[masraum]

Originally Posted by GH85Carrera

In 29 years of owning my 85 911 I have never had to replace the tire pressure sensors. I check the pressure the old analog way. Never a water bump, power steering pump, no ABS problems and never once a check engine light!

Anyway, my wife's 2017 Macan is all the way up to 27,000 miles and the tires need to be replaced. There is a little more wear, but with summer approaching it is time for new tires. The factory delivered Pirelli tires are very noisy now and old.

Is it customary to leave a working system alone, or replace the sensors? Can just the battery in the sensors be replaced or is it the entire sensor? How long do they last?

If they have a 10 year life, it makes sense to me to replace them now. Should we use Porsche OEM sensors or aftermarket ones. The pressure monitoring system has worked well and it did let us know one tire was low when she picked up a nail. It was patched and still in place.

I have zero knowledge of the typical tire pressure monitors on modern vehicles that the US government has mandated all cars have. I have heard horror stories from others on various vehicles.

So I need some Pelican brain trust wisdom please.

You are a "replace it before it fails" kind of guy.

Originally Posted by David

I've never had a Porsche tire pressure sensor go bad and I've had 10 years and over 100k miles on them.

I think that pretty closely mirrors my experience.

I bought my '08 boxster in 2014 with ~21k miles on it. I would assume at 6yo with barely over 20k miles, it probably had the original TPMS in the 4 wheels. It's now 10 years later, and I don't remember anyone ever changing them out.