Audi Workshop Service and Repair Manuals

• Speed sensor
• ◆ Identical part on left and right
• ◆ Removing and installing
  .
• ◆ Release connector of wheel speed sensor cable and detach. Unclip speed sensor wiring
• Clamping sleeve
• ◆ Always replace
• ◆ Identical part on left and right
• ◆ Grease all around with lubricating paste G 000 650 before inserting in wheel bearing housing
• ◆ Press home in wheel bearing housing

• Axle beam/rear axle with splash plate and stub axle
• Rotor
• ◆ Removing and installing
  .
• Wheel hub
• Outer wheel bearing
• Thrust washer
• Hexagon nut
• ◆ Adjusting
• Locking ring
• ◆ Attach to hexagon nut
• Grease cap
• ◆ Replace
• Split pin
• ◆ Always replace

Removing and installing speed sensor on rear axle

• ‒ Switch off ignition.
• ‒ Lift rear seat out of its catches.
• ‒ → Release cable holder -arrow-, separate plug connection of speed sensor cable and press out grommet -arrow- (left and right sides are mirror image).
• ‒ Loosen wheel bolts.
• ‒ Raise vehicle.
• ‒ Remove wheel.

• ‒ → Unclip speed sensor wiring from retainers.
• ‒ Pull speed sensor out of axle beam.

Installing

• ‒ Renew clamping sleeve (=> Page 45-63 -item 2).
• ‒ Grease the O-ring of the speed sensor all around with lubricating paste
  G 000 650 before inserting.

• ‒ Connect speed sensor wiring and press into retainers.

Pay attention to the following points when routing the speed sensor wiring:

• ‒ → Route the speed sensor cable -1- in the area shown on the left and right below the brake pipe -2-.
• ‒ On the left-hand side, maintain a clearance of about 2 cm between the heat shield of the exhaust system and the speed sensor cable.

• ‒ → On the right-hand side, route the speed sensor cable -1- between the fuel lines -2-.
• ‒ Fit wheels and tighten to 120 Nm.

Checking rotor on rear axle

• ‒ Raise vehicle.
• ‒ Remove wheel.
• ‒ Pull speed sensor out of wheel bearing housing.
• ‒ Inspect rotor for signs of damage or dirt.

Removing and installing rotor on rear axle

Removing

• ‒ Raise vehicle.
• ‒ Remove wheel.
• ‒ Unbolt brake caliper => Repair group 46.
• ‒ Suspend brake caliper from bodywork.
• ‒ → Knock the grease cap off the wheel hub by means of light blows with the hammer on the claw of the special tool.

• ‒ → Press off grease cap.
• ‒ Remove split pin (=> Page 45-64 -Item 11-).
• ‒ Remove locking ring (=> Page 45-64 -Item 9).
• ‒ Remove hexagon nut => Page 45-64 -Item 8 -.
• ‒ Take off thrust washer => Page 45-64, outer wheel bearing and wheel hub.
• ‒ Drive off rotor => Page 45-64 with copper drift evenly through the threaded holes of the wheel hub.

Installing

• ‒ → Press rotor onto wheel hub.
• ‒ Fit wheel hub, outer wheel bearing and thrust washer onto stub axle.
• ‒ Remove hexagon nut => page 45-64 -Item 8 -.

• ‒ → Set wheel bearing play.

Note:

The wheel bearing play is set correctly if it is still just possible to move the thrust washer with a screwdriver by applying light pressure (on no account use lever action). To re-tighten, tighten the hexagon nut, but rotate the wheel during this step to avoid tensioning the bearing.

• ‒ Secure with locking ring and new split pin.

• ‒ → Knocking in grease cap

Note:

Damaged grease caps permit the ingress of moisture. That is why it is essential to use the tool shown in the illustration. A damaged grease cap must be replaced.

• ‒ Install brake caliper => Repair group 46.