A4 Quattro Sedan L4-1.8L Turbo (AEB) (1998)
Catalytic Converter: Service and Repair
Three Way Catalytic Converter (TWC), removing and installing
Removing
Note:
^
Replace gaskets and self-locking nuts.
^
Flexpipe in front exhaust pipe must not be bent more than 10°, otherwise it may be damaged.
^
Disconnect harness connector for heated oxygen sensor (arrow) and set aside.
^
Remove coolant expansion tank -2 (arrows)
^
Remove wiring from Engine Coolant Level (ECL) warning switch -F66- and lay coolant expansion tank to side.
Note: Coolant hoses -1- and -3- remain connected.
^
Remove air guide duct between cowl and air cleaner housing.
^
Remove air cleaner housing cover.