Hello and welcome to JustAnswer BMW,My name is XXXXX XXXXX it will be my pleasure to assist you today.
Can I please have the last 7 digits of the vin of your vehicle to pull up the proper diagram?
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Thanks for your patience.
The rdc antenna is located at the rear of the drivers side front wheel well. You will need to get behind the wheel well / fender liner to access it.
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I hope that is helpful, please let me know if you have further questions, or if I can clarify anything for you.
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The information I have provided is 100% correct.
B46a is the antenna. There is only one.
It is NOT one of the 4 senors that communicate with the tire sensors. B43a is one of those 4 sensors. B46a is the RDC antenna.
Please let me know if you have further questions.
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thank you in advance.