Collection: NOx & SCR / AdBlue

NOx & SCR / AdBlue – Replacement Diesel Exhaust Aftertreatment Components

Shop replacement NOx sensors and selective catalytic reduction (SCR) system components at Shop4AllParts. Explore vehicle-specific exhaust aftertreatment parts for compatible diesel cars, SUVs, vans and commercial vehicles.

NOx sensors monitor nitrogen oxides in exhaust gases and provide information to the vehicle's engine management or exhaust aftertreatment system. Their application and installation position vary according to the vehicle.

SCR systems use a urea-based diesel exhaust fluid, commonly known as AdBlue or DEF, to help reduce nitrogen oxide emissions. In compatible systems, a dosing module introduces the fluid into the exhaust stream, where it participates in the SCR process.