Volvo DOC : OEM 21850643

Emissions System Reliability for Volvo Diesel Engines

What Is It?

The Diesel Oxidation Catalyst (DOC) OEM 21850643 is a direct-fit exhaust aftertreatment component designed for Volvo diesel engines. It is responsible for oxidizing hydrocarbons (HC) and carbon monoxide (CO) from the exhaust stream, forming a key part of the emissions control system before gases reach the Diesel Particulate Filter (DPF).

Why Choose OEM 21850643?

Manufactured to Volvo's original specifications, this DOC provides a reliable and consistent fit while supporting proper thermal conditions for downstream aftertreatment components. Its construction allows for effective emissions reduction while maintaining system integrity over time.

Key Benefits

✅ Precision OEM Fit: Tailored for Volvo diesel applications
✅ Effective Emissions Treatment: Converts HC and CO into less harmful compounds
✅ Supports DPF Functionality: Maintains proper exhaust flow and temperature
✅ Thermal Resilience: Handles the heat of continuous and passive regen cycles
✅ Sensor Port Compatibility: Fully supports OEM sensor mounting locations

Applications

This DOC is suitable for use in Volvo diesel-powered vehicles equipped with compatible aftertreatment systems. It is commonly found in long-haul and regional transport trucks that require dependable emissions compliance under regulatory standards.

Installation Notes

A certified technician should perform installation. Inspect existing hardware such as clamps and sensors for wear or damage. After installing the DOC, reset system codes and verify proper exhaust flow and regeneration readiness using Volvo-approved diagnostic tools. A manual regeneration may be required.

Final Thoughts

The OEM 21850643 DOC is a vital emissions control solution designed to maintain clean exhaust function in Volvo diesel trucks. With its OEM-grade quality and durable construction, it helps ensure regulatory compliance and reliable on-road operation.