3 Series E90 330i (N52) SAL
The starting value is calculated linearly up to 100,000 km. Above 100,000 km, the DDE control unit makes an
adaptive calculation based on the exhaust-gas back-pressure.
With increasing mileage, the exhaust-gas back-pressure in the diesel particulate filter increases. The exhaust-
gas back-pressure is recorded by the exhaust back-pressure sensor.
The "diesel particulate filter" interval is flexible and dependent on the operating conditions.
When resetting, the last value of the interval forecast is taken as the starting value for the new interval.
Microfilter
*changed with new definition*
The condition of the microfilter is calculated by the IHKA or IHKR control unit on the basis of the following values
(= virtual sensor):
•
Ambient temperature
•
Wiper operation
•
Useful life of the heater
•
Air recirculation mode
•
Vehicle road speed
•
Fan speed
•
Distance driven since the last filter change
•
Time
A filter change is due after 24 months at the latest.
The "microfilter" interval is flexible and dependent on the operating conditions. When resetting, the last value of
the interval forecast is taken as the starting value for the new interval.
Important: Maintenance needed after resetting the microfilter.
After resetting the "microfilter" element of the maintenance work, the battery must not be disconnected
immediately. Wait until the vehicle has gone into sleep mode.
Front and rear brake pads
The condition of the brake pad is determined by the DSC control unit. The calculation is based on a signal from
the brake pad wear sensors at 2 points (4 mm and 6 mm). The condition of the brake pad is determined with
the help of the following input values:
•
Wheel speed
•
Braking pressure (determined by the open duration of the exhaust valve)
•
Temperature of the brake disc (determined via a computer model consisting of wheel speed, brake
pressure, ambient temperature, braking duration)
•
Brakes service life
The "brake pad" interval is flexible and dependent on the operating conditions. When the interval is reset, the
last value for the interval forecast is set as the starting value for the new interval (only if new brake pads are
recognised by intact Brake pad wear sensors).
Spark plugs
*changed with new definition*
The distance-dependent interval for the spark plugs is managed in the instrument cluster (60,000 or 100,000
km, depending on the engine).
SBT Condition Based Service E87, E90, E91, E92, E93
BMW AG - TIS
20.02.2013 06:58
Issue status (12/2007) Valid only until next DVD is issued
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