Engine Oil Cooler
WARNING: This page is about a different car, the 2016 Audi A3 and 2015 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.
The engine oil cooler must not be separated from the oil filter housing. If faulty the engine oil cooler must be replaced with the oil filter housing. Refer to OIL FILTER HOUSING, REMOVING AND INSTALLING .