I've heard so many different reports of lifespan but it seems to average around the 150K mark. However it spans from 10,000km up to 300,000km plus.
It seems the best thing you can do is get the feedback values read.
yep just check the values and worry about it when they are out.
My first original set had 180,000k on them and were still within spec, my new replacement ones starting going out by 50,000k and are now stuffed at 60,000k.
Same fuel stations used most of the time, same driving style etc. Go figure ??
Too many variables to give an accurate prediction but they should last 100,000+ i would hope normally but just keep and eye on the feedback figures and worry about it when you have to.
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