This is a kind of high quality and durable key case. If you have a key with broken buttons or worn key case, this unit is the best replacement for you. Best replacement for a key with broken buttons or worn key case. Key case only. No electronic internals. This is an aftermarket replacement case. Take the internal electronics(include immobilizer/transponder chip) from original remote and place them to our key shell,then you are ready Good quality, durable to use. Features: Best replacement for broken or worn keys,or great for an additional key. Key case and key blade only. Not electronic internals. Get blade cut by local locksmith/dealer. Just cut the key blade, take the internal electronics(include immobilizer/transponder chip) from original remote and place them to our key shell,then you are ready There's no programming needed. Compatible with: for BMW 1-Series 2004 to 2006 E81 for BMW 3-Series 1999 to 2006 E46 (most) for BMW 5-Series 1997 to 2006 E39 E60 E61 (some) for BMW 6-Series 2004 to 2006 E63 E64 for BMW 7-Series 1995 to 2002 E38 (some) for BMW X3 2004 to 2009 E83 for BMW X5 2000 to 2006 E53 for BMW Z3 1996 to 2003 E36/7 E36/8 (some) for BMW Z4 2003 to 2007 E85 E86 Specifications: Product size: 9.1 * 3.7 * 1.4cm / 3.6 * 1.5 * 0.6in Product weight: Approx. 20g / 0.7oz Package List: 1* Key Shell Case Note: This item isn't a remote,it is just a remote key shell case replacement. There is NO interior (remote/electronics/transponder chip) unit inside. Please check your key look the same as the one in our product picture above before you purchase.