2021 Peterbilt 367 technical service bulletins

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

• Oct 22, 2024 Warranty extension7/700 Service Agreement
• Oct 30, 2026 Service bulletinCertain chassis equipped with an engine model year 2019
• Sep 11, 2026 Service bulletinKenworth: Dealers should check the chassis list and SIR weekly for VIN changes
• Aug 13, 2026 Service bulletinThe procedure has been updated to include additional steps for verifying the software level on the vehicle...
• Aug 13, 2026 Service bulletinThe verbiage in the Introduction section has been updated.
• Jul 21, 2026 Service bulletinThis optional software update is now available for chassis equipped with EMY 2021B-2023 PACCAR MX-11 and...
• Jul 10, 2026 Service bulletinThe Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to...
• Jul 7, 2026 Service bulletinThe software is not yet available
• Jun 29, 2026 Service bulletinAn optional software update will be available on 07/06/2026 for chassis equipped with EMY 2021B-2023PACCAR...
• Jun 3, 2026 Service bulletinKW: A new recommended repair has been added to verify the software level and close the campaign in SIR.The...
• Jun 2, 2026 Service bulletinUpdated the point of contact for sourcing the MX Engine Overlay Harness Kits
• May 5, 2026 Service bulletin(KW) Certain T680 / T800 / T880 / W900 / W990 have updated GHG labels available for order and installation.
• Apr 17, 2026 Service bulletinThe attached procedures document has been updated with more detail and explanations
• Feb 11, 2026 Service bulletinThe Parts section has been updated to clarify that freight charges for safety recall orders should not be...
• Jan 31, 2026 Service bulletinProcedure pictures updated for clarity
• Nov 26, 2025 Service campaignThe right-hand shift stalk may have an improper wire harness terminal crimp within the wire harness connector
• Aug 20, 2025 OtherCondition, Chassis Affected, and Warranty sections updated with the following verbiage “E311 must be...
• Jun 7, 2025 Service bulletinNewly designed fuel injectors are available for EPA2021 compliant PACCAR MX-series engines to optimize...
• Mar 26, 2025 Service campaignAs of 03/25/2025, this campaign has resumed
• Feb 27, 2025 EmissionsVehicles equipped with PACCAR MX engines with Engine Software Version NA202 or NA206 may display a dash...
• Jan 10, 2025 Service bulletinSafety Recall Updated software and procedures are now available
• Nov 22, 2024 Service bulletinInfo Only Unnecessary starter replacements can result from customer complaints regarding engine starting...
• Nov 11, 2024 Service bulletinFix-As-Fail The window switch fails prematurely due to excessive amperage flowing through the window...
• Jul 30, 2024 Service bulletinFix As Fail The height control valve (HCV) rod on vehicles with low air leaf suspensions is prone to...
• May 21, 2024 Service campaignCampaign Certain PACCAR MX-13 engines contain bolts for the main bearing caps which may fail under certain...
• Mar 25, 2024 Service bulletinInterim
• Feb 14, 2024 Service bulletinElectrical system
• Nov 2, 2023 Service bulletinFix As Fail Updated: Two part numbers added: 1818119 DPF Delta Pressure Sensors for MX-13-2 EMY18 2200138...
• Oct 18, 2023 Service bulletinIncorrect fuel filter drain and replacement procedures on EPA21 MX-11 and MX-13 engines can result in the...
• Feb 27, 2023 Service bulletinCertain Model Year 2021-2024 chassis with PACCAR MX engines and optional fuel filter restriction virtual...
• Oct 18, 2022 Service bulletinInfo Only
• Oct 6, 2022 Service bulletinClutch pedal linkage lubrication service interval information is missing from the Service manual for Model...
• Sep 9, 2022 Service bulletinFix-As-Fail On certain chassis with Low Air Leaf Suspension or Low-Low Air Leaf Suspension, the Height...
• Aug 3, 2022 Service bulletinThe service information for Bendix Air Dryer maintenance is being updated to include new procedures.
• Aug 2, 2022 Service bulletinDuring PTO mode, the engine will not ramp up to the set RPM speed.
• Jun 10, 2022 Service bulletinInfo Only
• Mar 18, 2022 Service bulletinInformation Only – New Level 1 required tools are available to support MY21B MX engines.
• Mar 3, 2022 Service bulletinFix-As-Fail – A hill start assist (HSA) valve plumbing revision eliminates ice buildup in the HSA valve...
• Feb 4, 2022 Service bulletinA frame mounted left-hand marker light bracket interferes with the rear fuel tank fill location
• Feb 4, 2022 Service bulletinDue to major data carriers phasing out 3G networks, chassis currently utilizing first generation Peoplenet...
• Dec 17, 2021 Service bulletinInformation Only: Due to differences between the PACCAR MX-11 or MX-13 2021A and 2021B engines,...
• Sep 21, 2021 Service bulletinFix-As-Fail – Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are...
• Sep 20, 2021 Service bulletinInformation Only
• Sep 7, 2021 Service bulletin€‹Safety Recall – Hill Start Assist (HSA) Valve Clearance – the federal safety agency ID: 21V-648,...
• Jun 22, 2021 Service bulletinSafety Recall – Cummins Fuel Rail Leak – the federal safety agency ID: 21V391 / TC: 2021-323, Cummins...
• May 27, 2021 Service bulletinInformation Only
• Mar 24, 2021 Service bulletinSafety Campaign
• Feb 10, 2021 Service bulletinInformation Only – Windshield washer pumps have a high No Trouble Found rate
• Oct 1, 2020 Service bulletinFix as Fail: Peterbilt has introduced an improved mounting bracket for low mount air tanks for vehicles...
• Aug 25, 2020 Service bulletinElectrical system: 12v/24v/48v battery
• Jun 10, 2020 Service bulletinFix as Fail: For all conventional models, except 387/587, equipped with Side-of-Cab (“SOC”) exhaust and...
• Jun 8, 2020 Service bulletinInformation Only: