Removing and installing mobile telephone operating electronics control unit J412 - Roadster (up to MY 03) — AUDI
Removing and installing mobile telephone operating electronics control unit J412 - Roadster (up to MY 03) on Audi: 6 steps, 1 torque figure.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: Audi TT Mk1 (8N)
🔩 Torque settings
Values can differ between engine variants — check the code stamped on your block.
| Torque | Fastener / step |
|---|---|
| 2 Nm (1.5 lb-ft) | Slacken off bolts (2 |
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
- Switch off all electrical consumers.
- Remove ignition key.
- Remove subwoofer .
- Unplug connector at control unit (1).
- Slacken off bolts (2) (2 Nm) and detach control unit (1) from back panel. — 2 Nm (1.5 lb-ft)
- Installation is performed in reverse sequence.
Other AUDI procedures
- Removing and installing toothed belt – Audi · 56 torque figures
- Removing engine – Audi A8 D3 · 41 torque figures
- Removing camshaft timing chain from camshafts – Audi A6/A7 C7 · 38 torque figures
- Installing engine – Audi A8 D4 · 36 torque figures
- Removing and installing camshaft timing chain · 29 torque figures
- Checking delivery pressure of fuel system pressurisation pump G6 - vehicles without supplementary fuel pump V393
- Removing and installing diesel particulate filter (engine codes BJJ, BJK, BJL, BJM)
- Renewing propshaft flange seal – Audi ABCD
- Checking ATF level - vehicles with auxiliary ATF cooler – Audi · 1 torque figures
- Adjusting locking cable – Audi TT Mk1 · 2 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.