Bosch Diesel Exhaust Fluid (DEF) Supply Module

The Bosch Diesel Exhaust Fluid (DEF) Supply Module, also called a DEF pump module or AdBlue supply module, is a key part of the selective catalytic reduction (SCR) system on modern diesel engines. It draws DEF from the tank and delivers it at controlled pressure to the dosing system. This helps the engine reduce harmful nitrogen oxide (NOx) emissions and meet emissions standards.

Key Features:

• Pumps and pressurizes DEF for accurate delivery to the SCR dosing system
• Supports efficient NOx reduction and emissions compliance
• Engineered by Bosch, a leading supplier of diesel emissions and fuel system technology
• Built to withstand the demands of DEF exposure, temperature changes, and continuous operation
• Helps restore proper SCR system performance when the original module has failed

A failing DEF supply module can cause DEF dosing faults, SCR warning lights, reduced engine power, or failed emissions tests. Replacing it with a Bosch module helps restore reliable operation. Choose the correct part number for your application from the available options.