Removing and installing pyrotechnical battery isolator: VW Passat B6

🧭 Before you start

Fits: VW Passat B6 (3C, 2005–2010)

Don't miss

• Observe safety measures when working on the pyrotechnical battery isolator .

🔩 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. ⚠ Observe safety measures when working on the battery isolator .Observe notes for disposal of battery isolation units . — Switch off ignition and all electrical consumers and disengage ignition key or start button by moving to position 0 (pre-detent).
2. Open locking devices (arrows) and remove flap.
3. Release locking lug (arrow) and remove storage compartment.
4. Release locking devices (1), remove trim (2) and storage compartment (3).
5. Disconnect battery .

6. Open fasteners of main fuse box (1) by turning them 90° to left and open cover downwards.
7. Remove flange nut (1) and remove B+ wire (2) from connector thread.
8. Unscrew self-locking nut (4) and remove pyrotechnical battery isolator (3) from connector thread, taking connected wiring length into consideration.
9. Release connector (1) and pull lock button (3) in direction of arrow.
10. Pull connector (1) off in direction of arrow and remove pyrotechnical battery isolator (2) from vehicle. [Note: Observe safety measures when working on the pyrotechnical battery isolator .] [Note: Ensure, when fitting the connector on the pyrotechnic battery isolator, that the connector fastener engages audibly.]
11. Tighten all threaded connections to specified torque .
12. Reconnect battery .

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