Product Overview
Volvo Mack 21756505 21212405 DOC Diesel Oxidation Catalyst
Volvo Mack DOC replacement: The Skyline VNB407 Diesel Oxidation Catalyst is a direct-fit aftermarket replacement for 21756505 and 21212405. These Volvo Mack OEM numbers are used on select compatible diesel exhaust aftertreatment configurations.
Engine applications: Designed for select Volvo D11, Volvo D13, Volvo D16, Mack MP7, Mack MP8 and Mack MP10 diesel engine applications equipped with compatible EPA10 exhaust aftertreatment systems. Common applications include select Volvo VNL, VNM and VHD models and Mack CXU, CHU, GU7 and GU8 configurations, depending on the vehicle and aftertreatment system.
Product details and configurations: Brand-new Skyline aftermarket DOC with premium stainless steel construction, no core charge, EPA compliance for applicable federal emissions applications, and a 3-Year Unlimited Mileage Warranty. Choose the DOC only or the Full Kit with one 21212522 inlet flange gasket, one 21095726 outlet flange gasket, one 21212520 mounting clamp and one 21021850 locking clamp. Free ground shipping is available within the continental United States excluding California. Orders placed before 2:00 PM Eastern may ship the same business day when inventory is available.
Volvo Mack 21756505 21212405 DOC Specifications
- Product type
- Diesel Oxidation Catalyst (DOC)
- Brand / part number
- Skyline VNB407
- Primary OEM numbers
- 21756505, 21212405
- Compatible engines
- Select Volvo D11, D13, D16 and Mack MP7, MP8, MP10 applications
- Approximate emissions era
- Select EPA10 applications, approximately 2010–2016 depending on vehicle configuration
- Housing material
- Premium stainless steel
- Weight
- 38.81 lb (17.62 kg)
- Length
- 12.87 in (326.90 mm)
- Outer body diameter
- 12.99 in (330.00 mm)
- Overall dimensions
- 12.99 x 12.99 in (330.00 x 330.00 mm)
- Condition
- Brand-new aftermarket replacement
- Core charge
- None
- Emissions compliance
- EPA compliant for applicable federal emissions applications
- Warranty
- 3-Year Unlimited Mileage Warranty
Volvo Mack 21756505 21212405 DOC Cross References
Compare the original Volvo or Mack DOC part number stamped on the catalyst housing or printed on the aftertreatment identification tag with the OEM and aftermarket cross-reference numbers below before ordering.
| Manufacturer | Cross Reference Part Numbers |
|---|---|
| Volvo Mack OEM | 21756505, 21212405 |
| Skyline | VNB407 |
| DuraFit | C20-0044 |
| Roadwarrior | C0097-ID |
| Global Emission Systems / GESi | GESi-522 |
| Dinex | 82017 |
Compatible Volvo Mack OEM Aftertreatment Assembly Numbers
The following OEM aftertreatment assembly number is associated with compatible configurations using this DOC. This is an assembly reference and should not be confused with the individual DOC part numbers listed above. Verify the original stamped DOC number, vehicle VIN, emissions-family information and complete aftertreatment configuration before ordering.
21415912
Volvo D11 D13 D16 Mack MP7 MP8 MP10 21756505 DOC Fitment
The Skyline VNB407 DOC is designed for select Volvo and Mack commercial vehicles equipped with compatible EPA10 exhaust aftertreatment systems. Exact compatibility varies by engine configuration, emissions family, model year, chassis, exhaust layout, aftertreatment assembly and original stamped DOC number.
Volvo and Mack Engine Applications
- Select Volvo D11 diesel engine applications
- Select Volvo D13 diesel engine applications
- Select Volvo D16 diesel engine applications
- Select Mack MP7 diesel engine applications
- Select Mack MP8 diesel engine applications
- Select Mack MP10 diesel engine applications
- Select EPA10 applications commonly associated with approximately 2010–2016 model years
Compatible Truck and Chassis Applications
- Select Volvo VNL applications
- Select Volvo VNM applications
- Select Volvo VHD applications
- Select Mack CXU applications
- Select Mack CHU applications
- Select Mack GU7 applications
- Select Mack GU8 applications
- Select highway, regional and vocational configurations using the matching DOC and aftertreatment assembly
Fitment verification: Always verify exact compatibility using the vehicle VIN, engine serial number, emissions-family label, aftertreatment assembly number and original stamped Volvo or Mack DOC part number before ordering.
Skyline VNB407 DOC and Installation Kit Options
Choose the configuration that best fits your installation needs. The Skyline VNB407 is available as the DOC only or as a Full Kit with the applicable installation gaskets and clamps.
| Option | Included Components |
|---|---|
| DOC with Gaskets and Clamps | 1 new Skyline VNB407 DOC, 1 21212522 inlet flange gasket, 1 21095726 outlet flange gasket, 1 21212520 mounting clamp, and 1 21021850 locking clamp. |
| DOC Only | 1 new Skyline VNB407 Diesel Oxidation Catalyst only. Installation gaskets and clamps are not included with the DOC-only option. |
Volvo Mack 21756505 21212405 DOC Key Features
- Direct-fit Volvo Mack DOC: Replaces compatible Volvo Mack 21756505 and 21212405 Diesel Oxidation Catalyst applications.
- No core charge: Brand-new aftermarket DOC with no used catalyst core return required.
- EPA compliant: Designed for supported Volvo D11, D13, D16 and Mack MP7, MP8 and MP10 aftertreatment applications.
- Stainless steel construction: Built with premium stainless steel material for heavy-duty exhaust applications.
- Full Kit available: Full Kit includes one 21212522 gasket, one 21095726 gasket, one 21212520 clamp and one 21021850 clamp.
- Free shipping: Free ground shipping within the continental United States excluding California.
- Same-day dispatch: Orders placed before 2:00 PM Eastern may ship the same business day when inventory is available.
- Warranty protection: Backed by a 3-Year Unlimited Mileage Warranty.
Signs Your Volvo Mack DOC May Need Inspection or Replacement
- More frequent or incomplete downstream DPF regeneration cycles
- Diagnostic trouble codes related to DOC catalyst efficiency or exhaust temperature performance
- Excessive soot buildup at the catalyst face or in the downstream DPF
- Oil, fuel or other contamination visible on the catalyst substrate
- Unusual exhaust odor or increased downstream DPF loading
- Physical cracking, melting, corrosion or damage to the DOC substrate or housing
These symptoms may have multiple causes and do not automatically mean the DOC must be replaced. Diagnose the complete engine and exhaust aftertreatment system before replacing the catalyst.
Skyline VNB407 Multi-Warehouse Shipping
Multi-Warehouse Dispatch: Orders ship from regional fulfillment hubs to help provide fast delivery to your repair shop or location. Orders placed before 2:00 PM Eastern may ship the same business day when inventory is available.
