Product Overview
Cummins 5287191 4965243 4330062 PACCAR Q621301 DOC
Interchange References: Cummins 5287191, 5287191NX, 5287191RX, 4965243, 4965243NX, 4965243RX, 4330062, A035G674, PACCAR Q621301, Skyline MN0402, FSS Emission Products MN0402-FSS, Roadwarrior C0028-ID, DuraFit C20-0003, Dinex 58015, Global Emission Systems GESi-502
Replace a worn or damaged Cummins 5287191, 4965243, or 4330062 Diesel Oxidation Catalyst DOC with this brand-new Skyline aftermarket DOC filter. This direct-fit replacement also cross-references Cummins A035G674 and PACCAR Q621301 and is intended for select Cummins ISM and ISL diesel engine applications using compatible EPA07 exhaust aftertreatment systems. This DOC has no core charge, includes a 3-year unlimited mileage warranty, is EPA compliant, and ships free within the continental United States.
Cummins PACCAR DOC Cross References
Cummins 5287191, 4965243, and 4330062 DOC filters cross-reference with Cummins A035G674, PACCAR Q621301, Skyline MN0402, and the additional aftermarket replacement numbers listed below.
| Manufacturer | Cross Reference Part Numbers |
|---|---|
| Cummins OEM | 5287191, 5287191NX, 5287191RX, 4965243, 4965243NX, 4965243RX, 4330062, A035G674 |
| PACCAR OEM | Q621301 |
| Skyline | MN0402 |
| FSS Emission Products | MN0402-FSS |
| Roadwarrior | C0028-ID |
| DuraFit | C20-0003 |
| Dinex | 58015 |
| Global Emission Systems | GESi-502 |
Cummins ISM ISL DOC Engine Compatibility & Fitment Guide
This Skyline DOC filter is intended for select commercial diesel applications equipped with compatible Cummins ISM or ISL 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 Cummins ISM and Cummins ISL diesel engines
- Approximate Model Years: Select 2007–2009 applications
- Approximate Emissions Era: EPA07 exhaust aftertreatment applications
- Common Applications: Select highway, regional-haul, vocational, bus, and commercial chassis configurations
- Compatible Complete-Unit Numbers: 5287191, 5287191NX, 5287191RX, 4965243, 4965243NX, 4965243RX, 4330062, A035G674, and Q621301
Choose Your Kit Configuration
Select the configuration from the product options that best fits your installation needs.
- Full Kit (Best Value): Includes one (1) brand-new DOC unit, two (2) 2871453 installation gaskets, and two (2) 2871863 heavy-duty clamps
- DOC Only: Includes one (1) DOC only. Installation gaskets and clamps are not included
DOC Technical Specifications
| Measurement Parameter | Specification Value |
|---|---|
| Product Type | Diesel Oxidation Catalyst DOC inlet module |
| Common Search Terms | DOC, DOC Filter, Diesel Oxidation Catalyst |
| Primary OEM Part Numbers | 5287191, 4965243, 4330062, Q621301 |
| Manufacturer Part Number | Skyline MN0402 |
| Engine Compatibility | Select Cummins ISM and ISL applications |
| Material | Stainless steel |
| Weight | 27.78 lb (12.61 kg) |
| Overall Length | 6.94 in (176.28 mm) |
| Outer Body Diameter | 13.17 in (334.60 mm) |
| Core Condition | Brand-new aftermarket unit |
| Core Charge | No core charge |
| Warranty | 3-year unlimited mileage warranty |
| Exhaust Emission Norm | EPA07 compliant |
Key Features
- Direct-fit replacement for the listed Cummins and PACCAR OEM applications
- Brand-new Skyline aftermarket Diesel Oxidation Catalyst DOC
- No core charge or used catalyst return required
- Stainless steel construction
- EPA compliant for applicable federal emissions applications outside California
- Available Full Kit with two 2871453 gaskets and two 2871863 clamps
- Ships free within the continental United States
- 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 response
- Excessive soot loading in the downstream DPF
- Fuel, oil, or other contamination visible at the catalyst inlet
- Increased exhaust backpressure or reduced engine performance
- Cracking, melting, corrosion, or other physical damage to the catalyst substrate or housing
Multi-Warehouse Dispatch
Orders ship from regional fulfillment hubs to help provide fast delivery to your repair shop or location.
*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 gaskets or clamps included.
