Removing and installing control unit and hydraulic unit, LHD vehicles, four-wheel drive, »R« — VW

🧭 Before you start

Fits: VW Golf VII Variant (BA), VW Golf VII (5G, 2012–2020)

• Opens: brake fluid

Don't miss

• Do not remove brake pedal depressorV.A.G 1869/2.
• Ensure no brake fluid gets onto the contacts of the control unit and the connector.
• Mark, unscrew and seal threaded holes of remaining brake lines (brake calipers).
• Before installing holder of ABS hydraulic unit N55 on bracket, spray rubber dampers with silicone lubricantD 007 000 A2.

📋 Procedure

1. Read out and note the existing control unit code.
2. If vehicle has a coded radio, note radio code or, if necessary, request it.
3. Disconnect battery Electrical system27Battery; Disconnecting and reconnecting battery.
4. Remove heat shield (1) from mounting bracket (2). To do this, release catches in (direction of arrow A), and remove heat shield in (direction of arrow B).
5. Press locking slide downwards in (direction of arrow A).

6. Release connector (1) in (direction of arrow B), and pull it off control unit.
7. Apply brake pedal depressorV.A.G 1869/2.
8. Connect bleed bottle bleed hose (1) to bleed valve of front left brake caliper.
9. Open bleed valve.
10. Connect bleed hose of bleed bottle (1) to bleed valve of rear left brake caliper.
11. Open bleed valve.
12. Depress brake pedal at least 60 mm using brake pedal depressorV.A.G 1869/2.
13. Close front left and rear left bleeder valves.
14. Do not remove brake pedal depressorV.A.G 1869/2.
15. Place sufficient lint-free cloths under the control unit and hydraulic unit. [Note: Ensure no brake fluid gets onto the contacts of the control unit and the connector.]
16. First identify both brake lines from brake master cylinder and unscrew from hydraulic unit.
17. Seal threaded holes immediately using sealing plugs from the assembly part kit with part no. 5Q0 698 311.
18. Mark, unscrew and seal threaded holes of remaining brake lines (brake calipers).
19. Fit dust caps of bleeder valves onto brake lines.
20. Pull ABS hydraulic unit N55 with mounting bracket (1) upwards in (direction of arrow) off retainer.
21. Remove ABS hydraulic unit N55 with mounting bracket (1) upwards from vehicle. [Note: Remove sealing plugs from new hydraulic unit only when the corresponding brake line is to be fitted.If sealing plugs are removed too early from the hydraulic unit, brake fluid can escape, and it can then no longer be guaranteed that the unit can be sufficiently filled and bled.When installing the hydraulic unit, ensure that the rubber dampers are not pressed out of bracket.]
22. Before installing holder of ABS hydraulic unit N55 on bracket, spray rubber dampers with silicone lubricantD 007 000 A2.
23. Using assembly toolV.A.G 1410/8, carefully fit brake lines.
24. Start brake line union screws in sequence (1) through (6).
25. Tighten break line union screws in sequence (1) through (6).
26. Remove brake pedal depressorV.A.G 1869/2.
27. Bleed brake system .
28. Code radio.
29. Code control unit J104 with in "Guided Fault Finding" mode.

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