Removing and installing anti-theft engine control unit J623, Scirocco — VW
Removing and installing anti-theft engine control unit J623, Scirocco on VW: 14 steps, engines CBAA, CBAB, CBAC, CBBA.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: platform code 137
🔧 Engine codes this applies to
📋 Procedure
- Switch off ignition.
- Remove wiper arms Electrical system92Windscreen wiper system; Removing and installing wiper arms.
- Remove plenum chamber cover General body repairs, exterior50Plenum chamber bulkhead; Removing and installing plenum chamber cover.
- Remove plenum chamber bulkhead General body repairs, exterior50Plenum chamber bulkhead; Assembly overview – plenum chamber bulkhead.
- Press retaining frame down in (direction of arrow) and remove engine control unit.
- Remove shear-head bolts (arrows) using pliers and remove locking clips.
- Push connector locking devices in direction of (arrow), and pull connectors off.
- Fit connectors to engine control unit and slide locking devices onto stop in direction of (arrow).
- Fit the two locking clips over the connector and secure with new shear-head bolts (arrows).
- Tighten shear-head bolts evenly until heads shear-head off (arrows).
- Insert engine control unit into retaining frame and press retaining frame upwards in (direction of arrow)
- Install wiper arms Electrical system92Windscreen wiper system; Removing and installing wiper arms.
- Install plenum chamber cover General body repairs, exterior50Plenum chamber bulkhead; Removing and installing plenum chamber cover.
- Install plenum chamber bulkhead General body repairs, exterior50Plenum chamber bulkhead; Assembly overview – plenum chamber bulkhead.
Other VW procedures
- Removing and installing toothed belt · 31 torque figures
- Removing and installing high-pressure pump – VW Passat B8 · 16 torque figures
- Removing and installing ancillary bracket – VW Jetta VI · 10 torque figures
- Removing and installing sealing flange on pulley end – VW · 6 torque figures
- Removing and installing 4/2-way valve with thermostat · 5 torque figures
- Removing engine · 41 torque figures
- Removing and installing camshaft – VW Golf Cabriolet · 47 torque figures
- Adjusting valve timing – VW Passat B5 · 83 torque figures
- Removing and installing camshafts – VW Passat B6 · 39 torque figures
- Removing and installing coolant pump · 53 torque figures
Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.