Diesel Exhaust Fluid Tank

WARNING: This page is about a different car, the 2018 Land Rover Range Rover, 2017 Land Rover Range Rover, and 2016 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.

The Diesel Exhaust Fluid (DEF) tank is blow moulded from high-density polyethylene and is located at the front left side of the fuel tank. The DEF tank is mounted in a shield bolted to the underside of the vehicle floor pan and an additional shield covers the DEF tank module. The DEF tank contains the DEF tank module which is welded into the tank and supplied as a unit. The tank includes a 12% unusable volume to protect the internal components as a result of fluid expansion under freezing conditions.

If the ambient temperature falls below -11°C (12°F), the DEF will freeze in the DEF tank, this will provide difficulty with the refill procedure. In order to thaw the DEF in the DEF tank, place the vehicle in a warm place for up to 2 hours before attempting to refill the tank.

The volume of the DEF tank is different on all Jaguar and Land Rover products. The DEF tank has been designed so that refills are minimized outside of the vehicle service intervals.

During extended usage in extreme temperatures, 'at altitude' or aggressive drive cycles the vehicle may consume more DEF than anticipated. In this case a warning message will be displayed in the Instrument Cluster (IC) message center to add DEF to the tank.