BMW X3 Owners Manual: Starting the engine
The engine starts automatically under the following conditions:
- Steptronic transmission: By releasing the brake pedal.
When Automatic Hold is activated: press the accelerator pedal.
After the engine starts, accelerate as usual.
Safety mode After the engine switches off automatically, it will not start again automatically if any one of the following conditions are met.
- The driver's safety belt is unbuckled and the driver's door is open.
- The hood was unlocked.
Some indicator lights light up for a varied length of time.
The engine can only be started via the Start/ Stop button.
Functional limitations Even if driving off was not intended, the deactivated engine starts up automatically in the following situations:
- Excessive warming of the car's interior when the cooling function is switched on.
- The steering wheel is turned.
- Steptronic transmission: change from selector lever position D to R, N or M/S.
- Steptronic transmission: change from selector lever position P to N, D, R or M/S.
- Fogging of the windows when the automatic climate control is switched on.
- Vehicle battery is heavily discharged.
- Excessive cooling of the car's interior when the heating is switched on.
The concept
The Auto Start/Stop function helps save fuel.
The system switches off the engine during a
stop, e.g., in traffic congestion or at traffic
lights. ...
Activating/deactivating the system
manually
Using the button
Press button.
LED comes on: Auto Start/Stop function is
deactivated.
The engine is started during an automatic
engine ...
Other materials:
BMW X3 Service & Repair Manual > Electronic switching or control units: Replacing crankshaft pulse sensor (N55)
IMPORTANT:
Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC
DISCHARGE (ESD PROTECTION) .
Necessary preliminary tasks:
Read out the fault memory of the DME control unit.
Switch off ignition.
Remove STARTER MOTOR.
Unlock connector (1) and remove.
Release screw (2) ...