It's on the drivers side of the engine, against the trans, under the starter. It usually has a 4 pin connector on it and the connector is facing the front of the vehicle.
found it - thought this was the trany dipstick - fluid looks red.
Trouble code P0102 means: MAF Sensor Circuit Low Input Replace the Mass Air Flow Sensor
325CI
cubic
it has 214 horsepower
Its on the drivers side underneath the vehicle.....here is a diy for it. its for a 330ci, but its the same idea basically, and same location http://www.bmw330ci.net/maintenance/fuelfilter.php
inside the glove box
FILTER IS ON LEFT SIDE(DRIVERSIDE) FRAME RAIL UNDERNEATH THE CAR. USUALLY COVERED BY A BLACK COVER. IT IS LONG AND SKINNY AND IS GREY IN COLOR
i had the same problem it turned out to be a faulty wheel speed sensor
ralf schomp
Underneath the front passenger side area. Almost right below the front passenger seat. It's above a plastic plate with a few difficult screws.
The battery can be found in the trunk, under boot to the right hand side under the plastic cover. There is a positive terminal located in the engine bay on the top left hand side.