I have a BMW E90 and went out to install my LPP today. First I used some old speaker wire to find a guide of where I want to run the real deal. Well I stuck the speaker wire in the location where I wanted to install the sensor in the front and fished it in and looked under the hood... I realized the entire bottom middle part of the grill is sealed off and goes directly to the fan and radiator with no areas to run wires out of it, in fact when the car is on and the fan is on it creates a suction... So I moved to location #2 which are the 2 side grills on the car, ran the wire into it looked in the hood and no wire.. For some reason the two side grills are both ducted and move air into the brakes.. So I have no clue what to do or how to route the wires.
Does anyone have a BMW that can give me some insight?