TorqFix

Removing and installing socket illumination bulb L42, 12 V socket 4U20 — AUDI

Removing and installing socket illumination bulb L42, 12 V socket 4U20 on Audi: 13 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.

13 steps

🧭 Before you start

Fits: Audi A6/A7 C7 (4G, 2011–2018); platform code 4X

  • Special tools named: T40148, puller

Don't miss

  • Release tabs (2) on puller T40148 must engage in recesses in 12 V socket (3)(arrow); for this purpose, push threaded rod (1) downwards as far as stop.

📋 Procedure

  1. Remove mounting for cigarette lighter and electric socket General body repairs, interior68Centre console; Exploded view - centre console.
  2. Release tabs (2) on puller T40148 must engage in recesses in 12 V socket (3)(arrow); for this purpose, push threaded rod (1) downwards as far as stop.
  3. Open mounting (3) for cigarette lighter/12 V socket.
  4. Open cover (4) of 12 V socket and hold in this position.
  5. Insert puller T40148 into 12 V socket (1) as far as stop.
AUDI? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Turn knurled wheel (2) on puller T40148 clockwise as far as stop.
  2. Use puller T40148 to pull 12 V socket out of illuminated ring with bulb.
  3. Release retaining clips (arrows).
  4. Take 12 V socket with illuminated ring (1) out of mounting (2).
  5. Guide out electrical wire through mounting.
  6. Detach support (1) from puller T40148.
  7. Push piston downwards and hold in this position.
  8. Turn knurled wheel (4) on puller T40148 anti-clockwise (arrow); this will open release tabs (2) on 12 V socket (3) and puller T40148 can be removed.

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.