Brake Pad Sensor

On my bmw 325i front pads changed,indicator on dash still on,help!!

When you did your rear brake replacements, the sensor has also been replaced. It goes hand in hand with the brake pads. The brake pad sensor indicator light that is showing on your dash board will turn off eventually. Meineke had my brake pads replaced and all they had to do to turn the indicator off is press the brake multiple times until the light on the dash comes off...
Also, since you replaced the rear brakes, I'm assuming that the front brakes are in good shape...
bmwguy...   

turn the key on but not the engine running wait 30 seconds and start it. if that then the sensor is a problem

i found that on the 325 xi if you replace the pads in time before it gets too low you can just reset the light on the dash but if the pads get too low were it starts to rub the little electrical sensor on the driver front wheel it now trigger an open loop and no matter what you try the light will never go off until that sensor is replaced (welcome to the bmw world $$$) lucky that sensor is cheap like $27