Removing and installing control unit for navigation system with CD drive J401 - Roadster — AUDI

🧭 Before you start

Fits: Audi TT Mk1 (8N)

🔩 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. Switch off all electrical consumers.
2. Remove ignition key.
3. Open storage compartment on right behind passenger's seat.
4. Remove right storage box (with navigation system): General Body Assembly, Interior70.
5. Slacken off bolts (5) (2 Nm) at mounting frame. — 2 Nm (1.5 lb-ft)

6. Take out mounting frame (4).
7. Unplug connector and disconnect aerial wire (GPS) on back of control unit.
8. Slacken off bolts (6) (1.5 Nm) on left and right of control unit (7) and take control unit out of mounting frame (4). — 1.5 Nm (1.1 lb-ft)
9. Installation is performed in reverse sequence.

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