zain
  •  zain
  • 97.60001% (Exalted)
  • Advanced Member Topic Starter
2018-10-23T11:36:16Z
Hi
i am trying to program a key for a E90 ,it asked me to do the cas firmware ,the car goes dead with that and the original key does not work , i did restore car is back to normal

How can i make a key please help
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rsachip
2018-10-23T16:46:48Z
Which part no. is your cas3 unit?some of them are critical but mostly downgrade work like a sharm..I would try downgrade again with stable voltage and without key in ignition is important.if failed again you can restore to its original state and do manualy with programer..read eeprom from mcu and isn from dme make key from dumps
BMWorkshop
2018-10-23T16:56:50Z
That is normal on some cars. I have sen it before. Just continue with the new key programming. After the restore everything should work.
zain
  •  zain
  • 97.60001% (Exalted)
  • Advanced Member Topic Starter
2018-10-23T19:40:43Z
I tried firmware downgrade and then key learning atleast 4 times did not work the part no of the cas is 61.35-9147196-01
Levanime
2018-10-24T01:25:37Z
So, what exactly is a problem?
Autohex_II_BMW
2018-10-24T06:09:49Z
Originally Posted by: zain 

Hi
i am trying to program a key for a E90 ,it asked me to do the cas firmware ,the car goes dead with that and the original key does not work , i did restore car is back to normal

How can i make a key please help


Its normal to lose ignition after you do cas firmware,you must continue with programming key and after programmed check if key recognized in slot from key learning option 1.
if it shows 'YES' in slot then restore CAS from cas firmware ,everything will be normal after that and new key will work too.
roxetteer
2018-10-24T06:15:38Z
Never had problems before with CAS Firmware. Works flawlessly.
zain
  •  zain
  • 97.60001% (Exalted)
  • Advanced Member Topic Starter
2018-10-24T10:04:27Z
after downgrade . and try and do key learning ,it cannot communicate with cas . if I try and cycle ingnition the steering lock will not open and there is a red steering with a lock signal in cluster
Autohex_II_BMW
2018-10-25T05:44:29Z
If no communications after cas firmware car in sleep mode,just make hazard lights ON and proceed