VolvoElectrical Parts

21567736 — Nitrogen Oxide Sensor Voe21567736 21567736 5Wk9 6664E For Volvo Truck Fl Fe Fh Fm

This Nitrogen Oxide (NOx) sensor is a critical component of the exhaust aftertreatment system, precisely measuring the amount of nitrogen oxides in the exhaust gases. It ensures the engine control module can accurately adjust the DEF injection rate to meet emissions standards. A failing sensor will lead to increased emissions and potential engine derating, while a worn sensor may provide inaccurate readings causing the engine to run inefficiently. Operators may observe a check engine light, reduced engine power, or increased exhaust smoke.

Nitrogen Oxide Sensor Voe21567736 21567736 5Wk9 6664E For Volvo Truck Fl Fe Fh Fm – Part No 21567736 – Volvo Spare Part
Part Specifications
BrandVolvo
CategoryElectrical 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

Disconnect main battery before working on electrical components. Use dielectric grease on all connector pins. Check ground connections — most electrical faults trace to poor grounds. Test with multimeter before installing new parts.

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

Part TypeNitrogen Oxide (NOx) Sensor
MaterialHigh-temperature resistant ceramic and metal alloys
ApplicationExhaust aftertreatment system
Service LifeReplace every 100,000 miles or as indicated by diagnostic codes
CompatibilityVolvo specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing NOx sensor is often a check engine light or a specific emissions-related diagnostic trouble code. If ignored, the engine's performance may gradually decrease due to incorrect fuel or DEF dosing. Continued operation with a faulty sensor can lead to excessive emissions and potential damage to the aftertreatment system.

Installation Tip

Ensure the exhaust system is cool before attempting removal to avoid burns and potential damage to threads. Do not overtighten the sensor during installation, as this can damage the sensor housing or exhaust manifold threads.

Service Note

Inspect the Diesel Exhaust Fluid (DEF) injector and lines for any signs of clogging or leakage when replacing the NOx sensor.