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If it is merely failing to establish a proper connection with the key blade, then sure; however, if the transponder is compromised, no, unless you can procure a replacement transponder, solder it in, and have the technician program it into the vehicle's ECU, which I doubt you can do. If I were in th...

The transponder within the key is quite fragile and may be compromised, or, if fortunate, it may just be failing to establish proper contact with the key blade, which transmits the immobiliser code to the ignition.

Thank you for your assistance.
Tyre Brand: Michelin Front Tyres: Pilot Sport 4S

Rear - Pilot Sport The front and rear were replaced within six months of one another and were around one year old.
5-6 mm of tread remaining on all tires.

X Drive

I have seen that the acceleration has become irregular. There are little obstacles in the path. It continues to accelerate as expected. It becomes more apparent during aggressive acceleration. It is not synchronised with the gear shift. I have no warning lights or problems on the dashboard, and I ha...

The component number is same, but I cannot ascertain their compatibility. If it was functioning before and the reluctor rings were installed appropriately, I cannot see any other issue.

Do you possess the old sensors to ascertain whether a reading can be obtained, given that the issue seems to be confined to one side?

It would likely be the best option unless your vehicle is an ex-police or service model, I presume. The S100A was a potential option at the time of the car's order. Could you provide a link to the item you received as a replacement?

It is likely that you have acquired either the erroneous component number or substandard merchandise. My 2006 E91 320d lacks reluctor rings. I own the magnetic bearing variant. To ascertain the proper component number for your vehicle, you must input your VIN into Realoem.com. Do not purchase inexpe...