Just out of interest, has anybody had to replace in-wheel TPMS sensors?
The Smart is in its 9th year, and will probably be run into the ground as it's cheap (zero VED, low insurance) to run, convenient for local journeys, and still quite fun.
The rear tyres are getting to the point where they are still quite legal but at the depth I'd prefer to replace them. The fronts had advisories on them beginning to deteriorate (cracking) at the last MOT, despite low wear. In any case, at their age they really ought to be replaced.
The vehicle has direct TPMS, however, with senders in the wheels, the batteries for which are generally rated at less than the years currently on the car (though apparently, battery life is also related to mileage, which is very low for the age). With new tyres all around, it seems sensible to consider replacing the sensors (the batteries are non-replaceable).
OE units are pretty expensive, but I can get aftermarket pre-programmed ones that will apparently "self-learn" on a Smart (no coding required) for a cost-effective price, so I'm off to a local tyre-fitter to see if they'll install these (obtained by me) as part of the change.
Not anything I've had to consider before, either because I've not had to change tyres due to age/mileage, or because the car has had indirect TPMS (working off the ABS sensors) like the current Volvo.
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