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Page 1 of 80

BMW X5 2003 E53 Central Body Electronics ZKE Manual Table of Contents
SubjectPage
Central Body Electronics (ZKE III)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Objectives of the Module  . . . . . . . . . . . . . . . . . . . . . . . .

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BMW X5 2003 E53 Central Body Electronics ZKE Manual 2
Central Body Electronics ZKE III
Objectives of the Module
After completing this module, you will be able to:
• List the functions directly controlled by the GM III.
• Describe how the GM III rec

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BMW X5 2003 E53 Central Body Electronics ZKE Manual 3
Central Body Electronics ZKE III
Central Body Electronics (ZKE III)
Purpose of the System
The Central Body Electronics (ZKE III) system manages the following functions:
GM III
• Windshield Wiping/

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BMW X5 2003 E53 Central Body Electronics ZKE Manual 5
Central Body Electronics ZKE III
The ZKE III system offers an overall reduction in vehicle wiring particularly in the areas sub-
ject to wear from movement such as doors, seats and the steering colu

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BMW X5 2003 E53 Central Body Electronics ZKE Manual 6
Central Body Electronics ZKE III
The following is an overview of new or changed features found on the E53 ZKE III variant: 
• Passenger’s door module is incorporated into the passenger’s door

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BMW X5 2003 E53 Central Body Electronics ZKE Manual The key data is stored in a transponder chip. The transponder chip is a wireless read and
write  EEPROM.  It  is  powered  via  the  ring  coil  at  the  steering  lock.  Power  is  applied  elec-
tro

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BMW X5 2003 E53 Central Body Electronics ZKE Manual Seat/Mirror/Steering Column Memory
Purpose of the System
The  front  seats,  outside  rearview  mirrors  and  steering  column  (if  equipped)  positions  are
electrically  adjustable.  The  “custom

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BMW X5 2003 E53 Central Body Electronics ZKE Manual 59
Central Body Electronics ZKE III
System Components
- with Principle of Operation
Manual Operation:The manual adjustments of the seat, mirrors and steering column are
carried out with the respective
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