Volvo / Mack 20864132 21850647 Q621421 DOC Filter Module

Volvo 20864132 21850647 Mack D16 MP10 Diesel Oxidation Catalyst DOC

Interchange References: 20864132, 21850647, Q621421, VN0603, VN0603-FSS, C20-0043, C0116-ID, GESi-554, 21371339, 21445458

Volvo Mack 20864132 21850647 DOC Cross Reference Table

How to Verify Your Unit: Use the cross-reference table below to compare the original stamped OEM part number on your DOC canister, emissions tag, or catalyst housing with compatible OEM and aftermarket interchange numbers.

Replace a worn or damaged Volvo 20864132 21850647 Diesel Oxidation Catalyst DOC with this brand-new Skyline aftermarket DOC filter. This direct-fit replacement is intended for select Volvo D16 and Mack MP10 heavy-duty diesel engine applications using compatible EPA07 exhaust aftertreatment systems, including select highway, line-haul, heavy-freight, and severe-duty vocational configurations. This DOC has no core charge, includes a 3-year unlimited mileage warranty, is EPA compliant, and ships free within the continental United States.

Volvo D16 Mack MP10 DOC Fitment Guide

This Volvo Mack DOC filter is intended for select heavy-duty diesel applications equipped with compatible Volvo D16 or Mack MP10 EPA07 exhaust aftertreatment systems. Exact compatibility varies by engine calibration, emissions family, model year, chassis configuration, exhaust layout, and the original stamped DOC part number.

• Engine Platforms: Select Volvo D16 16.0L and Mack MP10 heavy-duty diesel engines.
• Approximate Model Years: Select 2007 to 2009 applications, depending on vehicle configuration.
• Approximate Emissions Era: EPA07 exhaust aftertreatment applications.
• Common Chassis Applications: Select highway, line-haul, heavy-freight, and severe-duty vocational configurations.
• Compatible OEM Numbers: See the Volvo Mack OEM cross-reference table above for compatible original equipment and service part numbers.

Choose Your Kit Configuration

Select the configuration from the product options above that best fits your installation needs:

• Full Kit (Best Value): Includes one (1) brand-new DOC unit, two (2) 21371339 installation gaskets, and two (2) 21445458 heavy-duty clamps.
• DOC Only: Includes one (1) DOC only. Installation gaskets and clamps are not included.

DOC Technical Specifications

Key Features

• Direct-Fit Volvo Mack DOC: Replaces the Volvo Mack Diesel Oxidation Catalyst applications listed in the cross-reference table above.
• Brand-New Skyline Aftermarket DOC: No used catalyst return required.
• No Core Charge: Brand-new aftermarket DOC with no dirty core return, core tracking paperwork, or return freight expense.
• EPA Compliant: Designed for supported Volvo D16 and Mack MP10 EPA07 aftertreatment applications outside California.
• Stainless Steel Construction: Built with stainless steel material for heavy-duty commercial exhaust systems.
• Available Full Kit: Full Kit option includes two (2) 21371339 installation gaskets and two (2) 21445458 heavy-duty clamps.
• Free Shipping: Free ground shipping within the continental United States.
• Warranty Protection: Backed by a 3-year unlimited mileage warranty.

Signs Your DOC Needs Replacement

• Difficulty reaching or maintaining exhaust temperatures needed for DPF regeneration.
• Frequent, incomplete, or unsuccessful regeneration cycles.
• Diagnostic trouble codes related to DOC catalyst efficiency or exhaust temperature performance.
• Excessive soot loading in downstream DPF.
• Fuel, oil, or other contamination visible at catalyst inlet.
• Increased exhaust backpressure or reduced engine performance.
• Physical cracking, melting, corrosion, or damage to DOC substrate/housing.

*Note: Always verify exact compatibility using your vehicle's VIN number or original stamped OEM part number on the unit before placing an order.

Disclaimer: Product images are for reference only. Each selected option includes one (1) physical DOC unit. The Full Kit option includes one DOC with the listed gaskets and clamps. The DOC Only option includes one DOC only, with no installation gaskets or clamps included.