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: Engine are shown. Show all
| KC-2158 | 2022-06-07. Service bulletin. ENGINE AND ENGINE COOLING. Selective Catalytic Reduction (SCR) Muffler Troubleshooting Guide - US10+OBD13 And Newer Emissions |
|---|---|
| KC-2157 | 2022-06-07. Service bulletin. ENGINE AND ENGINE COOLING. Aftertreatment Hydrocarbon Injector (AHI) Troubleshooting Guide - US10+OBD13 And Newer Emissions |
| KC-2116 | 2022-06-07. Service bulletin. ENGINE AND ENGINE COOLING. NOx Sensor Troubleshooting Guide - US10+OBD13 And Newer Emissions |
| KC-652 | 2022-06-07. Service bulletin. ENGINE AND ENGINE COOLING. Mack Low Oil Pressure Diagnostic Process For 11 Liter Engines |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.