A8L Quattro Sedan V8-4.2L (AUX) (2001)
Wheel Speed Sensor: Testing and Inspection
Front Axle
Front Axle Components, Removing and Installing
Overview
1. Drive axle with ABS wheel speed sensor rotor
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Check rotor for dirt and damage
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If rotor is damaged, drive axle must be removed and outer CV joint must be replaced
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Outer CV joint is supplied with rotor as replacement part
2. Bolt with washer
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10 Nm (7 ft. lbs.)
3. Bracket
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Install wheel speed sensor wire grommet in bracket
4. Flanged bolt
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Always replace
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Tighten to 200 Nm (148 ft. lbs.) plus additional 1/4-turn (90°)
WARNING: Loosen and tighten the flanged bolt only with the vehicle standing on its wheels. Otherwise, there is risk of accident
5. Clamping sleeve
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Always replace
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Identical part on right and left
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Grease all around sleeve with brake cylinder paste before installing in swing arm
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Press into swing arm to stop
6. Seal
7. ABS wheel speed sensor, -G45- or -G47-
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Identical part on right and left
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Removing
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Before installing, install seal and grease all around with brake cylinder paste. Then press in to stop by hand.
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Harness connector for speed sensor
ABS Wheel Speed Sensor Rotor, Checking and Cleaning
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Remove wheel.
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Pull ABS wheel speed sensor out of swing arm.