Audi Workshop Service and Repair Manuals > A3 Mk2 > Power unit | 4-cylinder direct petrol injection engine (2.0 ltr. 4-valve turbo), mechanics | Exhaust system | Exhaust system, engines with code letters AXX, BPY, BWA | Removing and installing front exhaust pipe with catalytic converters and front silencer, engines with code letters AXX, BPY, BWA

Removing and installing front exhaust pipe with catalytic converters and front silencer, engines with code letters AXX, BPY, BWA

Special tools and workshop equipment required

t	Spring type clip pliers -VAS 5024 A-

Removing

–	Detach engine cover panel with air cleaner → Rep. gr.24.

–	Unplug electrical connector -arrow- for Lambda probe -G39- and Lambda probe heater -Z19- and move wiring clear.

–	Unscrew securing nuts -arrows- of front exhaust pipe/turbocharger accessible from above.

Four-wheel drive vehicles

–	Remove propshaft (front) → Rep. gr.39.

All models:

–	Remove underbody cover (right-side) -arrows-.

–	Unplug electrical connector -arrow- for Lambda probe after catalytic converter -G130- and Lambda probe 1 heater after catalytic converter -Z29- and move wiring clear.

–	Unscrew remaining securing nuts -arrows- for front exhaust pipe/turbocharger from below.

–	Remove support for front exhaust pipe with catalytic converter (unscrew bolts -1 and 2-).

Note

To avoid damage, the flexible joints in the front exhaust pipe must not be bent more than 10 °.

–	Separate exhaust system at clamp -arrows-.

–	Remove front cross-piece for underbody -arrows-.

–	Unbolt bracket for exhaust system -arrows-.

–	Remove front exhaust pipe with catalytic converters and front silencer.

Installing

Installation is carried out in the reverse order; note the following:

l	Tightening torques → Chapter

Note

Renew gaskets and self-locking nuts.

–	Install propshaft (front) → Rep. gr.39.

–	Align the exhaust system so it is free of stress → Chapter.

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