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post #3 of (permalink) Old 12-02-2012, 01:19 AM
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Originally Posted by friendly_jacek View Post
I thought they were supposed to last 10 years?
According to this document from Toyota, the battery should last 10 years on average:

All Japan-built vehicles require the tire pressure warning valve/sensors to be
activated (”wake up”) during Pre-Delivery Service (PDS).
Each tire pressure warning valve/sensor is equipped with a lithium battery that has an average life span of 10 years.
If a tire pressure warning valve/sensor is removed from the wheel, the grommet
MUST be inspected and replaced if damaged.

As you can see in the pictures, the sensors use a regular 2450 lithium cell:


2008 Limited V6 2WD "The Silver Bullet"

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