To install and make these tire pressure sensor work, devices for example TPMS Sensor Tester, ATEQ or other reader or scanner is needed to read out the unique ID# of all TPMS and then upload those ID# to the computer to connect and program TPMS before installation. Please refer to your manual or ask your mechanic or auto store for help. Part number (OE# of your old part). Above carefully and compare them with your old part to make sure it is what you need. Condition: Brand New, High Quality. Material: Aluminum Alloy & ABS Plastic. Type: Tire Pressure Sensor. Fitment Type: Direct Replacement. Placement on Vehicle: Front Rear Left Right. 2010 BMW 535i GT. 2010 BMW 550i GT. (Please refer to compatibility chart for details). 4PCS x Tire Pressure Sensor.