Removing and installing aerial reader unit for keyless entry system J723 — AUDI
Removing and installing aerial reader unit for keyless entry system J723 on Audi: 23 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 Q7 (4L, 2005–2015)
📋 Procedure
- Remove luggage compartment side trim (left and right) 70.
- Lift out luggage compartment floor (1)(arrows).
- Remove right luggage compartment side trim 70.
- Lift out mounting bracket (1) for luggage compartment floor (arrows).
- Release retaining clips (arrows) and swivel trailer detector control unit J345(item 1) out of frame.
- Unplug electrical connectors (2) and (3).
- Remove the navigation system with CD drive control unit J40191.
- Remove control unit for air suspension 48.
- Unscrew bolt (4) and nuts (2) and (6).
- Use socket with extension (5) to unscrew nut (1) at rear of mounting (3) for control units.
- Detach mounting for control units.
- Detach relays or control units and then unclip relevant socket.
- Release retaining clips (arrows) and press fuse holders (1, 2, 4) out of relay and fuse carrier towards rear.
- Unscrew nuts (3) and (5) and remove relay and fuse holder.
- Unscrew nut (6).
- Unscrew nut (4) and move frame (5) slightly to the side
- If fitted, unscrew bolts (1) and (2) and detach aerial amplifier for mobile telephone R86(item 3).
- Remove frame with control units and move clear to side with wiring connected.
- Release retaining clips (arrows) and remove aerial reader unit for keyless entry system J723(item 1) from mounting frame.
- Unplug electrical connector (2).
- Install frame for control units 91.
- Install relay and fuse carrier in luggage compartment .
- Install luggage compartment side trim 70.
Other AUDI procedures
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- 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 mounting base for windbreak
- Removing and installing hydraulic cylinder for convertible roof fin
- Removing and installing bumper cover - TT RS
- Removing and installing parking brake switch – Audi TT Mk2 · 1 torque figures
- Removing and installing starter - Audi TT with 2.0 ltr. TDI engine and manual gearbox
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.