Audi Workshop Service and Repair Manuals

Removing and installing catalytic converter Removing

–  Pull off engine cover panel -arrows-.

–  Detach coolant expansion tank -arrow- and lay it aside with hoses connected.

–  Unplug electrical connector -1- for Lambda probe after catalytic converter -G130- and Lambda probe 1 heater, after catalytic converter -Z29- (brown connector) and move electric wiring to catalytic converter clear. –  Unplug electrical connector -2- for Lambda probe -G39- and Lambda probe heater -Z19- (black connector) and move electric wiring to catalytic converter clear.

–  Detach intake hose -1- (air cleaner/turbocharger). –  Unplug electrical connector -2- at air mass meter -G70-. –  Move clear wiring harness at air cleaner housing and remove air cleaner housing -3-.   Note Do not bend the flexible joint (de-coupling element) in the exhaust system more than 10°, otherwise it could be damaged.

–  Loosen clamp -arrow- and push to rear.

–  Detach front exhaust pipe/catalytic converter -arrows-. –  Remove bolt -1- on bracket for front exhaust pipe and then detach front exhaust pipe.

–  Unscrew nut -arrow- securing catalytic converter and turbocharger from below.

–  Unscrew nuts -arrows- securing catalytic converter and turbocharger from above. –  Lift out catalytic converter. Installing Installation is carried out in the reverse order; note the following: l  Tightening torques → Chapter „Silencers - exploded view“   Note Renew gaskets and self-locking nuts. –  Align the exhaust system so it is free of stress → Chapter.