‘15 550 with what I assume are factory TPM’s. I used a digital pressure gauge to set cold tire pressure at 38 lbs. Three wheels read spot on at 38 and increase with tire temperature. The fourth sensor reads 40 lbs from the get go and increases from there.
Obviously not a big deal in the big picture of life, but I am interested in members’ thoughts on these things.
I understand that their batteries supposedly last up to 7-10 years.
Has anyone ever replaced them?
If so, what do dependable and accurate monitors cost?
Be well everyone..
Chuck

 

That sensor is probably bad. A new one costs $50-$100, plus installation.

 

thanks

 

If one sensor is acting up, the others are likely to follow soon. Replace them all and save yourself multiple trips to the tire shop.

 

No way to to replace the batteries, just have to buy new sensors. Not expenseive nowadays. I remember when MB TPMS sensors were a couple hundred dollars each.

 

Oddly enough, I've never had to replace a TPMS sensor on any of my cars, and I usually keep them till ripe old age ;-)

My wife's Honda uses 'indirect' pressure monitoring; the computer monitors rotational speed of each wheel and if a variance develops it attributes it to tire pressure and throws a warning light. The trade off is anytime I add air to the tires I have to do "learn" mode so the computer knows the new correct speed to monitor for.

 

Just schedule the TPMS replacement at the next set of new tires.

 

I had to replace my 20 year old ones on a Nissan, did it with new tires. Agreed just do it when you replace the tires, easier and less labor to deal with in the long run.

 

One of the sensors on my '16 Jeep JK has begun acting up, reporting low pressure when the tire inflation is yet OK -- right on schedule at almost 10 years. Likely the rest will soon follow. Plan to ignore until I buy new tires next Spring.