this post was submitted on 03 Mar 2026
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TIL that these sensors transmitted via a wireless signal rather than being hardwired. I've never heard of them needing to be replaced due to dead batteries.
The system required to make them hard wired would be immensely over complicated to allow the wheels to still turn. Where ever the wire exits would also have been additional point for leaks to occur.
TPMS batteries last a long time because they are transponders, they use very little energy, but they eventually die.
The batteries last about 10 years.
I've had one die, and just waited to replace it until I needed new tires. It was like $100 extra to replace all 4, so I don't have to worry for another decade