I have two sets of rims/tires with 8 sensors (summer/winter). When swapping back and forth, the sensors were always picked up by the machine almost immediately. The second set of sensors I had previously (the first set came with the car) were Ford factory but did not require a dealer or other programming, they worked as is. The ones I just bought are not read by the machine, nor does the machine's relearn procedure recognize them.
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