Catalytic Converter: Service and Repair

Front Exhaust Pipe with Catalytic Converter

Removing

- Remove the air filter housing. Refer to => [ Air Filter Housing ] Air Filter Housing.

- Disconnect the heated oxygen sensor connector - arrow - and free up the wire.






- From above, remove the front exhaust pipe to turbocharger nuts - arrows -.






- Remove the nuts accessible from below for front exhaust pipe to turbocharger.

- Remove the nuts - arrows - and slightly pull the vehicle floor cover downward.






with Engine Code CCTA






- Disconnect the electrical connector - arrow - on the right side of the underbody.

- Remove the electrical connector out of the bracket and free up the electrical wire to the oxygen sensor.

with Engine Code CBFA






- Unclip the wires - arrows -, remove the bracket - 2 - and disconnect the connectors - 1 and 3 -.

Continuation for All






- Remove the exhaust system suspended mount bolts - arrows -.

- Remove the front tunnel brace nuts - arrows - and brace.







Danger of causing damage to the coupling elements.

• Do not bend the coupling element in the front exhaust pipe more than 10°.

- Loosen the clamping sleeve - 1 - and push it rearward.

- Remove the front exhaust pipe with catalytic converter.

Installing

Install in the reverse order of removal. Note the following:

• Coat the turbocharger stud bolts with hot bolt paste (G 052 112 A3).

• Replace the gaskets and self-locking nuts.

• Install the exhaust system free of stress. Refer to => [ Exhaust System, Aligning ] Procedures.

Tightening Specifications

GTI (from 2010) with Engine Code CCTA, refer to => [ Exhaust System Overview ] Exhaust System Overview.

Engine Code CBFA, refer to => [ Exhaust System Overview ] Exhaust System Overview.