Removing and installing theft-protected engine control units — VW

🧭 Before you start

Fits: VW Touareg I (7L, 2002–2010)

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• The shear-head bolt threads are coated with locking compound. Heating the shear-head bolt with a hot air blower releases the locking effect of the locking compound.

🔧 Engine codes this applies to

📋 Procedure

1. Switch off ignition.
2. Remove windscreen wiper arms Electrical system92Removing and installing windscreen wiper system.
3. Remove plenum chamber cover General body repairs, exterior64Removing and installing plenum chamber cover. [Note: The shear-head bolt threads are coated with locking compound. Heating the shear-head bolt with a hot air blower releases the locking effect of the locking compound.]
4. ⚠ Cover lines, connections and control units in the vicinity of the engine control unit to prevent damage through heat (scorching/melting of plastics etc.). — Turn temperature settings potentiometer (2) to a maximum heat output of 600 °C.
5. Set two-stage switch for volume of air (3) to position 3.

6. ⚠ When shear-head bolts are heated up, parts of the protective housing will be subjected to a large amount of heat. Wear protective gloves to avoid possible injury. — Place nozzle of hot air blower close to shear-head bolt (arrows).
7. Switch on hot air blower and heat bolt heads for approximately 20 to 25 seconds.
8. Unscrew shear-head bolt (arrows), using pliers on bolt head.
9. Remove cover (1) from control unit.
10. Slide connector locking devices (1) on engine control unit outwards and pull off both connectors.
11. Remove engine control unit from retaining frame of plenum chamber.
12. The procedure for the second control unit is exactly the same.
13. Insert engine control unit in retaining frame.
14. Fit connector to engine control unit and slide locking devices (1) inwards.
15. Place cover (1) over engine control unit and fit shear-head bolts (arrows) by hand.
16. Then tighten new shear-head bolts evenly until head shears off.
17. Install plenum chamber cover General body repairs, exterior64Removing and installing plenum chamber cover.
18. Install wiper arms Electrical system92Windscreen wiper system; Removing and installing wiper arms.

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