Left front exhaust pipe with catalytic converter, removing and installing (vehicles with manual transmission): Removing
WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
- Remove rear engine cover (arrows).
- Remove cover -1- in engine compartment (left side).
- Remove coolant reservoir (arrow)
- Disconnect electrical wiring to Engine Coolant Level (ECL) warning switch -F66- at bottom of coolant reservoir.
- Tie coolant reservoir with connected coolant hoses -1 to 3- to side.
- Remove heat shield for harness connectors at left of bulkhead, if installed.
- Remove harness connectors -1 to 4- from bracket at left of bulkhead.
- Disconnect electrical harness connectors -1- and -4-.
- Guide wires to oxygen sensors downward.
- Remove nut -2- for exhaust pipe/exhaust manifold which is accessible from top.
NOTE:
Illustration is shown with engine removed.
- Remove left front wheel.
- For vehicles with auxiliary heater, remove bolts (arrows) for exhaust pipe of auxiliary heater on sound insulation.
- Remove bolts or release quick-release screws -1- and -2- and remove front sound insulation.
- Release quick-release screws -3- and remove rear sound insulation, if present.
- Remove bolts -1- through -4- and remove crossmember.
NOTE:
Flex joint in front exhaust pipe must not be bent more than 10°, otherwise it may be damaged.
- Disconnect exhaust system at left double clamp (left arrow).
- Remove heat shield -1- for left drive axle.
- Remove bracket for front exhaust pipe (arrow).
- Expose oxygen sensor wires.
- Remove nuts -1- and -3- for front exhaust pipe/exhaust manifold which are accessible from bottom.
NOTE:
Illustration is shown with engine removed.
- Remove front exhaust pipe with catalytic converter.