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Old 03-26-2011, 03:41 PM
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QSilver7 QSilver7 is online now
Officially Welcomed to the 'Fest
Location: Northeast Indiana
Join Date: Aug 2008
Posts: 9,032
Mein Auto: 1997 740iL / 2006 X5 4.4
Pics & Technical Info about the New Style Key (diamond shaped)

Thanks you lukas22rojas for posting a pic of that coil UNWRAPPED. As I've stated in previous posts...some of the DIYs for the new style key have ERRONEOUSLY referred to the copper (charging) coil as the transponder...and I've even posted a PIC that actually shows where the transponder is located on the new style (diamond shaped) key. It is the small square chip (soldered to the circuit board) next to the copper coil.

To whomever took the pic below...I apologize for amending it without your permission...but the (EWS) transponder chip is identified for those who may be confused by previous DIYs that incorrectly identify the copper charging coil as the transponder. The coil receives a signal from the Ring Antenna which charges the battery inside the key.

And here's BMW technical info that explains how the NEW STYLE KEY (diamond shape) has a rechargeable battery that is kept charged though induction by a signal sent from the Ring Antenna to the copper charging coil on the key's circuit board.

Q {BMW CCA Member #191509}
2006 E53 X5 4.4i (Sterling Gray) 12/05 mfg date <<~>> 97 740iL (Arctic Silver) 3/97 mfg date
99 540iT (Orient Blue) <<~>> 95 525IT (Alpine White)
91 735iL (Schwarz Black) <<~>> 85 325e (Bronzit)

Last edited by QSilver7; 03-26-2011 at 04:46 PM.
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