Keyless Entry for 89 535i

Hey, I have a 89 535i without factory keyless entry/alarm and I was wondering if anyone else has installed one and which brand would work with this car. Thanks a lot!
-Dan Griffin

for 145 you can get a viper alarm system, its the top of the line right now for car alarms, im pretty sure your BMW has PDL, just you dont have a button for it, but you have it pre-wired for it

Definately go with the Viper alarm. Heres a link for one for only $179, and it includes a remote start. http://www.cbrstereo.com/index.asp?PageAction=VIEWPROD&ProdID=1027&HS=1