Turning a non remote master key into a remote key?

[phathom]

Originally Posted by wpoll

Have you considered option E. ?

BMW Complete Remote Transponder KEY Suits 3 5 7 Series X3 Z3 Z4 ETC | eBay

Yes, that was my original option A. The problem is the coded transponder. The dealer can't code it, even if I get it cut right and program the fob, it will not start the car.
The options for a key that will start the car are,
A) have the dealer order a cut and programmed transponder mey from BMW.
B) Have someone with a key programmer like an AK90, pull the code lost from your EWS module and code it to a new cut key. This normally involves pulling it and sending it out. After 2004, the EWS modules came with tamler lrotection. In order to hook it up to pull codes, you also need to solder on 4 wires to the board as well. Failing to do this or doing it wrong results in the EWS going into protect mode and it wipes itself, essentially bricking it. That's not cheap to replace. Then you're replacing the mlduland the keys from the dealer and having your DME recoded to the new EWS to match the rolling code keys. Because of this, option B is less desirable.

So that puts me back to the more affordable option of getting a dealer transponder key and an aftermarket fob. Thrn either trying to Frankenstein them together or use them separate.