Thanks for all the response so far, the first option of a bmw tilt sensor is outside my area of expertise, I dont even know where the alarm module is, so Im looking at this:
https://www.ebay.co.uk/itm/282804208870
Does anyone know if this would work on my rover 75 2004?
p.s. where is the alarm module?
cheers guys
***just found out that it would'nt work on a rover *****