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BMW E90 315Mhz shifting key frequency
08-04-2019, 09:31 AM,
Post: #1
BMW E90 315Mhz shifting key frequency
I attempted to make a spare key for a pre LCI E90 from Japan with 315Mhz key.

Checked key with a frequency reader,
1. Lock button dead, not operational
2. Unlock button works but its frequency keeps shifting, sometimes 2xxmHz, sometimes 6xxmHZ, sometimes back to 3xx frequency, funny enough it unlocks the door ALL the time.

Made a key 315mhz both Chinese and original. Key starts car but does not operate locks at all!!

Are these some unique immobilizers with rolling frequency? I cant understand what is happening.
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08-04-2019, 14:26 PM,
Post: #2
RE: BMW E90 315Mhz shifting key frequency
Japan uses 315LP mhz, lp=low power
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09-04-2019, 14:09 PM, (This post was last modified: 09-04-2019, 14:10 PM by willisodhiambo.)
Post: #3
RE: BMW E90 315Mhz shifting key frequency
(08-04-2019, 14:26 PM)bryosb Wrote:  Japan uses 315LP mhz,  lp=low power

Yes, I know that. Are all japan cars LP? I checked vin decoder and it shows 315Mhz option, On all 315LP cases I have come across, the option is always clear in the options list AND IN VIN DECODER. With this info I have done several 315 and 315LP successfully relying on vin decoder frequency option . I will try a 315LP and see.
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09-04-2019, 16:45 PM,
Post: #4
RE: BMW E90 315Mhz shifting key frequency
Is the key that you made chinese ?
Because i had same probleme with chinese key
I change key and everything good
But you said with ori key same problem
Strange something wrong in the car

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10-04-2019, 05:42 AM, (This post was last modified: 10-04-2019, 05:47 AM by willisodhiambo.)
Post: #5
RE: BMW E90 315Mhz shifting key frequency
(09-04-2019, 16:45 PM)raffy haddad Wrote:  Is the key that you made chinese ?
Because i had same probleme with chinese key
I change key and everything good
But you said with ori key same problem
Strange something wrong in the car

Very strange. Someone suggested to me the car could have been a former security car. Not sure if security cars have rolling frequency. Will take the chance and make a 315LP key and see if anything changes.
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