Removing and installing clutch master cylinder: Audi A4 Cabriolet B6/B7 / A4 B6/B7

🧭 Before you start

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

• Opens: brake fluid, clutch fluid

Don't miss

• The brake fluid reservoir does not have to be removed.
• To simplify the illustration, the brake fluid reservoir has not been included.Brake fluid reservoir must be moved slightly to the side in order to unscrew upper Torx bolt.
• Lock clutch pedal in position by pressing in (direction of arrow). Make sure retaining clip (1) engages correctly in clutch pedal.
• Screw in securing bolt (1) for brake fluid reservoir and attach connector at brake fluid level warning contact.

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📋 Procedure

1. ⚠ Follow steps required when disconnecting battery 27.On vehicles with telematics: activate service mode of telematics control unit before disconnecting battery 91. — Pull off rubber seal on plenum chamber in (direction of arrow).
2. Detach cover (1) from plenum chamber.
3. With the ignition switched off, disconnect battery earth strap 27.
4. Use screwdriver to pry off the two caps (3).
5. Unscrew nuts (4) and detach the two wiper arms (2).

6. Pull off clips (1) and detach cowl panel grille (5).
7. Unscrew bolts (arrows) and take off the cover.
8. Use screwdriver to carefully pry off retaining strap (arrow).
9. Release catches (arrows) and unplug connectors (1) and (2) at engine control unit.
10. Unplug connectors (2) at connector console.
11. Unscrew electrical wiring connection (1).
12. Release catches (arrows) and lift auxiliary relay carrier out of electronics box.
13. Pull engine wiring harness together with rubber grommet out through opening in electronics box.
14. Remove nuts (arrows) and lift out electronics box (1). [Note: In the following steps make sure that no brake fluid escapes into the plenum chamber or onto the gearbox below. If this does happen, clean the affected area thoroughly.When performing work in the footwell, put cloths on the carpet to protect it from possible brake fluid spills.]
15. Clamp off supply hose (A) from brake fluid reservoir using hose clamp3094. Disconnect hose from master cylinder and plug hose.
16. Remove rubber grommet from bulkhead above connection pipe for supply hose.
17. Lever out retaining clip (C) using a screwdriver and pull out pipe/hose assembly (B) slightly.
18. Unscrew bolt for brake fluid reservoir (1) and unplug connector for brake fluid level warning contact downwards. [Note: The brake fluid reservoir does not have to be removed.]
19. Remove vacuum pipe leading to brake servo (1).
20. Unscrew the two Torx bolts (arrows). [Note: To simplify the illustration, the brake fluid reservoir has not been included.Brake fluid reservoir must be moved slightly to the side in order to unscrew upper Torx bolt.]
21. Remove storage compartment on driver's side 68.
22. Remove over-centre spring .
23. Detach brake pedal from brake servo 47.
24. Detach steering column from steering rack (arrow A)48.
25. Unplug connectors from clutch pedal switch F36(1), brake pedal switch (2) and accelerator pedal module (3).
26. If fitted, detach electrical connector on clutch pedal switch for engine start F194.
27. Unscrew securing bolt for mounting bracket (arrow B) and remove entire pedal cluster. [Note: When releasing the operating rod, make sure that clutch pedal does not collide with mounting bracket for clutch pedal switch (arrow). The mounting bracket could otherwise break off.To ensure a secure fit in the pedal cluster, the clutch pedal switchF 36 and clutch pedal switch for engine start F194 may only be installed once.]
28. Position spark plug connector pliersV.A.G 1922 in clutch pedal recesses, press on sides of retaining clip and detach clutch pedal from master cylinder.
29. Detach retaining clip (1) and remove clutch pedal (2).
30. Unscrew bolts (3) and remove master cylinder (4).
31. Insert master cylinder (4) and tighten bolts (3) to torque .
32. Insert retaining clip (1) in clutch pedal.
33. Lock clutch pedal in position by pressing in (direction of arrow). Make sure retaining clip (1) engages correctly in clutch pedal.
34. Insert entire pedal cluster and tighten bolt (1) by hand. The second mechanic should guide pipe/hose assembly into master cylinder from plenum chamber.
35. Tighten bolts for brake servo (arrows) to torque .
36. Press in retaining clip (C) as far as it will go in direction of (arrow).
37. Insert pipe/hose assembly (B) in master cylinder, making sure you hear it engage.
38. Fit rubber grommet (D) onto connecting pipe for supply hose (A) at bulkhead.
39. Push supply hose (A) from brake fluid reservoir on as far as it will go.
40. Remove hose clamp3094.
41. Screw in securing bolt (1) for brake fluid reservoir and attach connector at brake fluid level warning contact.
42. Tighten hexagon socket head bolt (arrow B) for securing pedal cluster to dash panel carrier to torque .
43. Attach electrical connectors (1), (2) and (3).
44. If fitted, connect electrical connector on clutch pedal switch for engine start F194.
45. Connect brake pedal to brake servo 47.
46. Secure steering column to steering rack (arrow A)48.
47. Install over-centre spring .
48. Install storage compartment on driver's side 68.
49. Bleed clutch system .
50. Insert electronics box and tighten nuts (arrows) to 4 Nm. — 4 Nm (3.0 lb-ft)
51. Route engine wiring harness and plug in connector in connector console.
52. Install engine control unit 23 or 24.
53. If applicable, install auxiliary relay carrier and auxiliary fuse carrier 97.
54. Press on cover (hand-tight) and tighten bolts in diagonal sequence to 4 Nm. — 4 Nm (3.0 lb-ft)
55. Follow the steps required after connecting the battery 27.

Other AUDI procedures

• Removing and installing toothed belt – Audi · 56 torque figures
• Removing engine – Audi A8 D3 · 41 torque figures
• Removing camshaft timing chain from camshafts – Audi A6/A7 C7 · 38 torque figures
• Installing engine – Audi A8 D4 · 36 torque figures
• Removing and installing camshaft timing chain · 29 torque figures
• Removing and installing stone deflector 8E0 501 561 (old version) for track rod (three-piece version) · 1 torque figures
• 5-speed manual gearbox 012, 01W, 0A9, front-wheel drive — Removing and installing drive wheel for speedometer sender
• Pressing rear wheel bearing out and in with wheel bearing housing fitted
• Assignment of ground clearances (setting dimensions) for adaptive suspension
• Removing and installing amplifier with bass loudspeaker (on right in luggage compartment)R43 (Saloon) · 1 torque figures