Supplies the optimal amount of urea fluid (Diesel Exhaust Fluid or DEF) to dosing module.

Introduces urea fluid into exhaust system to reduce nitrogen oxides (NOx) emission levels

Ensures proper fluid temperature and thaws DEF when below 12°F

Medium and heavy duty trucks manufactured starting on January 1, 2010 are required to meet the EPA Emission Standards. The majority of truck manufacturers chose to use selective catalytic reduction (SCR) technology to meet the standards. As part of SCR technology, Bosch provides the Denonxtronic 2.2 dosing system which injects urea into the exhaust which interacts with the SCR catalyst to reduce the NOx emissions level. The supply module contains a main filter which filters the urea being pumped into the dosing module. The filter needs to be replaced per the manufacturers’ scheduled maintenance requirements.

Particulate Matter (PM) Sensors monitor the function of the Diesel Particulate Filter (DPF) to detect excessive PM emissions.

Bosch Exhaust Gas Temperature Sensors (EGTS) measure the temperature in the exhaust system and communicate it to the vehicle's ECU. They also help protect high-quality components — such as turbos, catalytic converters and diesel particulate filters in the hot exhaust tract — and create cleaner emissions.

Bosch Nitrogen Oxide Sensors (NOx) precisely measure the NOx concentration in the exhaust gas of diesel vehicles to support efficient after treatment. They help create cleaner emissions with continuous NOx monitoring while the engine is running.