2008 BMW CAS3+ ISTAP

**madsci69** · 11th January, 2020, 03:49 AM

I have a 2008 bmw e60 that has the cas3+ with ISTAP. This is my first time programming a key for a bmw with this update. The owner has no key, so I originally went out thinking this would be an easy OBD procedure. I am able to progress and pull the key data, the vehicle had 4 keys programmed into it. However, when I go to program the new key in, it tells me that there need to be 64 attempts before the key will program. Every time I attempt this, it seems to go through about 10 or 11 attempts, before telling me it has failed to program. From my preliminary research, I see I can program this with Tango by removing the Cas and DME to pull the ISN and write the keys in. I have also seen that the car needs 13+ volts if trying to program OBD for it to be successful. But others say that it could damage the CAS flash by attempting through OBD. What is recommended?

**crankycarl** · 11th January, 2020, 03:55 AM

what tool are you using?

**kljucservisbn** · 11th January, 2020, 04:06 AM

treba biti 64 pokušaja prije nego što se ključ programira.
Da li je sigurno reći da biste trebali pokušati 64 puta?
Ili je možda u obavijesti pisalo da možete pogriješiti 64 puta prije nego što je automobil krenuo u zaključavanje?
Siguran si da imas dobar kljuc?

Iskreno sada nisam ni siguran, vidio sam slično upozorenje, ali nisam 100% siguran o čemu se tačno piše, a prije nekoliko dana imao sam isti BMW i lako sam napravio ključ na OBD-u, ali sada nikad opet bez čitanja CAS eeproma, s ključem je dobro prošlo, ali napon je padao i nastao je haos, nekoliko dana sam riješio problem, sreća je uspjela.

**madsci69** · 11th January, 2020, 04:13 AM

So I need to attempt to program 64 times before it may succeed. Oh my....this is my first encounter with this. It says it needs to be 'started' 64 times. I will try and take a picture, I am going to return to the vehicle tomorrow. I am just not sure if I should spend the time trying to do 64 attempts...maybe it would be faster to pull eeprom and program that way.

**madsci69** · 11th January, 2020, 04:13 AM

I am using Autel IM608

**kljucservisbn** · 11th January, 2020, 04:16 AM

While I was looking for help information on a problem I had, I found this video. I absolutely agree with sir...

https://www.youtube.com/watch?v=5LP_G-G305k

**crankycarl** · 11th January, 2020, 04:38 AM

I also use the IM608, i just insert the key until it until I hear the relay in the key slot module lock in it

**madsci69** · 11th January, 2020, 04:45 AM

so when it is writing the key, I should be removing and reinserting the key?

**crankycarl** · 11th January, 2020, 04:56 AM

correct. often works within the first 2 dozen tries. if it doesn't work suspect other issues. also im608 can downgrade ISTAP, program your key, then upgrade istap

**madsci69** · 11th January, 2020, 05:00 AM

thank you, I will try that. I was just leaving the key in the ignition, I did not realize I had to do that for the programming. Will return to the car tomorrow and see if I am successful. Thank you! ^^

**madsci69** · 11th January, 2020, 05:30 AM

I remember, it does say it fails to write dealer key, so would this still work? Or is there something else wrong if it is failing to write the dealer key?

**crankycarl** · 11th January, 2020, 06:10 AM

do you have a spare key that is unlocked you can try? i haven't run into issue making dealer key ever

**madsci69** · 11th January, 2020, 06:17 AM

I have tried with two different keys. I have a third, but I don't imagine it would make a difference. I am able to 'pre-process' the key, but when it goes to write the key to the Cas, it tells me it fails. It will start writing the key, and the dash will light several times with the key symbol. Then the autel will tell me it failed to write the key to Cas.