Mack MP7, MP8, MP10 DOC : OEM 21756505

OEM DOC Solution for Mack MP-Series Engines

What Is It?

The Diesel Oxidation Catalyst (DOC) OEM 21756505 is a direct-fit component for Mack MP7, MP8, and MP10 engines. This unit serves as the first stage in the emissions system, oxidizing hydrocarbons (HC) and carbon monoxide (CO) in the exhaust stream before it reaches the Diesel Particulate Filter (DPF).

Why Choose OEM 21756505?

Manufactured to Mack's OEM specifications, this DOC ensures reliable fitment and effective emissions processing. It supports consistent exhaust flow and temperature control, helping the aftertreatment system operate smoothly and stay compliant with regulatory requirements.

Key Benefits

✅ Engineered for MP7, MP8, MP10 Platforms: OEM-fit for 2013–2017 Mack diesel engines
✅ Reduces Harmful Exhaust Gases: Oxidizes HC and CO for cleaner output
✅ Supports Downstream DPF Operation: Promotes ideal conditions for soot capture
✅ Built for Thermal Endurance: Handles repeated high-temperature regen cycles
✅ OEM Sensor Ports: Fully compatible with factory pressure and temperature sensors

Applications

This DOC is used in Mack trucks operating with MP7, MP8, or MP10 engines from the 2013–2017 model years. Common in regional haul, municipal, and construction applications, it helps maintain emissions compliance and system efficiency across demanding duty cycles.

Installation Notes

Installation should be carried out by a certified technician. Inspect clamps, mounting hardware, and sensors before installation. Once installed, use Mack-compatible diagnostic tools to reset emissions parameters and verify regeneration readiness. A manual regen may be necessary to bring the system fully online.

Final Thoughts

The OEM 21756505 DOC is a dependable emissions system component for Mack MP-series diesel engines. With its precise OEM fit and durable build, it supports clean exhaust operation and regulatory compliance across a wide range of applications.