Bosch Diesel Exhaust Fluid (DEF) Heater Assembly

The Bosch Diesel Exhaust Fluid (DEF) Heater Assembly (also called a DEF heater, DEF heating pot, or SCR reservoir heater) warms the diesel exhaust fluid inside the DEF tank. DEF can freeze in cold weather. A working heater keeps the fluid liquid so the Selective Catalytic Reduction (SCR) system can keep dosing and controlling NOx emissions.

Key Features:

• Warms the DEF in the tank so the SCR system can work in cold conditions
• Helps the vehicle meet emissions requirements and avoid reduced-power or limp-mode conditions caused by a failed heater
• Built by Bosch, a leading OE supplier of diesel systems for cars, SUVs, vans and pickup trucks
• Manufactured to OE specifications and tested at the end of the line
• Designed as a direct replacement for the original DEF heater

Bosch DEF heater assemblies are sold under several part numbers. Choose the one that matches your application. A replacement heater restores reliable DEF thawing and keeps the emissions system running as designed.