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.Best replacement for a key with broken buttons or worn key case.There is NO interior (remote/electronics/transponder chip)unit inside.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 readyCompatible with: For E81 2004-2006 1 SeriesFor E46 1999-2006 3 SeriesFor E39 E60 E61 1997-2006 5 SeriesFor E63 E64 2004-2006 6 SeriesFor E38 1995-2002 7 SeriesFor E83 2004-2007 X3For E53 2000-2007 X5For E36/7 E36/8 1998-2003 Z3For E85 E86 2003-2007 Z4Product size: 11.1 * 3.9 * 1.7cm / 4.4 * 1.5 * 0.7inProduct weight: . 36g / 1.3ozMaterial: PPPackage Contents:1 x Key Shell CaseOnly the above package content, other products are not included.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.