Removing and installing poly V-belts: Audi A4 Cabriolet B6/B7 / A4 B6/B7 (AEB, AJL, ANB, APU, …)

🧭 Before you start

Fits: Audi A4 Cabriolet B6/B7 (8H), Audi A4 B6/B7 (8E)

• Special tools named: torque wrench

Don't miss

• Before removing, mark direction of rotation of poly V-belt with chalk or felt-tip pen. If the belt runs in the opposite direction when it is refitted, this can cause breakage.

🔧 Engine codes this applies to

🔩 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. Vehicles with auxiliary heater: remove bolts (arrows) securing exhaust pipe for auxiliary/additional heater to noise insulation.
2. Release quick-release fasteners (1) and (2) and take off front noise insulation. Leave rear noise insulation in position. [Note: Before removing, mark direction of rotation of poly V-belt with chalk or felt-tip pen. If the belt runs in the opposite direction when it is refitted, this can cause breakage.]
3. Loosen securing bolts of tensioning roller for air conditioner compressor poly V-belt (arrows).
4. Remove poly V-belt.
5. Remove bolts (arrows).

6. Remove air ducts (1) and (2). [Note: Before removing, mark direction of rotation of poly V-belt with chalk or felt-tip pen. If the belt runs in the opposite direction when it is refitted, this can cause breakage.]
7. Turn the tensioner in the direction of the (arrow) to slacken the poly V-belt.
8. Remove poly V-belt from alternator pulley.
9. Position poly V-belt on pulleys for crankshaft, power steering pump, tensioning roller and viscous fan.
10. Turn tensioner in direction of (arrow) to fit poly V-belt.
11. Finally, position poly V-belt on alternator pulley and release tensioner.
12. Fit poly V-belt for air conditioner compressor.
13. Apply torque wrench to hexagon flats on tensioning roller in "“seven o'clock”" position as shown and tension with a torque of 30 Nm in direction of (arrow). — 30 Nm (22 lb-ft)
14. At the same time tighten bolts (A).
15. Check both poly V-belts for proper seating.
16. Start engine and check that belt runs properly.

🎬 Video walkthrough

Independent video tutorial by AUTODOC (YouTube) — a helpful visual companion to the steps above.

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