Dear sir,
We have tried to activate the OEM sensor of 2011 Lexus ES series,we found it works properly,so,please check if the market you choose is right first.then,try to trigger the sensor again.By the way,dose this means you can activate the spare tire by saying "btw the problem on this Lexus was the spare tire"?If you can activate the spare tire,there must be some problems with your another tire sensor.If you can not activate all the tire sensor of the vehicle,would you please take some pictures about the OEM sensor to us for locating the issue,we will solve this issue as soon as possible,thanks! We are looking forward to your feedback.