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Discussion Starter · #1 ·
Does anyone here have any experience with (Mazda) TPMS sensors, specifically what would I look for in a sensor to work with the CX-30. Are all 315 Mhz sensors the same? With two sets of sensors, will the system need reprogramed each time I change wheels?
I intend to buy new summer wheels and tires. I will use my OE wheels to mount dedicated snow tires. The new wheels will require new sensors, the OE's will retain what they have.
 

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Discussion Starter · #3 ·
Nice, thanks!
That gives me a place to start. I looked up Autel, they have a small handheld for TPMS sensors. I was having issues getting the spec pages to load, I may have to call or email them on the specifics of the tool.
 

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The extract from the owner's manual below sets out the instructions to "code" new sensors to the car without the manufacturer's "box of tricks". Mazda do not put a condition on whose sensors can be used like this but is it safe to assume this?. AFAIK since the system uses radio transmissions to retrieve pressures there should be some manufacturer's certification in the documents supplied with a new car that will reveal who the OEM manufacturer is. My car is currently at the dealers so I can't check but I think they are made by Continental. Shrader site at https://catalogue.schradertpms.com/en-GB/mazda/cx-30/2019-11_2024-10.html shows Continental as the OEM supplier

When changing the tyres or wheels
(such as installing winter tyres), it will
be necessary to register the ID signal
code of the tyre pressure sensor to the
TPMS.
Have an expert repairer, we
recommend an Authorised Mazda
Repairer do the registration or register
the ID signal codes of the tyre pressure
sensors using the following procedure.
NOTE
The tyre pressure sensors on each wheel
have a unique ID signal code. For the
TPMS to operate correctly, the ID signal
codes of the tyre pressure sensors need
to be registered to the system.
1. Wait more than 19 minutes after
changing a tyre or wheel.
2. After more than 19 minutes have
passed, drive the vehicle at a speed
of about 25 km/h (16 mph) or
faster for 3 minutes or longer. While
driving, the ID signal codes of the
tyre pressure sensors are
automatically registered.
 

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2020 Mazda CX30 Soul Red Select AWD
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The extract from the owner's manual below sets out the instructions to "code" new sensors to the car without the manufacturer's "box of tricks". Mazda do not put a condition on whose sensors can be used like this but is it safe to assume this?. AFAIK since the system uses radio transmissions to retrieve pressures there should be some manufacturer's certification in the documents supplied with a new car that will reveal who the OEM manufacturer is. My car is currently at the dealers so I can't check but I think they are made by Continental. Shrader site at Schrader TPMS: Mazda CX-30 2019-11 2024-10 shows Continental as the OEM supplier

When changing the tyres or wheels
(such as installing winter tyres), it will
be necessary to register the ID signal
code of the tyre pressure sensor to the
TPMS.
Have an expert repairer, we
recommend an Authorised Mazda
Repairer do the registration or register
the ID signal codes of the tyre pressure
sensors using the following procedure.
NOTE
The tyre pressure sensors on each wheel
have a unique ID signal code. For the
TPMS to operate correctly, the ID signal
codes of the tyre pressure sensors need
to be registered to the system.
1. Wait more than 19 minutes after
changing a tyre or wheel.
2. After more than 19 minutes have
passed, drive the vehicle at a speed
of about 25 km/h (16 mph) or
faster for 3 minutes or longer. While
driving, the ID signal codes of the
tyre pressure sensors are
automatically registered.
I might just run my winter tires and wheels without sensors. However is this saying you do not need a computer to connect them to the car? You just drive with them on as stated above? How would it know the location of each tire?
 

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You just drive with them on as stated above? How would it know the location of each tire?
I had the same question - although the CX 30 manual doesn't go into the specifics, owners from other makes that have a similar TPMS registration process (or lack thereof) say their cars have individual receivers near/in each wheelwell to pick up the strongest signal.

I called a couple local Mazda dealers and they couldn't answer to that level of detail...maybe try your dealers and see if someone knows? I imagine it must be the same implementation - a central unit couldn't possibly differentiate the location of individual sensors?
 

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2020 CX-30 GS AWD polymetal grey
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9 Posts
I had the same question - although the CX 30 manual doesn't go into the specifics, owners from other makes that have a similar TPMS registration process (or lack thereof) say their cars have individual receivers near/in each wheelwell to pick up the strongest signal.

I called a couple local Mazda dealers and they couldn't answer to that level of detail...maybe try your dealers and see if someone knows? I imagine it must be the same implementation - a central unit couldn't possibly differentiate the location of individual sensors?
Which makes sense if the system automatically sync the wheels, like after a tire rotation your front wheels go to the rear. The Mazda dealer should be able to tell you if they have to reprogram the TPMS after a tire rotation or not?

Assuming this is the case, so we know the OEM TPMS would work automatically..... What about the aftermarket ones?

This is the first car I'm having with TPMS. I don't have any experience with them 😚
 

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Discussion Starter · #9 ·
I had the same question - although the CX 30 manual doesn't go into the specifics, owners from other makes that have a similar TPMS registration process (or lack thereof) say their cars have individual receivers near/in each wheelwell to pick up the strongest signal.

I called a couple local Mazda dealers and they couldn't answer to that level of detail...maybe try your dealers and see if someone knows? I imagine it must be the same implementation - a central unit couldn't possibly differentiate the location of individual sensors?
I have a 2017 Silverado with TPMS, each wheel has a pressure sensor/transmitter. What I understand about the operation, there is a single body control module that receives a unique signal from each of the four wheel sensors. These sensors have to be programed in a specific order (LF, RF, RR, LR) through the control module so the system "knows" the location of each wheel.
If you were to rotate the tires without reprogramming the system, the on-dash readout will not reflect the actual location of each tire/wheel.
 

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Discussion Starter · #15 ·
I thought I updated this thread once I received and installed my 2nd set of wheels with new aftermarket TPM Sensors, obviously I didn't.
The sensors I purchased for my summer wheels were Orange Electric 315 MHz. They paired with the car on their own, nothing to program. Same in reverse when I put my OE wheels back on at the beginning of winter.
 

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Mazda CX 30, 2021, Select, Machine Gray
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43 Posts
Sorry for this question, but it is related. I recently had to replace a wheel and the dealer made me buy a new sensor plus the valve because they told me that couldn't just replace the sensor with the old one since it has some piece (O ring?) that would break if they tried to do that. I tried my best to understand, but I had to return to work and had to leave the car and pick it up later. Can someone explain, please? Thanks in advance...
 

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Discussion Starter · #17 ·
Sorry for this question, but it is related. I recently had to replace a wheel and the dealer made me buy a new sensor plus the valve because they told me that couldn't just replace the sensor with the old one since it has some piece (O ring?) that would break if they tried to do that. I tried my best to understand, but I had to return to work and had to leave the car and pick it up later. Can someone explain, please? Thanks in advance...
I believe you were mislead. As far as I know there are kits available for reusing wheel sensors in the event you need to change out a wheel as in your case or if you replace tires. The kits typically have a new seal, valve core, and retainer. Wheel sensor life is generally considered to be approx. 10 years.
 
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