BMW e90 Alarm

[akashortie]

Looking to improve the E90's alarm as everyone has already read, BMW's are getting targeted. First move is to hide the OBD port!

Anyway, spoken to a couple of Alarm fitters and they reckon that any after market alarm linked into the Can bus system can also be deactivated through the OBD port.

Well BMW's security is crap, the siren is so quiet it would not wake me even with all the windows open, there is no brake glass sensor and the interior movement sensors are so poor, these thieves can access the obd without triggering the alarm.

Basically, im wanting to fit a second alarm (i do not want an extra immobiliser) and i want to have it on a separate circuit all of its own (so its not linked into the can bus system). I want an extremely loud siren, and high pitched interior siren, glass break sensor, tilt sensor, interior movement sensor (pager is a bonus but not essential), dont need things like remote start, indicator flashing and not bothered about having to use a separate remote to the key to arm / disarm it.

So has anyone got any suggestions.

Most alarms these days seem to have an immobiliser, can i just not connect the immobiliser and just use the rest of the system?

Im not really looking for anything to reduce insurance, not even bothered about thatcham approved. If someone breaks a window or puts their hand inside, i just want it to make a shat load of noise, enough to scare them off and to wake me as our bedroom is at the front of the house and we always have the top window open at night

Ideas on a post card please

[waxaholic]

Have a look on ebay, there is plenty to choose from.

[roofer]

Run direct from battery positive it won't interfere with Can Bus. You will need to put door switches in if you don't just want to rely on motion sensor though. I wouldn't rely on it sensing voltage drop when connected straight to the battery.

[akashortie]

roofer said:

Run direct from battery positive it won't interfere with Can Bus. You will need to put door switches in if you don't just want to rely on motion sensor though. I wouldn't rely on it sensing voltage drop when connected straight to the battery.

Cheers mare, thats what i was thinking, straight from the battery.

as most come with an immobiliser, with the alarm still work without connecting that feature up?

[E30M3SE]

You can simply leave the inmmobiliser disconnected and it will then operate just as an alarm, but they are available without the immobilisers, you want to look for Thatcham Cat2-1 upgrade systems, normally used on cars that have factory transponder immobilisers/touch key but no alarm fitted.

Autowatch 458 RL/T is one susch system, Cobra G368 is another.

Fitting will be fairly involved, as you will need pins on each door which will require drill holes in the a and B pillars and boot and bonnet pins also.

Edited by E30M3SE on Sunday 29th April 14:38