Removing control unit and hydraulic unit: VW Golf V / Jetta

🧭 Before you start

Fits: VW Golf V / Jetta (1K, 2003–2009)

Don't miss

• Do not bend the brake lines in the area of the hydraulic unit! — Read out and note the existing control unit code.
• The illustration shows the bolt of the clamp (1) from below. This can also be installed from above in individual cases.
• When lowering, be careful with the cables, the exhaust gas temperature sender 4G648 and the Lambda probe G39 so as to avoid damage.
• Do not remove brake pedal depressorV.A.G 1869/2.

📋 Procedure

1. ⚠ Do not bend the brake lines in the area of the hydraulic unit! — Read out and note the existing control unit code.
2. Disconnect battery Electrical system27.
3. Remove engine cover panel.
4. Remove pressure pipe and intake connecting pipe with regulating flap control unit 4-cylinder injection engine (1.4 l direct injection engine, turbocharger and compressor)24Injection system; Part I - assembly overview - intake manifold.
5. Remove charge air hose 4-cylinder injection engine (1.4 l direct injection engine, turbocharger and compressor)21Charge air system.

6. Clamp off hose from coolant expansion tank and pull it off.
7. Remove connecting hose to intake pipe 4-cylinder diesel engine (2 valve)21Removing and installing charge air system with turbocharger.
8. Remove intake manifold flap motor V157 4-cylinder diesel engine (2 valve)23Removing and installing mixture preparation - injection.
9. Remove connecting pipe between intake hose and turbocharger.
10. Remove toothed belt guard upper part.
11. Separate connector for exhaust gas temperature sender 4G648(2) and Lambda probe G39(3).
12. Unclip cable for exhaust gas temperature sender 4G648 and Lambda probe G39 from all brackets on plenum chamber and engine
13. Pull off connector (1) on exhaust gas pressure sensor 1G450.
14. Unscrew bolt (2) and remove bracket (3) with exhaust gas pressure sensor 1G450 in (direction of arrow).
15. Place bracket (3) with exhaust gas pressure sensor 1G450 to the front.
16. Remove engine cover 10.
17. Unscrew bolt (1) for particulate filter bracket.
18. Raise vehicle.
19. Loosen clamp (1) for turbocharger/particulate filter connection and remove. [Note: The illustration shows the bolt of the clamp (1) from below. This can also be installed from above in individual cases.]
20. Detach exhaust system bracket from subframe (arrows).
21. Unscrew bolt (1) and remove drive shaft cover (2).
22. Unscrew right drive shaft from flange, place downwards and secure.
23. Loosen double clamp on exhaust pipe and slide to rear.
24. Remove nuts (1) and lower particulate filter.
25. Remove nuts (2) and take out bracket for particulate filter (3).
26. Lower particulate filter until it lies on the steering gear. [Note: When lowering, be careful with the cables, the exhaust gas temperature sender 4G648 and the Lambda probe G39 so as to avoid damage.]
27. Lower vehicle.
28. Unscrew nut (1) and remove heat shield (2) if fitted.
29. Release connector from control unit (in direction of arrow) and pull off.
30. Apply brake pedal depressorV.A.G 1869/2.
31. Connect bleeder bottle hose to front left brake caliper bleeder valve and rear left brake caliper bleeder valve and open bleeder valves.
32. Depress brake pedal at least 60 mm using brake pedal depressorV.A.G 1869/2.
33. Close front left and rear left bleeder valve.
34. Do not remove brake pedal depressorV.A.G 1869/2.
35. Place sufficient lint-free cloths under the control unit and hydraulic unit.
36. First identify the two brake master cylinder brake lines (A and B) and unscrew from the hydraulic unit.
37. Immediately seal brake lines and threaded holes with sealing plugs1H0 698 311 A.
38. Identify brake lines (brake calipers) (1) to (4) and unscrew.
39. Immediately seal brake lines and threaded holes with sealing plugs1H0 698 311 A.
40. Turn hexagon fitting bolt out of retainer (arrow).
41. Pull hydraulic unit with control unit and bracket sideways out of rubber dampers in the console in (direction of arrow) and turn upside down.
42. Unbolt retainer from hydraulic unit in engine compartment and remove.
43. Remove hydraulic unit together with control unit.

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