Originally Posted by DrMcCo
I have an early MY 2009 which came pre-wired for alarm, likely as yours did. As I understand it, they stopped including the alarm pre-wiring in mid-MY 2009.
I bought the alarm kit from Tisher/getbmwparts.com for $225. It included 3 main components: A hood trigger switch, ultrasonic glass detection unit (goes in center dome light module) and a siren which goes in the left rear wheel well behind the fender liner.
I did the install myself with basic tools, but the alarm did need to be coded to operate fully.
I did notice, even prior to coding, that the clown nose would blink when the car was locked with these new components installed (it hadn't worked prior).
On the blinking clown nose after install and before coding the bling pattern was different. I think is was...blink, blink, pause, blink, blink, pause. That indicates "alarm installed but there is an error." After coding the blink pattern steady at one blink about every 5 seconds.