2009-2010 Volkswagen Diesel Exhaust Fluid Tank / Def Reservoir 7L6131878

The Diesel Exhaust Fluid Tank (DEF Reservoir) is an essential OEM component designed specifically for Volkswagen Touareg models equipped with the 3.0L TDI V6 Diesel engine from the years 2009 and 2010. This factory-original reservoir, part number 7L6131878, plays a critical role in the diesel emission control system by storing urea-based diesel exhaust fluid. Properly functioning, it helps reduce nitrogen oxide (NOx) emissions, ensuring compliance with environmental regulations. Commonly referred to as the DEF Tank, it replaces worn or damaged units, resolving issues related to DEF supply to the selective catalytic reduction (SCR) system, which can impair engine performance when malfunctioning. The reservoir’s robust construction provides durability, making it an integral part of your vehicle’s emission system. Ensure your Touareg runs efficiently with this authentic OEM part sourced directly from salvage operations, guaranteeing that you receive a reliable and high-quality replacement.