Abs Impulse Wheel; Dsc Lateral Acceleration Or Rotational Rate (Yaw) Sensor. Replacing - BMW 5251 Service Manual

4
Disconnect and remove speed sensor electrical harness (ar-
row) from retaining mounts. (Lefl front wheel shown).
-
During installation, apply thin coat of StaburagsBNBU 12/K
or equivalent grease to speed sensor and housing.
-
Installation is reverse of removal.
Tightening torque
ABS
wheel speed sensor to steering knuckle or
8 Nm (6
It-lb)
rear wheel bearing carrier
ABS impulse wheel
The front and rear impulse wheels are integral with the inner
wheel bearing seal and not available as separate part. See
310 Front Suspension or 330 Rear Suspension for wheel
bearing replacement procedures.
DSC lateral acceleration or rotational rate
(yaw) sensor, replacing
DSC system on 1998 cars (Bosch DSC Ill v. 5.3): Lateral ac-
celeration sensor and rotational rate (yaw) sensor are sepa-
rate units, both mounted underneath or in front of driver's
seat.
DSC system on 1999 and later cars (Bosch DSC Ill v. 5.7):
Lateral acceleration sensor and rotational rate (yaw) sensor
are combined into one unit, located under driver's seat.
-
Remove driver's seat. See 520 Seats.
-
Lateral acceleration sensor (1 998 models): Remove lower
lefl door pillar trim (driver's kick panel) to access sensor. Pull
up carpet as necessary to reach sensor harness connector
or fasteners.
4
Rotational rate (yaw) sensor (1998 models): Remove plastic
trim at door sill to access sensor (arrow). Pull up carpet and
move insulation forward as necessary to reach sensor har-
ness connector or fasteners.
-
Combined lateral acceleration / rotational rate (yaw) sensor
(1 999 and later models): Remove plastic trim at door sill to
access sensor. Pull up carpet and move insulation forward as
necessary to reach sensor harness connector or fasteners.
-
Disconnect electrical harness connector at sensor.
-
Combined sensor (1 999 and later models): Remove sensor
bracket mounting screws.