1997 BMW 528i Q&A
1997 BMW 528i Question: Alarm System
If it is a factory alarm, then the dealer is the one with the special coding tools, which are necessary. If it is an after market alarm and it is over 2 years old, the best thing to do is to replace it or remove it.They are not worth trying to repair and it is usually the module that is acting up which is usually not available after 1-2 years. - dandd
I WOULD CHECK THE CARS BATTERY IF YOU HAVE A FAULTY BATTERY IT DROP VOLTAGE AND THE ALARM THINKS SOMEONE IS OPENING THE DOOR OR TRUNK ETC.SINCE THE ARLARM WORKS BY VOLTAGE DROP SO BEFORE REPLACING ANYTHING TEST OR HAVE THE BATTERY TESTED. - gsxr1300
Alarm is activated by sensors all over the car. The two that fail the most are the hood sensor and the audio sensor in the car. The cars computer keeps a record of which sensor trips the alarm. The cheapest thing to do is to disconnect the hood sensor. It won't affect the alarm, it just won't be in the system to trigger a fault. Or you could pay the dealer or someone else who has a computer fault reader. - Visitor
The hood alarm switch plunger extension is made of plastic and snap off. My mechanic removed the switch and taped the plunger down in the off position. To reset the alarm, he inserted my key into the driver side door, turned the key to the right in the lock position and held it there for 30 seconds, then unlocked the key to the left twice. After that, no problems. Re. 1997, BMW, 528i, alarm problem. - Visitor
Even with the fuse 30 removed the system when off 'on its own' - any demon removal tips? Removing this fuse disabled the ABS, and traction control (not good).