Removing and installing front exhaust pipe (right-side) with starter catalytic converter and main catalytic converter - vehicles with manual gearbox or multitronic gearbox 01J — AUDI

🧭 Before you start

Fits: Audi A4 Cabriolet B6/B7 (8H), Audi A4 B6/B7 (8E)

• Renewed: gaskets

Don't miss

• Shown from rear with engine removed for illustration purposes.
• Shown in illustration with engine removed.
• To avoid any damage, the flexible joint in the front exhaust pipe must not be bent more than 10°.
• Components of exhaust system mountings on gearbox: vehicles with manual gearbox and front-wheel drive , vehicles with manual gearbox and four-wheel drive , vehicles with multitronic gearbox 01J .

🔧 Engine codes this applies to

📋 Procedure

1. Pull off engine cover panel (rear) (arrows).
2. Remove cover (1) at right of engine compartment.
3. Remove bolts (arrows).
4. Disengage activated charcoal filter solenoid valve 1N80(item 1) at air duct.
5. Remove air duct (2).

6. Remove air cleaner housing (arrows).
7. Unbolt retaining plate (3) for solenoid valves (arrows).
8. Detach electrical connector at air mass meter G70.
9. Disconnect crankcase breather hose (4) at air duct (2).
10. Unscrew bolt (arrow) and pull air duct (2) off throttle valve module J338.
11. If fitted, disconnect hose (1) from air duct. [Note: Shown from rear with engine removed for illustration purposes.]
12. Remove electrical connectors (1 ... 4) from bracket (on right side of bulkhead).
13. Unplug electrical connectors (1) and (4).
14. Guide wiring for Lambda probes downwards.
15. Unscrew nut (2) (accessible from above) securing front exhaust pipe to exhaust manifold. [Note: Shown in illustration with engine removed.]
16. Remove front right wheel.
17. Vehicles with auxiliary heater: remove bolts (arrows) securing exhaust pipe for auxiliary/additional heater to noise insulation.
18. Release bolts or quick-release fasteners (1) and (2) and take off front noise insulation.
19. If fitted, open quick-release fasteners (3) and remove rear noise insulation.
20. Unbolt heat shield for drive shaft (right-side) (arrows). [Note: To avoid any damage, the flexible joint in the front exhaust pipe must not be bent more than 10°.]
21. Disconnect exhaust system at clamp (right-side) (right arrow).
22. Unbolt mounting plate for front exhaust pipe (arrow).
23. Remove nuts (1) and (3) (accessible from below) securing front exhaust pipe to exhaust manifold. [Note: Shown in illustration with engine removed.]
24. Move Lambda probe wires clear.
25. Take out front exhaust pipe with starter and main catalytic converter. [Note: Renew gaskets and self-locking nuts.Fit all cable ties in the original positions when installing.When installing, the Lambda probe wires must always be reattached at the same locations to prevent them from coming into contact with the exhaust pipe.]
26. Align exhaust system so it is free of stress: vehicles with front-wheel drive , vehicles with four-wheel drive . [Note: Components of exhaust system mountings on gearbox: vehicles with manual gearbox and front-wheel drive , vehicles with manual gearbox and four-wheel drive , vehicles with multitronic gearbox 01J .]

Other AUDI procedures

• Checking fuel pump control unit J538 - vehicles with 4-cylinder TFSI engine
• Removing and installing fuel delivery unit from approx. 11.98
• Testing fuel gauge senders
• Checking fuel pump G23 (right-side) - electrical test
• Tightening torques
• Removing and installing toothed belt · 56 torque figures
• Removing engine · 41 torque figures
• Removing camshaft timing chain from camshafts · 38 torque figures
• Installing engine · 36 torque figures
• Removing and installing camshaft timing chain · 29 torque figures