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Discussion Starter #1 (Edited)
TPMS Light After New Tire Install

I have a 2008 Cobalt. Last month, I bought new tires from Pep Boys. A week later, my Tire Pressure Monitoring System light started going off, and I discovered that one of my tires wasn't sending a pressure signal. Every time I would make an appointment to go get it checked out, the light would disappear. They claimed they couldn't make a diagnosis without a warning light.

Well, I finally went into the shop when the light was on. They claim that the battery in the unit is dead. This is despite not having any issues with the system since I bought the car in 2010. The guy claimed that the batteries start to die around 6-7 years, and that I should get them all replaced since the others are likely to start going bad. It would be $100 a piece. I declined.

Is 6-7 years the typical life cycle of TMPS sensor batteries, or do you think I was being played (since the life cycle magically lines up with the age of my car)?
 

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GM sells them for $24 Cdn so probably $20 USd. I have replaced one so far in the 08 G6 and none in the 08 Cobalt. some last 5 some last 10. Doesn<t hurt as much if you change them one at a time.
 

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I'm hoping that the ones in my MSRs on the Cruze just need batteries...bought them as working off ebay, but the dealer was only able to get one of them to sync up (come out of the deep sleep - they needed the "big tool"), so they're either broken, or just in need of a battery. If only they could manager to be changed without removing the wheel...

...or better yet, use electromagnetic force (or the rotational force of the wheel) to power/recharge the stupid things.
 
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