022-08-03","document_id":"13-060","mfr_campaign":null,"component":"SERVICE BRAKES","summary":"The service information for Bendix Air Dryer maintenance is being updated to include new procedures.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10219235-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10219235-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10219235"},{"nhtsa_id":10217134,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-08-04","date":"2022-07-12","document_id":"01-085","mfr_campaign":null,"component":"VISIBILITY","summary":"Info Only – Certain 520 model chassis built between 2014 and 2021, and equipped with the Red Dot HVAC system, may have service port spacing which will not allow the connection of a pressure gauge to both the high and low side service ports simultaneously. A specific tool is available from the supplier that will allow a technician to bypass this design issue.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10217134-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10217134-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10217134"},{"nhtsa_id":10208758,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-03-04","date":"2022-02-04","document_id":"51-013","mfr_campaign":null,"component":"EQUIPMENT","summary":"Due to major data carriers phasing out 3G networks, chassis currently utilizing first generation Peoplenet Mobile Gateway (PMG001) will experience severe 3G service degradation as early as January of 2022. Chassis currently utilizing 3G antennas as a primary antenna may experience this degradation.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10208758-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10208758-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10208758"},{"nhtsa_id":10207153,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-02-04","date":"2022-01-10","document_id":"R2103","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING","summary":"Retrofit - The emissions exemption will be expiring on 5/15/2022 for certain pre-production vehicles equipped with PACCAR MX-11 and MX-13 EPA 2021 Emissions engines. Production-level components are now available to make these vehicles compliant.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10207153-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10207153-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10207153"},{"nhtsa_id":10201965,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-10-05","date":"2021-09-21","document_id":"43-071","mfr_campaign":null,"component":"FUEL SYSTEM, DIESEL","summary":"Fix-As-Fail – Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are available. As a temporary solution, after PACCAR confirms a DEF sensor is not available, a temporary software update will allow a vehicle to continue operation with a failed DEF sensor by disabling the DEF sensor diagnostics.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201965-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201965-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10201965"},{"nhtsa_id":10201947,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-10-05","date":"2021-09-23","document_id":"21 PBK","mfr_campaign":null,"component":"SERVICE BRAKES, AIR","summary":"Safety Recall – Certain Model 520 trucks may have been built without a quick release (QR) valve. The absence of this valve could affect rear brake timing on certain vehicles equipped with a tri-drive or liftable tag axle and Dual Seated or Right Hand Stand-Up steering configurations. Vehicles will be inspected and, if necessary, a QR valve will be installed.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201947-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201947-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10201947"},{"nhtsa_id":10198816,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-07-06","date":"2021-06-21","document_id":"45-062","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING","summary":"Fix-As-Fail – PX9 oil pan may leak due to improper hardware. Revised hardware will resolve the leak.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10198816-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10198816-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10198816"},{"nhtsa_id":10198809,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-07-06","date":"2021-06-22","document_id":"21-PBD","mfr_campaign":null,"component":"FUEL SYSTEM, GASOLINE","summary":"Safety Recall – Cummins Fuel Rail Leak – NHTSA ID: 21V391 / TC: 2021-323, Cummins Recall: C2423. Cummins PX9 and ISX12 fuel rails may leak around a sealing washer, potentially resulting in fuel leaks. Undetected prolonged diesel fuel spray in the presence of an ignition source may increase the risk of fire.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10198809-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10198809-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10198809"},{"nhtsa_id":10191380,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-05-03","date":"2021-02-25","document_id":"34-074","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"The current chassis harness connector contains a wire that is no longer necessary with the latest electrical architecture. The presence of the wire could result in a false fault code.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10191380-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10191380-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10191380"}],"next_cursor":"2021-05-03_10191380","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}