Removing and installing rear wheel speed sensor: Audi A4 Cabriolet B6/B7 / A4 B6/B7

🧭 Before you start

Lift the car, remove the wheel, take out the sensor bolt and pull the sensor from the wheel bearing housing, then release the cable brackets and clips. Lift the rear seat, unplug the connector and press out the grommet to free the lead. Before refitting, check the rotor, grease the sensor seal with lubricating paste and route the wire exactly as it came out. Tighten the sensor bolt to the figure for your variant: 8 Nm, 10 Nm or 18 Nm.

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

• Renewed: outer joint, outer c

Don't miss

• The bolt torque depends on variant: 8 Nm, 10 Nm or 18 Nm. Confirm which one applies before tightening.
• Coat the sensor seal all round with lubricating paste so it slides in without tearing.
• Inspect the rotor for damage or dirt; a damaged rotor comes only with a new outer C.V. joint.
• Route the lead back along its original clips and brackets, clear of the brake hose and suspension.
• Left and right sides share the same connector and grommet arrangement under the rear seat.

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.

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. Loosen wheel bolts.
2. Raise the vehicle.
3. Remove wheel.
4. Switch off ignition.
5. Remove hexagon bolt (1).

6. Pull speed sensor out of wheel bearing housing.
7. Loosen Torx bolt (3) and pull out cable bracket.
8. Remove hexagon bolt (1).
9. Loosen Torx bolt (2) and pull out cable bracket.
10. Unclip speed sensor wiring from retainers.
11. Detach the underbody cover -see arrow-.
12. Lift rear seat out of locking device.
13. Release cable bracket, unplug speed sensor connector (1) and press out grommet (left and right sides are the same).
14. Before installing, lubricate seal for speed sensor all round with lubricating pasteG 000 650.
15. Raise the vehicle.
16. Remove wheel.
17. Unscrew speed sensor from wheel bearing housing.
18. Check that rotor is not damaged or dirty.
19. Raise the vehicle.
20. Remove wheel.
21. Remove brake caliper .
22. Hang up brake caliper on body.
23. Check that rotor is not damaged or dirty.
24. If rotor is damaged, remove drive shaft with rotor and renew outer joint.
25. Removing and installing drive shaft 42
26. Route speed sensor wire back in original position - see removal.
27. Before installing, lubricate seal for speed sensor all round with lubricating pasteG 000 650. [Note: If rotor is damaged or dirty, remove drive shaft. If damaged, renew outer C.V. joint together with rotor.As replacement part, outer C.V. joint is supplied together with rotor 42.]

🎬 Related video tutorial

Independent AUTODOC tutorial for the same job, filmed on a different model (A4 B5 Saloon) — the technique carries over, the fasteners and figures on this page are the ones for your car.

How to change rear ABS sensor on AUDI A4 B5 Saloon

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