Removing and installing engine control unit J623 with protective housing, Tiguan — VW

🧭 Before you start

Fits: VW Tiguan I (5N, 2007–2016)

• Special tools named: locking bar
• Renewed: locking bar

🔧 Engine codes this applies to

📋 Procedure

1. Switch off ignition.
2. Remove windscreen wiper arms Electrical system92Windscreen wiper system; Removing and installing windscreen wiper arms
3. Remove plenum chamber cover General body repairs, exterior50Bulkhead; Removing and installing plenum chamber cover.
4. Unscrew bolts (1).
5. Cover plenum chamber with clean cloth to prevent it from being scratched.

6. Raise engine control unit plus retaining frame slightly.
7. Release engine control unit in (direction of arrow) and pull slightly out.
8. Bend upwardly projecting ends (1) of locking bar outwards.
9. Unscrew shear-head bolts (2) using a pair of pliers and remove locking bar.
10. Slide connector locking devices (1) on engine control unit outwards and pull off both connectors.
11. Remove engine control unit.
12. Slide engine control unit (1) in (direction of arrow) into retaining frame until it engages.
13. Bolt retaining frame in place.
14. Attach connectors to engine control unit and slide catches (1) inwards until they engage.
15. Fit new locking bar and tighten new shear-head bolts until heads shear off.

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