My '03 doesn't have TPMS. It's a nice feature, but obviously comes at an expense.
My '07 BMW 328i TPMS sensors (original) are still working at 135000 miles. I expect they'll need replacement one of these days... the system definitely saved me from wasting a run-flat once. One morning, gave me an alert first thing, that wasn't there the night before. I got about 1/4 mile from home when the light came on, went home, pumped it to 40, then drove 1mi. to tire shop for a good repair.
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