there should be a part number on the box. get that and you can find out for yourself in the parts shop.
as for what it is and what it does, i dont know. if the lights seem to work fine and the horn doesnt seem weak then you have eliminated the battery as a suspect. that the problem surfaced while the car was being driven would lead me to think that the problem is related to ignition, fuses or fuel. that the car doesnt crank at all could be a starter relay or something. but why would that crap out while driving unless its part of a circuit with something else.
anyway, good luck, keep us appraised.
__________________
'O=00=O'
bmw 2002.
long live the legend
|