Purpose of the System

New Service Concept for 2007 X5: Condition Based Service

Condition Based Service (CBS) is a development of the Service Interval Indicator System. Sensors built into certain components and control unit algorithms take even more detailed account of the various conditions of vehicle use. The remaining times for selected maintenance tasks as well as any dates for State and/or Emissions Inspections (determined by the state in which the vehicle is registered) are displayed individually:
- Engine oil
- Brake Pads- front and rear are calculated separately
- Brake fluid
- Vehicle check (traditionally referred to as "Inspection I" or "Inspection II")
- State Inspection

CBS thus determines the current and future maintenance requirements. The current Status of Service items determined by the CBS are shown in the Instrument Cluster. To view additional information on service and maintenance operations in the Control Display, select the "Info Sources", then the "Service" menu.

a. Select "Service Requirements" (in upper left corner of screen) and confirm
b. Select "status" and confirm
- Symbol highlighted in green: No service is currently required.
- Symbol highlighted in yellow: Service deadline is approaching.
- Symbol highlighted in red: Service deadline has already passed.

This data can also be read from the vehicle key by using the Key Reader, as the vehicle's current service status is automatically saved in the ignition key every time the key is used to operate the vehicle. Since the key reader uses the input from CBS to recognize all pertinent service requirements which must be addressed at the time of the service appointment, a customized service maintenance list is printed out for specific operations. Therefore, the 2007 X5 Series no longer utilizes a conventional Service Maintenance Checklist, such as that utilized for the 2006 E53 X5.

SERVICE RECOGNITION
The vehicle recognizes when a service is required using the following three methods:

A. Adaptive using sensor technology and algorithms to determine the required maintenance of a service item depending upon individual customer driving style. For example:

Oil change is determined from engine oil condition sensor which monitors the oil condition, oil level, and oil temperature, and from additional algorithms using these parameters: engine load, fuel consumption, time and distance since last oil change.

Air conditioning microfilter replacement is determined from algorithms using these virtual sensors: rain sensor, ambient air temperature, fan speed, air circulation, driving speed, heating use, time and distance since last oil change.

Replacements of front and rear brake pads are determined from 2-stage brake lining wear sensors located on left front and right rear brake pads, and from residual wear algorithms using these input parameters: travel distance, wheel speed, braking pressure, braking time, and braking frequency.

B. Fixed Time (months) to determine the required maintenance of a service item. For example:
Brake Fluid and Engine Coolant changes.
State Safety and Emissions Inspections.

C. Fixed Distance (miles) to determine the required maintenance of a service item. For example:
Vehicle Check.
Spark Plugs replacement.