four wheel drive BMW 525i 2001 E39 Workshop Manual

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330-40
Rear Suspension
4 With an assistant applying brakes, break free and remove
staked collar nut (arrow).
- If equipped, disconnect brake pad sensor connector at brake
caliper.
- Remove brake caliper assembly and rotor. See 340 Brakes.
Leave brake hose connected to caliper. Suspend caliper as-
sembly from chassis using stiff wire.
- Remove ABS pulse sensor at wheel bearing carrier.
Remove drive flange from bearing assembly using impact
style puller
(BMW special tools 33 2 116, 33 4 201/202/203
or equivalent).
CAUTION-
The wheel bearing is destroyed when the drive flange is re-
moved. Do not attempt to reuse bearing.
4 Remove four wheel bearing flange (Torx) bolts (arrows)

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400-9
Body-General
Battery safety terminal
(BST)
4 Starting with 1999 models (9198 production and later), a py-
rotechnic (explosive charge) device automatically discon-
nects the battery positive terminal during impacts. Key
features,
like power windows and door locks, remain opera-
tional.
Security
Electronic immobilization (EWS)
Ignition key transponder signal All
E39 vehicles incorporate an electronic immobilization sys-
tem known as EWS. This svstem uses a wireless comrnuni-
cation link between a transponder chip in the ignition key and
the ring antenna surrounding the ignition switch. The EWS
control module blocks the starting of the vehicle unless the
correct coded ignition key is used.
NOTE-
Electronic immobilization is sometimes referred to as the
driveaway protection system.
Antitheft alarm (DWA)
This is adealer-installed option for which the E39 vehicles are
factory-wired. When armed, the system monitors door
loci(
contacts and trunk and engine hood locks and sounds a siren
if it detects tampering.
E39 interiors have a unique character, with a combination
of
sporty features and innovativedesign. All body versions were
made in a wide choice of interior and exterior colors. New col-
ors with matching leather or leatherette upholstery were intro-
duced for each model year.
Driving
comfort is enhanced by power steering, tilt steering
wheel, height-adjustable front seats, and electrically adjust-
able and heated rear-view mirrors. Inside the car there are
reading lights at four seating positions.