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C5 2003 Fob1 problem ( Europe version)

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Old Oct 22, 2025 | 05:42 AM
  #1  
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Default C5 2003 Fob1 problem ( Europe version)

Good morning.
I have this problem.
My C5 doesn t have neither Fob1 nor Fob2.
in Europe the frequency is 433Mhz. In the USA is 315Mhz.
I tried to ask and search on internet for a 433Mhz Fob, but it seems that it is no longer available.

Someone know how to modify the electronic board of Fob 315Mhz to work with 433Mhz?

Thanks


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Old Oct 22, 2025 | 08:42 AM
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Originally Posted by Mauri_C5
Good morning.
I have this problem.
My C5 doesn t have neither Fob1 nor Fob2.
in Europe the frequency is 433Mhz. In the USA is 315Mhz.
I tried to ask and search on internet for a 433Mhz Fob, but it seems that it is no longer available.

Someone know how to modify the electronic board of Fob 315Mhz to work with 433Mhz?

Thanks
Sounds like conversion to 315Mhz is your best path.
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Old Oct 22, 2025 | 09:24 AM
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ok, but i think that is very expensive, because it is necessary to change the electronic module
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Old Oct 22, 2025 | 09:49 AM
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Originally Posted by Mauri_C5
ok, but i think that is very expensive, because it is necessary to change the electronic module
Not to minimize the cost, but you have a 25 year old foreign car.....everything will be expensive.
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