Warranty extension for fail-safe thermostat

M

Martyd

:
2023 CX-5S Select
FYI
Received a letter from Mazda notifying me of an extension of the warranty on the fail-safe thermostat inside of suspected coolant control vale. Covers 2018 to 2025 CX-5's, as well as some Mazda 3, CX-3, Mazda6 and CX-30. Coverage will extend to 15 years / 150000 miles, whichever comes first. You may get a trouble code of PO126. You may notice symptoms of long warm up etc.
I had a 2018 and now drive a 2023. I have said to myself more than once how fast the 2023 warms up compared to the 2018. Seeing this extension program really makes me wonder about the thermostat in the 2018.
Two hour inspection and repair. If your old like me a thermostat change takes about 20 minutes.
 
I just had that fix done on my '22 a few weeks ago for the same symptoms. Coolant control valve was replaced; took about 2 hours. From what I understood, this is applicable to those with cylinder deactivation (like mine).
 
From the paperwork, it looks like a check engine light will be present correct?

My 2023 CX-5 non-turbo coolant temp hovers around the half way point (either one notch below, at, or sometimes one notch above the half way point) If it's cold out usually it will hover lower than this (maybe 2-3 notches below the half way mark. I'm assuming it's normal as the cars not throwing any codes right?

It warms up fine even when cold. It'll obviously take longer when cold but I'm more concerned about where the gauge sits. Can anyone confirm if this is normal behavior for my piece of mind please? Thanks for reading.
 
elementCX5 said:
From the paperwork, it looks like a check engine light will be present correct?

My 2023 CX-5 non-turbo coolant temp hovers around the half way point (either one notch below, at, or sometimes one notch above the half way point) If it's cold out usually it will hover lower than this (maybe 2-3 notches below the half way mark. I'm assuming it's normal as the cars not throwing any codes right?

It warms up fine even when cold. It'll obviously take longer when cold but I'm more concerned about where the gauge sits. Can anyone confirm if this is normal behavior for my piece of mind please? Thanks for reading.
Click to expand...
The gauge behaviour you describe is normal, nothing wrong there.

When my '22 experienced the thermostat issue recently, it would take about 5 minutes to warm up to about 1/4 of the way along the gauge (outside temperature was 10C, or 50F). It then stayed at that point for another 30 or so minutes of continuous driving and then it would start moving toward the middle of the gauge. It was like this for a couple of weeks with no check engine light, but all my driving was in city and suburban 2-lane routes. When I then took it onto an expressway and got up to speed, the check engine light came on.

It is important to note that this issue occurs only on those with cylinder deactivation (like mine). If yours does not have CD, then in all likelihood it will not experience this issue.
 
SimpleCanuck said:
The gauge behaviour you describe is normal, nothing wrong there.

When my '22 experienced the thermostat issue recently, it would take about 5 minutes to warm up to about 1/4 of the way along the gauge (outside temperature was 10C, or 50F). It then stayed at that point for another 30 or so minutes of continuous driving and then it would start moving toward the middle of the gauge. It was like this for a couple of weeks with no check engine light, but all my driving was in city and suburban 2-lane routes. When I then took it onto an expressway and got up to speed, the check engine light came on.

It is important to note that this issue occurs only on those with cylinder deactivation (like mine). If yours does not have CD, then in all likelihood it will not experience this issue.
Click to expand...
Great! That's what I figured. I do have CD as well. I appreciate you responding so quickly. Puts my mind at ease knowing it's intended behavior and not a part on its way out. 👍
 
Called my dealership about this because I’m having what I am sure is a thermostat issue— car refuses to warm up past ~165F unless I drive a really long time. They said unfortunately they can’t do the service under this program unless the P0126 error code is present (my check engine light is not on). Kinda bummed.

Anyone have ideas on how to get that error code to trigger manually? I don’t imagine I can achieve that with OBD II, right?
 
brownbearuva said:
Called my dealership about this because I’m having what I am sure is a thermostat issue— car refuses to warm up past ~165F unless I drive a really long time. They said unfortunately they can’t do the service under this program unless the P0126 error code is present (my check engine light is not on). Kinda bummed.

Anyone have ideas on how to get that error code to trigger manually? I don’t imagine I can achieve that with OBD II, right?
Click to expand...
That is exactly what I was experiencing. The check engine light did not come on until I drove onto a freeway and got up to speed (65-70mph). So that is my advice: Take it onto the freeway.
 
SimpleCanuck said:
Yes it does, for those with cylinder deactivation. Case in point: Me. :giggle: You can read my comments about my experience above in this thread.
Click to expand...
Amazing! Thank you! Did the dealership give you any trouble claiming the extended warranty repair?

If you don’t mind, what dealership did you use for the repair?
 
To confirm. I did not receive such letter for my '22 Turbo.
Seems to be N/A only (which has CD).
 
I got a check engine light with code p0126 driving home a couple days ago. Just dropped it off at Mazda and am getting the warranty work performed. Car just seemed to not get past 1/3 on the coolant temp gauge when driving at freeway speeds and the code appeared.
 

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Martyd said:
FYI
Received a letter from Mazda notifying me of an extension of the warranty on the fail-safe thermostat inside of suspected coolant control vale. Covers 2018 to 2025 CX-5's, as well as some Mazda 3, CX-3, Mazda6 and CX-30. Coverage will extend to 15 years / 150000 miles, whichever comes first. You may get a trouble code of PO126. You may notice symptoms of long warm up etc.
I had a 2018 and now drive a 2023. I have said to myself more than once how fast the 2023 warms up compared to the 2018. Seeing this extension program really makes me wonder about the thermostat in the 2018.
Two hour inspection and repair. If your old like me a thermostat change takes about 20 minutes.
Click to expand...
We also received the " letter " from Mazda about the thermostat valve- I also just traded my 23 for a 25 -- so they were both getting up to correct temp on the PP its an oval manual gauge which settles at just below 210 -- far out of the blue range -- I suspect that driving under temp can be damaging due to improper lubrication all through the engine - So If I see it occur on my 25 its going in asap -
 
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