Keys; Electronic Immobilizer - BMW 840Ci Owner's Handbook Manual

Electronic Immobiliser
26
The electronic immobiliser reduces
the likelihood of your BMW being sto-
len. It prevents the engine from being
started except with the car's correct

keys.

In addition to the mechanical match-
ing of lock and keys, this is achieved
by a special electronic component
integrated into the key.
The vehicle's electronics exchange
constantly updated signals, which are
individualised for every vehicle,
between the ignition switch and the
electronic components in the key. The
ignition, fuel supply and starter motor
cannot operate until the key has been
identified as valid.
b
The electronic components in
the key could become damaged if
treated violently. This could prevent
you from starting the engine.c
Obtaining a new key:
Spare keys are only available from
BMW Service, which is obliged to
check that you are entitled to order
them.
BMW Service can also invalidate indi-
vidual keys (e.g. if they are lost), or
reinstate them. The engine cannot be
started with an invalidated key.
Keys
1 Master key with transmitter for
remote control
2 Spare key to keep in a safe place,
e.g. in a purse or wallet. This is a
master key, but is not intended for
regular use
3 Key for doors and ignition.
This key does not operate the lug-
gage compartment or glove box
lock. It is useful at a hotel, for
example.
The passenger's door has no outside
lock, as an additional precaution
against theft. The safety button on the
passenger's door does not operate
the central locking system.
Online Edition for Part-No. 01 41 9 790 191 - © 12/98 BMW AG