Removing and installing four-way lumbar support: Audi A4 B6/B7
Step-by-step removing and installing four-way lumbar support for the Audi A4 B6/B7: 19 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 A4 B6/B7 (8E)
Don't miss
- Ensure that four-way lumbar support is fixed in position with transport lock or a suitable pin at four-way lumbar support frame .
- Rivet four-way lumbar support frame at bottom to backrest frame. When doing so, always place a plastic washer between four-way lumbar support frame and backrest frame .
- Make sure four-way lumbar support is connected to frame for four-way lumbar support with locking element (3) or a suitable pin.
📋 Procedure
- Remove backrest cover panel .
- Use screwdriver to prise out fastening strips (10) (4x).
- Place foil between padding and backrest frame as protection against metal particles.
- Drill out rivet (7).
- Disengage four-way lumbar support frame (4) at top left and right of backrest frame.
- Unplug electrical connectors at four-way lumbar support control motors (5) and (9).
- Unfasten Velcro strip between four-way lumbar support (2) and backrest padding (1).
- Disengage four-way lumbar support at top of frame.
- Take out four-way lumbar support.
- Place plastic foil over Velcro strips of four-way lumbar support. Secure plastic foil in position at four-way lumbar support
- Ensure that four-way lumbar support is fixed in position with transport lock or a suitable pin at four-way lumbar support frame .
- Place four-way lumbar support frame behind backrest frame and engage four-way lumbar support frame at top (left and right) in backrest frame mounting.
- Rivet four-way lumbar support frame at bottom to backrest frame. When doing so, always place a plastic washer between four-way lumbar support frame and backrest frame .
- Pull out plastic foil between backrest padding and four-way lumbar support.
- Fasten Velcro strip of four-way lumbar support to backrest padding by pressing in.
- Plug in electrical connectors at four-way lumbar support motors.
- Place plastic foil (1) over Velcro strips (2) of four-way lumbar support. Secure plastic foil in position at four-way lumbar support.
- Make sure four-way lumbar support is connected to frame for four-way lumbar support with locking element (3) or a suitable pin.
- Before setting rivet (4), insert plastic washer (2) between four-way lumbar support (1) and backrest frame (3).
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 Lambda control
- Checking Lambda probe -G39 and Lambda control
- Checking throttle valve positioner -V60
- Checking output stage for ignition coil
- Testing wiring between white diagnostic connector and engine control unit
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.