Removing and installing engine control unit J623 with no anti-theft device, all vehicles apart from Jetta from MY 2011 — VW
Removing and installing engine control unit J623 with no anti-theft device, all vehicles apart from Jetta from MY 2011 on VW: 13 steps, engines CAYB.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Jetta VI (16, 2010–2018), VW Golf V / Jetta (1K, 2003–2009); platform code AJ5
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- Observe applicable safety measures when road testing vehicle .
📋 Procedure
- Switch off ignition.
- Remove windscreen wiper arms Electrical system92Windscreen wiper system; Removing and installing wiper arms.
- Remove plenum chamber bulkhead General body repairs50Body - front; Plenum chamber bulkhead
- Push down retaining frame in direction of (arrow) and remove engine control unit.
- Push locking devices of connectors in direction of (arrow) and pull off connectors.
- Fit connectors to engine control unit and slide locking devices onto stop in direction of (arrow).
- Place engine control unit into retaining frame and push retaining frame upwards in direction of (arrow).
- Install plenum chamber bulkhead General body repairs50Body - front; Plenum chamber bulkhead.
- Install windscreen wiper arms Electrical system92Windscreen wiper system; Removing and installing wiper arms
- If the engine control unit needs to be renewed, connect vehicle diagnosis tester and perform guided function "“Renewing engine control unit”".
- Interrogate fault memory of engine control unit and erase all fault entries "“Guided function”".
- Perform road test. [Note: Observe applicable safety measures when road testing vehicle .]
- Interrogate fault memory of engine control unit again.
Other VW procedures
- Audi 1.6 TDI CAYB/CAYC gearbox removal & installation · 1 torque figures
- Removing and installing fuel tank - vehicles with four-wheel drive · 1 torque figures
- Removing engine, Touran – VW 1.6 TDI CAYB/CAYC · 1 torque figures
- Measuring radial clearance of camshaft – Audi A6/A7 C7 · 6 torque figures
- Removing and installing fuel tank - vehicles with front-wheel drive · 1 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.