Removing and installing brake booster MK25E/MK25E1 — AUDI

🧭 Before you start

Fits: VW Transporter T5 (7H), VW Transporter T6 (7E)

• Opens: brake fluid

📋 Procedure

1. If vehicle has a coded radio, note radio code or, if necessary, request it.
2. Disconnect battery Electrical system27Battery; Disconnecting and reconnecting battery.
3. Pull trim (arrow) out upwards.
4. Disconnect lines (1) from expansion tank (4).
5. Separate connectors (2) and remove bolts (3).

6. Move expansion tank (4) aside and secure against movement.
7. Remove bolt (arrow) and remove cover (1) to left of battery.
8. Remove battery Electrical system27Battery; Removing and installing battery.
9. Unscrew bolt (arrow A) and nut (arrow B).
10. Pull trim (1) off plenum chamber bulkhead.
11. Remove connecting pipe together with connecting hoses between charge air cooler and intake manifold flap motor V15721.
12. Remove nut (arrow) below battery box for securing fuel filter (1).
13. Pull fuel lines off fuel filter and move aside.
14. Unscrew bolts (arrows) and remove fuel filter (1).
15. Separate fuel lines under brake master cylinder.
16. Remove battery tray.
17. Unhook supply hose for clutch master cylinder (1) from bracket (2).
18. Raise bracket (2) slightly at rear tab and pull off brake booster in (direction of arrow).
19. Disconnect vacuum hose from brake booster.
20. On vehicles with brake assist system, pull connector (1) off brake booster.
21. Remove brake master cylinder .
22. Remove bracket together with ABS hydraulic unit N55 from body.
23. Separate brake pedal from brake booster .
24. Remove nuts from brake booster (arrows).
25. Carefully remove brake booster from vehicle.
26. Install brake master cylinder .
27. Clip brake pedal to brake booster .
28. Install and adjusting brake light switch .
29. Bleed brake system .
30. Code radio.

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