Auxiliary belt replacement: Audi Vehicles with 1.9 l TDI

🧭 Before you start

Fits: Audi A6 C5 (4B)

• Special tools named: torque wrench

Don't miss

• The illustration shows a vehicle as of Model Year 2002.

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

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

1. With ignition switched off, disconnect earth wire at battery .
2. On vehicles with auxiliary heater, screw out bolts (arrows) for attaching exhaust pipe of auxiliary/supplementary heater to noise insulation.
3. Release fasteners (1 ... 5) and detach front and rear noise insulation. [Note: The illustration shows a vehicle as of Model Year 2002.] [Note: Prior to removal, mark direction of poly V-belt with chalk or a felt-tip pen. Running a used poly V-belt in the opposite direction could destroy it.]
4. Slacken off bolts of tensioning roller of air conditioner compressor poly V-belt (arrows), slacken off poly V-belt and detach.
5. ⚠ The air conditioner refrigerant circuit is not to be opened. — Screw out bolts (A) at air conditioner compressor.

6. Use a piece of wire to suspend air conditioner compressor from body.
7. Slacken off bolt (1) of noise insulation over drive shaft at front right.
8. Disengage hook (2) and detach noise insulation.
9. Remove holder for turbocharger (arrows).
10. Detach wires (1) and (2) at starter and insulator at positive connection of starter.
11. Unscrew clamp (3).
12. Unscrew starter at gearbox and detach.
13. Check whether bushings (C) have been fitted at compressor.
14. Secure bolts (A) with washer (B) at air conditioner compressor.
15. Fit poly V-belt for air conditioner compressor.
16. Apply torque wrench as shown in "“7 o'clock position”" to hexagon head of tensioning roller and pre-tension to 30 Nm. — 30 Nm (22 lb-ft)
17. At the same time, tighten bolts (A) to 23 Nm. — 23 Nm (17 lb-ft)
18. Connect battery. Action to be taken .
19. Start engine and check belt routing.

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
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• Checking solenoid valves for camshaft adjustment – Audi ASN
• Checking injection quantity – Audi A8 D3
• Removing and installing additional ATF cooler – Audi A8 D3
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