Service bulletins for the 2023 Mack MD
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.
69 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
Only bulletins with component: Fuel system are shown. Show all
| CBR 2107-21 202505 | 2025-06-02. Service bulletin. FUEL/PROPULSION SYSTEM; ENGINE. Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions and Newer |
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| M-258-012 202309 | 2023-10-03. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, DIESEL:DELIVERY:PRESSURE SENSOR; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. TSB: Aftertreatment Diesel Exhaust Fluid (DEF) Tank, Level Sensor, Replacement |
| S7675 | 2023-01-04. Service bulletin. FUEL SYSTEM, DIESEL. MMD Incorrect Fuel Tank Label |
| KC-2157 | 2022-07-05. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE. Aftertreatment Hydrocarbon Injector (AHI) Troubleshooting Guide - US10+OBD13 And Newer Emissions. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.