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.

Courtesy of AUDI OF AMERICA, LLC

Audi A3 from MY 2021/Q2 from MY 2016/Q3 from MY 2019/TT from MY 2015:

-- Remove the noise insulation. Refer to OVERVIEW - NOISE INSULATION .

Continuation for All Vehicles:

Fig 1: Component Location Engine Coolant Temperature Sensor

Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector -1-.

-- Place a cloth underneath to catch leaking coolant.

-- Remove clamp -2- and Engine Coolant Temperature Sensor on Radiator Outlet -G83- (example illustration).

• Replace the O-ring after removal.

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

-- Check the clamp for secure fit.

-- Check the coolant level. Refer to COOLANT LEVEL, CHECKING AND FILLING .

Tightening Specifications

• Refer to OVERVIEW - NOISE INSULATION .