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Why the Bosch DEF Urea Filter (1-457-436-088) Should Be Part of Your Regular Maintenance Schedule In the world of diesel-powered medium and heavy-duty trucks, performance and compliance go hand in hand. Since January 1, 2010, EPA Emission Standards have required trucks to significantly reduce nitrogen oxide (NOx) emissions. Most manufacturers have adopted Selective Catalytic Reduction (SCR) technology to meet these standards—and at the heart of this system lies a small but critic …

Bosch Urea Filter  For diesel medium and heavy duty trucks 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 dosing system which injects urea into the exhaust which interacts with the SCR catalyst to reduce the NOx emissions level. The supply module cont …