Removing and installing control unit separately: VW Touareg II

🧭 Before you start

Fits: VW Touareg II (7P, 2010–2018)

• Opens: fuel
• Renewed: bolts

Don't miss

• Unscrew fuel filter (arrows), do not disconnect fuel lines, place fuel filter to side.
• Do not pull off coolant hoses.
• Do not use aggressive cleaning agents (use enclosed cleaning agent).Check sealing surface for damage (visual inspection).
• Basic setting must additionally be performed when ABS control unit J104 is replaced.

🔩 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. Note or request radio code on vehicles with coded radio if necessary.
2. Disconnect battery Electrical system27Disconnecting and reconnecting battery.
3. Remove air intake pipe (not fitted on all engines), release hose clips (arrows) and pull off hose (1).
4. Unscrew fuel filter (arrows), do not disconnect fuel lines, place fuel filter to side.
5. Disconnect connector for air suspension, unscrew securing bolts (arrows) and remove bracket for fuel filter.

6. Remove bolts (arrows) on coolant expansion tank (1).
7. Slide coolant expansion tank (1) in (direction of arrow) out of retainer.
8. Place coolant expansion tank (1) to one side. [Note: Do not pull off coolant hoses.]
9. Thoroughly clean control unit, hydraulic unit and surrounding area.
10. Use a vacuum cleaner to vacuum the control unit, the hydraulic unit and the extended area off to prevent dirt and moisture from entering the system.
11. Release control unit connector (arrow 1) and pull off (arrow 2).
12. Unscrew control unit (2) and pull it off hydraulic unit (3) without canting it.
13. Check valve for damage.
14. Clean sealing surface. [Note: Do not use aggressive cleaning agents (use enclosed cleaning agent).Check sealing surface for damage (visual inspection).] [Note: Use new bolts.A new control unit may be mounted on an existing hydraulic unit max. twice to guarantee impermeability of the elastic seals.A control unit which has already been operated in a vehicle must not be installed a second time.]
15. ⚠ No moisture or particles of dirt may enter control unit.If sealing surface or contact tabs are damaged, hydraulic unit must be renewed.Severe shocks (e.g. dropping, impact) may destroy control unit. Control unit must not then be used. — Carefully push control unit onto hydraulic unit without canting it.
16. Tighten hydraulic unit and control unit diagonally in stages to specified torque with enclosed new Torx bolts.
17. Fit connector.
18. Install coolant expansion tank.
19. If fitted, install fuel filter and suction hose.
20. Code radio.
21. Code ABS control unit J104 with in "“Guided fault finding”".
22. Basic setting must additionally be performed when ABS control unit J104 is replaced.

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