VolvoEngine Parts

21574975 — Def Exhaust Fluid Pump 21574975 85021151 0444042155 For Volvo Engine D12 D16 Tad1170Ve Tad572Ve Truck Fm Fh Fmx

This is a DEF (Diesel Exhaust Fluid) pump, an essential component in modern diesel engines that injects DEF into the exhaust stream to reduce harmful NOx emissions. Manufactured to meet rigorous Volvo standards, it provides reliable fluid delivery, unlike a worn pump that may struggle to maintain pressure or deliver the correct volume. Observable symptoms of a failing DEF pump include a 'check engine' light, reduced engine power (limp mode), and increased exhaust emissions, often accompanied by DEF system error codes.

Def Exhaust Fluid Pump 21574975 85021151 0444042155 For Volvo Engine D12 D16 Tad1170Ve Tad572Ve Truck Fm Fh Fmx – Part No 21574975 – Volvo Spare Part
Part Specifications
BrandVolvo
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeDEF Pump
MaterialHigh-strength polymer and metal
ApplicationExhaust Aftertreatment System (DEF)
Service LifeReplace as needed based on diagnostic codes
CompatibilityVolvo 85021151, 0444042155
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first indication of a failing DEF pump is often the illumination of the 'check engine' or DEF system warning light, potentially followed by a reduction in engine power. If the pump continues to degrade, it may lead to inconsistent DEF injection, causing increased NOx emissions and potential regulatory non-compliance. The ultimate risk is the vehicle entering a severe limp mode or being unable to operate, impacting delivery schedules and incurring towing costs.

Installation Tip

Ensure the DEF tank is clean and free of any sediment before installing the new pump to prevent immediate contamination. Avoid overtightening the pump mounting bolts, as this can damage the pump housing or the tank.

Service Note

When replacing the DEF pump, always inspect and clean or replace the DEF filter, and check the DEF lines for any signs of blockage or leaks.