Description: 1. The selling item is an upgrade flip remote key. Frequency 315MHz or 433MHz, with ID44 chip. 2. The remote key includes key housing, circuit board, integrated chip and battery. It's a full remote key. 3. You'll need to program the key and cut the blade at locl automotive locksmith before using. 4. The key is suitable for EWS system only. (not ok for CAS system, please don't buy wrong type.) 5. The key blade is HU92. (not ok for HU58, please don't buy wrong type.) Compatibility: 2004-2006 1 Series E81 1999-2006 3 Series E46 1997-2006 5 Series E39 E60 E61 2004-2006 6 Series E63 E64 1995-2002 7 Series E38 2004-2007 X3 E83 2000-2007 X5 E53 1998-2003 Z3 E36/7 E36/8 2003-2007 Z4 E85 E86 Manual programming of the remote: 1. Working from within the vehicle and with the doors shut. 2. Turn ignition to position 1 and back to position 0 within 5 seconds. Remove the key from ignition. 3. Pre and hold the unlock button for 15 seconds, during the same time pre the lock button 3-10 times within 5 seconds. (if pre lock button 3 times doesn't work, you can pre it up to 10 times.) 4. Release both buttons. 5. Doors will lock and unlock to show correct programming has occurred.