TPS - Battery life

[Santa-2512]

How long do the battery's in the tyre pressure sensors last?

Just noticed that my front sensor is slow to provide it's data to the kombi

the rear is fine, within a couple of hundred feet, i have the pressure in the kombi, the front can be almost a mile before the pressure is displayed


or can they be lazy and need a prod with a 911 or similar?

 

[M30SJM]

I replaced my rear sensor last year, my bike is a 2015 with 40k miles. Its probably a combination of age and miles. My front is now acting like yours, so i ordered on of ebay (255139206940) and will fit it one night this week.
The biggest hassle is taking the tyre off to mess with it, so for the £15 you might as well fit one.
Stu