Class action settlement for defective exhaust valve seals/oil burning on 2021 CX-5, CX-9 2.5T etc

[N7turbo]

There are two different issues at play here. The one which was settled with the class action is for the valve stem seals (2.5T motors only) which caused loss of oil. There is another issue, cracked heads due to a casting defect, which is NOT covered under the class action (this occurs in both 2.5 NA and 2.5T motors). That issue is what leads to loss of coolant and engine failure. As far as I know, Mazda has never released a warranty extension for the cracked head issue- they just fix some under good will on a per case basis.

Due to the different locations:

Cylinder head crack on NA engines causes an oil leak.

Cylinder head crack on turbo engines causes a coolant leak.

You're right that the valve stem seals on certain turbo engines caused oil consumption, but not a leak.

 

[chickdr]

Doesn't the head crack cause both in both engines? Also, no class action settlement on the cracked heads for either motor.

 

[wlong01]

Doesn't the head crack cause both in both engines? Also, no class action settlement on the cracked heads for either motor.

That's because on the Turbo's Mazda has extended the warranty.

 

[chickdr]

That's because on the Turbo's Mazda has extended the warranty.

The extension is only for the valve seals. It doesn't cover a cracked head beyond 60k.