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Old 08-18-2011, 01:42 PM
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QSilver7 QSilver7 is offline
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Location: Northeast Indiana
Join Date: Aug 2008
Posts: 9,043
Mein Auto: 1997 740iL / 2006 X5 4.4
Originally Posted by ilhb View Post
What you get with this is that you wont be able to start your car next time your key runs out of battery.
This coil is used to get energy to the rfid that unlocks the electronic blocking system. When you plug in the key, a signal is sent to the key by the car and the key sends a signal back to the car using part of the energy contained in the signal sent by the car. This energy is collected using, correct me if I'm wrong that shame coil you are removing.

Thanks for the post.
You are correct...and I've posted about this before...but it bares repeating. This is a link to a previous discussion about the induction coil being referred to incorrectly:

That is the induction coil used to keep the rechargeable battery inside the key recharged as well as the facilitating the induction for the EWS transponder chip which is also soldered to the IC board on the new style diamond shaped key.

(see 2nd paragraph in info below)
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; 08-18-2011 at 01:54 PM.
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