Coolant Leak Lawsuit Investigation for the CX-5, CX-9 and Mazda6

yrwei52 said:
Sorry to hear that, and hope you somehow find a way to resolve the problem with minimum loss. Yes you should come here before you made the purchase, and read the related discussions. This cracked head problem usually won’t be reflected by usual reliability stats such as Consumer Reports, but once it happens, it’d cost an arm and a leg to fix it unless you can DIY on such task.

BTW, the related TSB claimed the cylinder head has been updated since MY 2021 for the 2.5T where the cracked head symptom is coolant leak. OTOH, the cracked head on the 2.5L NA with cylinder deactivation has symptom of oil leak, and Mazda has never updated the cylinder head since the engine came out in 2018 MY. This thread and class action lawsuit is only for the 2.5T. Since you have a 2021 CX-5, can you verify what kind of engine do you have, a 2.5T or a 2.5L NA with CD? And how many miles on it?
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I am not for sure tbh, I took it in to have the recall fixed something with a heating valve and the oil change done and not even a week later I start over heating and take it back and they say it either a blown head gasket or cracked head but can't tell me which unless they take it apart and don't want to do tht bc it will cost me more money... so they just want to put a used engine in altogether

I had a close friend also look and coolant is visible so I'm assuming has to do with mazda not taking care of the problem
 
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yrwei52 said:
For a major problem like the cracked head, I simply don’t believe any reputable car manufactures would allow that 1% failure rate to a new product. Mazda didn’t know the head would crack when they added the turbo and cylinder deactivation with a modified cylinder head on a previously reliable 2.5L. Besides, this’s a major problem no one can predict until is happens.
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That was the point of my post, to show our quality/reliability goals were much lower. A 1% fail rate during production testing was unacceptable. Our requirement was single-digit ppm at the assembly plant.
 
cparks said:
I am not for sure tbh, I took it in to have the recall fixed something with a heating valve and the oil change done and not even a week later I start over heating and take it back and they say it either a blown head gasket or cracked head but can't tell me which unless they take it apart and don't want to do tht bc it will cost me more money... so they just want to put a used engine in altogether

I had a close friend also look and coolant is visible so I'm assuming has to do with mazda not taking care of the problem
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Sounds like the dealership screwed it up and caused the overheating issue by replacing your thermostat " water valve" if in fact you had a problem with it in the first place. What symptoms did you have that you took it to the dealership in the first place?. There was no recall, but possibly a TSB which would not have been covered anyway since you are out of warranty. Did you pay for this repair out of pocket? There are so many variables here it seems that either you don't really know what's going on or not giving the whole story.

You need to have the cooling system pressure tested and left overnight pressurized to see if there is a coolant leak. If there is, it could be from the job they just did and not the head. Have you checked the oil dipstick for coolant mixing in? Have you done a exhaust gas block test on the overflow bottle to see if exhaust gasses or present? They sell a simple $30 kit to do that yourself on Amazon which comes with special liquid that changes color when it reacts to gasses. You do not need a new engine if oil and coolant did not mix. Something fishy here. Need more info
 
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So, I see most people posting about the 2.5 turbo. But don't really see anyone posting about the 2.5NA engine (oil leak or cracked head).

Just curious if any owners are having this issue with the 2021 CX-5 sport 2.5NA?
 
txt990 said:
Are there any recent threads with owners having the cracked head with the 2.5NA? Just curious.
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You can do a search in the CX-5 Powertrain subforum to see. I don't recall any though.
 
Conrad 16.5 said:
Which Vehicles Are Under Investigation?

2019-2020 Mazda CX-5, 2016-2020 Mazda CX-9 and 2018-2020 Mazda6.

www.classaction.org

Mazda Coolant Leak Lawsuit Investigation

Complaints from CX-5, CX-9 and Mazda6 drivers and a technical bulletin from the automaker have led attorneys to investigate reports of coolant leaks and the viability of a class action. Learn more.
www.classaction.org www.classaction.org

What’s Going On?

Attorneys working with ClassAction.org are investigating whether these Mazda vehicles suffer from an engine coolant defect and, if so, whether a class action lawsuit could be filed.


How Could a Class Action Lawsuit Help?

A class action lawsuit against Mazda could force the automaker to pay for prior and future repairs related to the leaking coolant problem.


What You Can Do.

If you own or lease one of the vehicles under investigation and experienced a coolant leak, help the investigation by filling out the form on this page and sharing your story. Attorneys need to hear from as many drivers as possible as they look into the viability of a class action lawsuit against Mazda.
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I have a 2019 cx9 and this is exactly what happened. Extended Warranty didn't want to cover at first. They asked for two additional break downs and finally covered it. The only covered replacing motor not additional breakdowns. Total was 11000. They covered 6000. I owe 5000. I am single mom and can't afford 5000
 
myshelle34 said:
I have a 2019 cx9 and this is exactly what happened. Extended Warranty didn't want to cover at first. They asked for two additional break downs and finally covered it. The only covered replacing motor not additional breakdowns. Total was 11000. They covered 6000. I owe 5000. I am single mom and can't afford 5000
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Put your claim in for mazda to cover the 5000 as per the instructions in the link as per my previous post:

youri said:
Owner who want their previous repairs reimbursed will have 6 month after the letter mailing date to claim the repair. See the details here:

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myshelle34 said:
I have a 2019 cx9 and this is exactly what happened. Extended Warranty didn't want to cover at first. They asked for two additional break downs and finally covered it. The only covered replacing motor not additional breakdowns. Total was 11000. They covered 6000. I owe 5000. I am single mom and can't afford 5000
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if the repair hasn't been done yet, take it back to Mazda. With the settlement you won't have to go through the extended warranty company at all
 
txt990 said:
Are there any recent threads with owners having the cracked head with the 2.5NA? Just curious.
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Thru my research earlier this year, the cracked head that results in an oil leak can occur from 2018 thru 2023 NA models. At least thats what I made of things. Unless Mazda can say different which they won't ever explain otherwise. I only speaking of NA.
Not Turbo engines or the coolant leak issue.
 
walt said:
Thru my research earlier this year, the cracked head that results in an oil leak can occur from 2018 thru 2023 NA models. At least thats what I made of things. Unless Mazda can say different which they won't ever explain otherwise. I only speaking of NA.
Not Turbo engines or the coolant leak issue.
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It seems to be very rare for the NA engines. I don't think I have seen any owner on this forum report the cracked head issue with the 2.5 NA engine. Seems to be a lot of issues with the turbo engines from what I can gather.
 
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