Engine Coolant Temperature Sensor on Radiator Outlet -G83-, REMOVING AND INSTALLING

Procedure 

• The engine is cold.

-- Briefly open the coolant expansion tank cap -arrow- and release any residual pressure in the cooling system and then close it again until it locks.

Fig 1: Identifying Coolant Reservoir Cap

Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector -1-.

Fig 2: Component Location Engine Coolant Temperature Sensor

Courtesy of AUDI OF AMERICA, LLC

-- Place a cloth underneath to catch any escaping coolant.

-- Remove the clamp -2- and Engine Coolant Temperature Sensor on Radiator Outlet -G83- -3-.

• Replace the O-ring after removing.

-- Insert the new engine coolant temperature sensor immediately so that as little coolant is lost as possible.

-- Check the coolant level. Refer to Coolant Level, Checking .