Removing and installing amplifier R12 (Saloon): Audi A4 B6/B7
Step-by-step removing and installing amplifier R12 (Saloon) for the Audi A4 B6/B7: 6 steps, 1 torque figure.
Removing and refitting amplifier R12 in the A4 B6/B7 (8E) saloon. The amplifier sits behind the right-hand luggage compartment side trim. Before starting, switch off every electrical consumer and take the ignition key out, so nothing is live at the connector. Remove the side trim, unplug the electrical connector at the amplifier, then undo its bolts and lift the unit out. Refitting is the reverse, with the bolts tightened to 4 Nm. There is not much to it; the points that matter are working with everything switched off, refitting the trim without breaking its clips, and making sure the connector is fully home so the audio system works when you are done.
🧭 Before you start
Switch off all consumers and remove the key, take off the right-hand luggage compartment side trim, unplug the amplifier and unbolt it. Refit in reverse, tightening the bolts to 4 Nm, reconnect and check the audio system works.
Fits: Audi A4 B6/B7 (8E)
Don't miss
- Switch off all electrical equipment and remove the key before unplugging the amplifier.
- Tighten the amplifier bolts to 4 Nm.
- Push the connector fully home and check the audio system before refitting the trim.
- Take care with the side trim clips; replace any that break, as general practice.
Written for this job from the workshop steps below · TorqFix editorial.
🔩 Torque settings
Values can differ between engine variants — check the code stamped on your block.
| Torque | Fastener / step |
|---|---|
| 4 Nm (3.0 lb-ft) | Unscrew bolts |
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 equipment.
- Remove ignition key.
- Remove luggage compartment side trim (right-side): General body repairs, interior70Trim panels.
- Unplug electrical connector (2) at amplifier R12(1).
- Unscrew bolts (4 Nm) and remove amplifier R12(1). — 4 Nm (3.0 lb-ft)
- Installation is performed in reverse sequence.
Other AUDI procedures
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- 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
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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.