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Emission Control Components

Diesel exhaust fluid heater for the selective catalytic reduction system

Emission control devices inject Diesel Exhaust Fluid (DEF) periodically into the exhaust, to convert nitrogen oxides (NOx) in the exhaust into nitrogen and water, to reduce emissions.

Spectra Premium produces all the related components that form a selective catalytic reduction system

DEF Heater

Diesel exhaust fluid heater for the selective catalytic reduction system

DEF Tank

Diesel exhaust fluid tank for the selective catalytic reduction system

Pump

Diesel exhaust fluid pump for the selective catalytic reduction system

Injector Hose / Supply Line

Diesel exhaust fluid injector hose for the selective catalytic reduction system

Injector Nozzle

Diesel exhaust fluid injector nozzle for the selective catalytic reduction system

Exhaust Ammonia Sensor Control Module

Diesel exhaust fluid exhaust ammonia sensor control module for the selective catalytic reduction system

Exhaust Ammonia Sensor

Diesel exhaust fluid exhaust ammonia sensor for the selective catalytic reduction system

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Brand-Specific Emission Component Terms

Product Specific Emission Component Terms
DEF Tank Fuel Tank Diesel Fluid Exhaust (Chrysler)
Diesel Exhaust Fluid (DEF) Tank (Volkswagen)
Exhaust Ammonia Sensor Sensor Ammonia Selective Reduction Catalytic (Chrysler)
Fluid Heater Rs Preheater (Mercedes-Benz)
Heater Element Repair Kit (Volkswagen)
Fluid Injector Hose Tube Assembly (Ford)
Exhaust Fluid Supply Line (Chrysler)
Urea Tank Injector Feed Line (Volkswagen)
Fluid Injector Nozzle Injector Assembly (Ford)
Injector Nozzle (GM)
Exhaust Fluid Injector (Chrysler)
Reduction Agent Injector (Volkswagen)
Fluid Module Diesel Exhaust Fluid Module (Chrysler)
Fluid Pump DEF Pump (Ford)
Diesel Exhaust Fluid Pump (Chrysler / Volkswagen)
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How Selective Catalytic Reduction System Works

Selective Catalytic Reduction (SCR) uses basic chemistry and a simple process to reduce nitrogen oxides, or NOx, emissions, into harmless nitrogen and water vapor.

DEF is a fluid that is injected periodically into the exhaust of the SCR system to convert NOx in the exhaust into nitrogen and water, reducing NOx levels to almost zero. It is an organic, non-toxic compound, made of 32.5% urea and 67.5% purified water.

Though harmless to humans, DEF is a highly corrosive fluid to most rubber and metals and requires specially formulated rubber compounds and stainless steel couplings for optimal handling.

When the vehicle runs out of DEF, the speed is automatically reduced and limited to 50 MPH in order to limit the NOx emission. Further escalation, including engine No Start, may occur if issue is not fixed.

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