Back in May we had new tires put on my wife's 2016 CX-5. Since then, about three times now the TPMS light has randomly come on. Tire pressures are all normal when I check them. I have reset the light each time and it seems to stay off "for a while." I mentioned it to the Mazda dealer during a recent visit and tech said one of the sensors may be starting to go bad...if it starts doing it more frequently than it is likely time to switch all four...mainly because it would be very difficult to find which one. To save money (i.e. avoid dealer prices), are the sensors for this year/model in the standard location (i.e. integrated with the valve stem)? I read that some Mazdas actually have them located somewhere else...ABS I think. I just want to price the sensors and make sure swapping them out is as straightforward as other vehicles....I may just have tire place do it at next rotation/balance. If you know the part number...feel free to share Thanks.

 

The same thing has been happening on my girlfriend's 2021 CX-5 with almost 50k miles, but it's random and there's no reset button on this generation. It's definitely leaning towards a bad sensor, but considering our current set of tires barely have like 15k+ miles we'll just wait and see what happens. The tires for us have been filled to the door jamb's specs. It could be something stupid like a battery going bad.

 

There are various tools which can identify which sensor it is, and the Mazda dealer should have one (I bought one myself from Amazon).
You have a 2016 and at that age it's likely the sensor battery or they may have hit the sensor during the tire change, they aren't exactly the ruggedest things.
I would advise getting an original OEM sensor as you can have difficulties matching aftermarket ones with your vehicles system.

 

Mazda TPMS can activate if you have a sudden change in air pressure from as simple as driving in a winding hills or mountain, predominately on warmer or hot days. The Mazda TPMS is set to activate with 5psi difference from set psi. If you are under warranty Mazda will check the TPMS but very few are actually bad. Even out of warranty occasionally we get a MAZDA in the shop with the same complaint. After checking and finding no fault in the system the customer is always mad about being charged and say they know something is wrong. LOL

This cam up on another forum thread and I looked at our records for a 2 year period. 16 customer complaints about a TPMS waring light and only 2 that were the actual TPMS were found failed/failing. Of the 16 only 4 were Mazda from 2016-2020.

However DIY changing the TPMS more then 50% of TPMS related issues that bring their vehcle in TPMS warning continued to by active caused other problems directly from their service replacement of the TPMS.

There is a re-set procedure for all Mazdas. Go look for it on a How-To. Sorry when it comes to safety device setting I don't publish them. My thought is owners should seek a service shop, tire and wheel shop or dealership to do it.

 

Does this vehicle use tire pressure sensors in the wheels, or is it a wheel speed sensor integrated with ABS?

 

They are on the inside of each wheel attached to the valve stem.

 

The older ones used the ABS method (my 2014 is that way).

 

Another reason why I like my 1989 Mazda B2200......I can just check the tire pressure myself!

 

Nothing stops you from doing that on the newer vehicles; in fact, it is encouraged to do so. The vehicle manuals usually say that the TPMS systems are not a substitute for manually checking pressure. However, they are nice if you have an unexpected drop in pressure while driving which might alert you before you actually feel the drop and maybe prevent ruining a tire or having an accident.

 

That is correct, he was asking about his vehicle which is 2016.
The 1st generation CX-5 (2013-2015) used the ABS system.
2nd generation 2016 and newer use the valve stem system.