![]() If your BMW battery is over seven years old, it may be time to change it. The car has a parasitic current draw when parked.Then, remove your finger from the unlock button. Battery voltage can drop for two main reasons: Hold the unlock button down, then press the BMW logo three times in rapid succession. If the battery voltage drops below 9 volts, the alarm may go off randomly. Low Battery VoltageĪn older car battery can trigger the alarm to go off as well. This will turn off the tilt alarm sensor and interior motion sensor. > Within 10 seconds, press the lock button again. The interior sensor on BMW can be disabled by following this procedure. It also may not work properly if the windows are open. The interior sensors may not work properly when the car is parked in congested garages. The tilt sensor’s purpose is to detect thieves who may try to steal the car, steal your wheels, or tow the car away without permission. There is also a tilt sensor that monitors the movement of the vehicle. Some BMWs are equipped with interior motion sensors that detect motion inside the car. What Causes BMW Alarm To Go Off Interior & Tilt Sensor Because the car does not know if you used a key or a lock pick kit etc to open the door. Warning – By disconnecting or disabling BMW alarm sensors the alarm system will not go off if someone tries to open the hood when the vehicle is locked. If you are getting a hood open warning message on the dashboard or your BMW alarm goes off randomly, the most likely cause is a defective BMW hood switch.Īnother common location for the BMW hood switch (bonnet switch or sensor) is near the driver’s side strut tower. The alarm may go off in BMW even when no one is near the car.This problem can affect BMW 1, 3, 5, 7, X1, X3, X5, and other series. The most common solution to fix this problem is replacing the BMW hood switch. If your BMW alarm keeps going off, the problem is often caused by a stuck or defective BMW hood switch. This guide covers some of the most common problems that cause the BMW alarm to go off or for no apparent reason. ![]() Why Does BMW Alarm Go Off After Locking?.
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