
BMW TOOL User Manual
6
2.Overview
2.1. Noun explanation
BMW: Bayerische Motoren Werke
EWS: Immobox used in earlier BMW cars
CAS: Car Access System(40 unit), mainly include CAS1(0K50E), CAS2(2K79X),
CAS3(0L01Y), CAS3+(0L15Y, 0M23S), CAS4(1L15Y, 5M48H), this document will
only use CAS1, 2, 3, 3+, 4, 4+ to express, don’t write detail mask. If document have
detail mask indicates the special explain to this type
FEM/BDC: BMW after 2014 parts of new models with latest immobox
OBDII method: connect VVDI2 to car with OBDII interface
CAS Plug: It is not a standard device, need buy for extra. Communication with CAS
through CANBUS 100Kbps
CAS3+ encrypt version: Sometimes we call CAS3++. When the car (not encrypt
version) start, CAS will verify key, engine will verify CAS. But for CAS3++ type,
engine will verify key in addition. So add key for this type need working key or ISN
support. For the above reason, the introduction for CAS3+ is also applicable for
CAS3+ encrypt version. Expect write no applicable for CAS3+ encrypt version
ISTAP Version: Strictly, ISTAP belong to CAS3+ encrypt version, the only different is
that we cannot read CAS immodata by OBDII for ISTAP version. Fortunately, we can
OBDII read ISTAP CAS immodata by update CAS flash. VVDI-BMW update ISTAP
version flash only need 10 minutes. So the introduction for CAS3 encrypt version also
applicable for ISTAP version, expect write not applicable for ISTAP
ISN: Identification Serial Number, this value use to verify engine with key. 16 bytes
CAS3+ encrypt version(not ISTAP) SN: 9226238, 9227053, 9237046, 9237047
ISTAP version SN: 9262360, 9262361, 9278745, 9278746, 9287534, 9287535,
9267608, 9267609
CAS4+: Parts of F series chassis immo system
FEM/BDC: New model of F series chassis immo system
All Key Lost: The car lost all working key, there is big different from add key with
working key. Note: before OBDII communication, you need open dangerous light,
press on the brakes for several times to active OBD communication
2.2. Options
Detail can be found in chapter 3 Options
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