Mack MP7, MP8, MP10 DOC 2013-2017: OEM 21756506

Emissions Control Designed for Mack MP-Series Engines

What Is It?

The Diesel Oxidation Catalyst (DOC) OEM 21756506 is a direct-fit emissions system component for Mack MP7, MP8, and MP10 engines manufactured between 2013 and 2017. It acts as the first stage of the aftertreatment process, oxidizing carbon monoxide (CO) and hydrocarbons (HC) in the exhaust before the flow reaches the Diesel Particulate Filter (DPF).

Why Choose OEM 21756506?

This DOC is engineered to meet Mack’s OEM standards, ensuring proper temperature control and exhaust gas treatment for consistent downstream system working conditions. It supports optimal regeneration and helps prevent buildup or clogging in the DPF.

Key Benefits

✅ Engineered for 2013–2017 MP7, MP8, MP10 Engines: Exact OEM fit and compatibility
✅ Reduces CO and HC Emissions: Converts gases into less harmful compounds
✅ Promotes DPF Efficiency: Creates ideal exhaust flow conditions for soot oxidation
✅ Built for High Heat Cycles: Durable under repeated regeneration demands
✅ Sensor-Compatible Ports: Designed for seamless integration with OEM sensors

Applications

This DOC fits Mack MP-series diesel engines found in vocational, regional haul, refuse, and municipal service trucks from 2013 to 2017. It’s ideal for fleets operating under strict emissions compliance guidelines where equipment uptime is critical.

Installation Notes

Installation should be completed by a certified technician. Inspect clamps, gaskets, and sensor connections for wear. After installation, reset ECM parameters using Mack-compatible diagnostics and ensure the system is prepared for regeneration. A manual regen may be necessary to complete the process.

Final Thoughts

The OEM 21756506 DOC is a trusted, factory-grade emissions component for Mack MP-series trucks. With its precise fitment and robust construction, it supports reliable emissions processing and contributes to the overall health of your aftertreatment system.