Removing and installing protective housing for control units in plenum chamber — VW

🧭 Before you start

Fits: VW Passat B5 (3B)

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• Gasket (C) must always be replaced. The gasket must not intrude into the body opening and the panel opening.

🔩 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. Disconnect battery
2. Remove securing bolts (arrows) and pull off sealing cover.
3. Remove engine control unit 23, remove additional relay carrier with additional fuse holder if necessary .
4. Separate connectors on connector station.
5. Pull engine wiring harness together with rubber grommet out from protective housing recess.
6. Remove both securing nuts (A) (4 Nm). — 4 Nm (3.0 lb-ft)
7. Lever control unit protection housing off rear studs and then pull off securing point (B).
8. Push sealing cover by hand and tighten securing bolts using cross-over sequence. [Note: Gasket (C) must always be replaced. The gasket must not intrude into the body opening and the panel opening.]

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