[e60] key stopped working ..help needed

[crosswired]

hi guys,
suddenly, my master key stopped working (dropped keys on the floor), all seem to be ok, mean arms and disarms alarm, unlocking doors and boot but won't start the car ... when in ignition slot and turned to position 1 or 2 dash doesn't light up.
Battery is ok as tried with Mick new one without joy ..
any ideas how to fix it or how much will cost new one.
thanks in advance
kris

[Gar]

Sounds like the transponder chip has broke did the key smash open ?

[crosswired]

nope, mate .. from outside and inside looks intact

[Gar]

Best open it up and have look whats going on inside which key is it the diamond shape one is it ?

[crosswired]

its diamond shape, mate
inside all looks ok ..remote is working as usual only immobiliser part not

to make it even worst, spare key doesn't disarm alarm ...strange

[Gar]

Thats a doozy man , not sure where to go from here that chip can only ne written on once so recoding it is out if the question and if the transponder is still attached to the board then it just sounds like its shot :-(

[crosswired]

Thats a doozy man , not sure where to go from here that chip can only ne written on once so recoding it is out if the question and if the transponder is still attached to the board then it just sounds like its shot :-(

thanks, mate
..looks like have to call dealers then, question is what big damage will be...

[Gar]

For diamond key around 175e

[crosswired]

For diamond key around 175e

..ouch ...quite pricey

[Dave]

The lights should surely come on though, did the e60 not come with the wallet key and valet key?