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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Guide: My key is damaged or lost; What do I do?



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      10-03-2019, 12:14 AM   #23
ctuna
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If it's a RED ELV signal it will not start till the ELV counter is cleared
or the ELV error resolved.
and or you have a good key . If the key battery is dead and its a
comfort access key replace the battery . If it's the rechargeable key
it should still start the car in the slot still you could try charging it
with a toothbrush charger or some other kind of inductive charger.
Make sure you fully charge the main battery and its over 12.4 Volts
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      10-03-2019, 12:19 AM   #24
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If it's a RED ELV signal it will not start till the ELV counter is cleared
or the ELV error resolved.
and or you have a good key . If the key battery is dead and its a
comfort access key replace the battery in the Fob (CR2032) . If it's the rechargeable key
it should still start the car in the slot still you could try charging it
with a toothbrush charger or some other kind of inductive charger.
Two types of keys Comfort Access Has a replaceable battery .
Non comfort access key is rechargeable.
Either key should start the car weather the battery in the Fob is charged or
not when its in the slot.
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      10-03-2019, 10:31 PM   #25
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Quote:
Originally Posted by ctuna View Post
If it's a RED ELV signal it will not start till the ELV counter is cleared
or the ELV error resolved.
and or you have a good key . If the key battery is dead and its a
comfort access key replace the battery in the Fob (CR2032) . If it's the rechargeable key
it should still start the car in the slot still you could try charging it
with a toothbrush charger or some other kind of inductive charger.
Two types of keys Comfort Access Has a replaceable battery .
Non comfort access key is rechargeable.
Either key should start the car weather the battery in the Fob is charged or
not when its in the slot.
I get that the car won't start with the ELV light on, but can't even put the car in the accessory position as it sits, and, with no power, can't get INPA etc to read/scan. Not being able to get accessory power is why I think either my key is no longer recognized, or I have a start/stop switch problem, or ???

Car is currently bricked in front of one of my garage doors. I'll check all of the fuses, again, tomorrow.
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I like broken things.
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      10-04-2019, 12:44 AM   #26
ctuna
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Check the battery voltage that means measuring it.
There should be more than 12 volts at the OBD connector.

Did you have Inpa working before this ?
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      10-04-2019, 06:41 AM   #27
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Great topic.

I have a question about CAS module replacement and not working key. Engine of my car is swapped to N46b20b with new ECU. They changed also CAS module, only one key opens the doors and starts the car. Previous owner gave me the other key but it doesnt work. As I understand from the topics other key is not defined in current CAS.

Non-CA
ECU -> 2011
CAS -> 2010
working key -> 5WK4 9125 868MHz (probably came with current cas module)
not working key -> 5WK4 9121 868MHz(probably orijinal key for the car)
Metal parts of the keys are completely same...

I went to local key repair shop, he said that not working key cannot be identified, get new blank key and it can be identified to car. Is there a way to identify this key? or I should buy blank key? if so, aftermarket 868mhz non-ca key is OK? such as: https://www.aliexpress.com/item/33031917681.html Or for not working key, transponder chip change is enough for reprogramming, https://www.aliexpress.com/item/32897099002.html

Last edited by ikaanb; 10-04-2019 at 07:06 AM.. Reason: Adding new link
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      10-04-2019, 09:24 AM   #28
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Quote:
Originally Posted by ctuna View Post
Check the battery voltage that means measuring it.
There should be more than 12 volts at the OBD connector.

Did you have Inpa working before this ?
Lol, Ill be busting out the multimeter.
INPA is unknown, it is a fresh load as my last laptop met an untimely end. I have not tried it on any other BMWs so TBD
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      10-04-2019, 12:55 PM   #29
ctuna
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Did you read the stuff at the beginning of this thread at all?
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      10-04-2019, 01:06 PM   #30
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Quote:
Originally Posted by ctuna View Post
Did you read the stuff at the beginning of this thread at all?
Multiple times . What part do you seem to think Im missing?
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