Dorman 904-378 Diesel Exhaust Fluid (DEF) Heater Replacement for Volkswagen Jetta, Passat, Tiguan | OE FIX Solution | Winter Cold Weather Protection

The factory DEF heater on certain vehicles often fails from fluid intrusion. This Dorman OE FIX solution modifies the OEM design to address this failure point and increase reliability. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Volkswagen Passat: 2012, 2013, 2014, 2015]

Upgraded replacement - this diesel exhaust fluid (DEF) heater features additional protection from fluid intrusion

Restores performance - designed to match the fit and function of the original equipment part

Thoroughly tested - each design undergoes cyclical heater element fatigue testing

Trustworthy quality - backed by team of engineers in the United States

Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool