Removing and installing operating electronics control unit, navigation J402 — AUDI
Removing and installing operating electronics control unit, navigation J402 on Audi: 11 steps. What to remove, in what order, and what to check after.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: Audi A2 (8Z)
Don't miss
- Insert radio release keys T10057 in release slots as shown (arrows) until they engage. Pointed ends of grips must face outwards.
📋 Procedure
- Switch off all electrical equipment.
- Remove ignition key.
- Insert radio release keys T10057 in release slots as shown (arrows) until they engage. Pointed ends of grips must face outwards.
- Grasp hold of grips on radio release keys T10057 and pull operating electronics control unit, navigation out of dash panel.
- Release and unplug connectors.
- Press tab (arrow) and pull out release keys to front.
- Plug in all connectors.
- Hold control unit straight and slide it into dash panel until it engages in mounting frame.
- Control unit encoding and adaption Radio, telephone and navigation system, self-diagnosis01.
- Activate anti-theft encoding.
- Check operation.
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
- Removing and installing alternator - vehicles with 1.6 ltr. and 2.0 ltr. TDI engine
- Renewing adapter frame for adaptive cruise control unit J428 - version 2
- Removing and installing washer fluid reservoir - Audi A3 without side auxiliary radiator
- Removing and installing headlight range control motor V48/V49 - gas discharge headlights
- Removing and installing headlight range control motor V48/V49 - LED headlights
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.