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

WARNING: This page is about a different car, the 2022 Audi S4, 2022 Audi A4 Quattro, and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Procedure

The engine is cold.

-- Reduce the residual pressure in the cooling system, briefly open the coolant expansion tank cap -1- by releasing the retainer in direction of -arrow-.

Fig 1: Coolant Expansion Tank

Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector -2-.

Courtesy of AUDI OF AMERICA, LLC

-- Place a cloth underneath to catch leaking coolant.

-- Remove the bolt -1- and the Engine Coolant Temperature Sensor on Radiator Outlet -G83-.

Replace the O-ring after removal.

-- To prevent coolant loss, install the new coolant temperature sensor immediately.

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

Tightening Specifications

Refer to OVERVIEW - ENGINE COOLANT TEMPERATURE SENSOR