<p>This item isn't a remote key and it is just a remote key shell case replacement. Key case and uncut key blade only. Not electronic internals.</p> <p>Best replacement for a key with broken buttons or worn key case.</p> <p>There is NO interior (remote\/electronics\/transponder chip)unit inside.</p> <p>Just cut the key blade,take the internal electronic(include immobilizer\/transponder chip) from original remote and place them to our key shell,then you are ready!</p> <p>Compatible with: For 1-Series 2004 to 2006 E81</p> <p>For 3-Series 1999 to 2006 E46 (most)</p> <p>For 5-Series 1997 to 2006 E39 E60 E61 (some)</p> <p>For 6-Series 2004 to 2006 E63 E64</p> <p>For 7-Series 1995 to 2002 E38 (some)</p> <p>For X3 2004 to 2009 E83</p> <p>For X5 2000 to 2006 E53</p> <p>For Z3 1996 to 2003 E36\/7 E36\/8 (some)</p> <p>For Z4 2003 to 2007 E85 E86</p> <p>Product size: 9.1 * 3.7 * 1.4cm \/ 3.6 * 1.5 * 0.6in</p> <p>Product weight: . 20g \/ 0.7oz</p> <p>Package list: 2 x Key Shell Case</p> <p>Note:Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>