Mazda Turbo reliability?

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Bay Area, CA
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CX50 PPT PMG/T
I have never owned a turbo car. I drove test a turbo CX-50. As for repairs, how long do turbos last on Mazdas before needing any repairs?
 
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Mazda CX-9 Signature
I don't recall anyone on this forum have reported issues with the turbo. Most common issue is the actual block cracking but I'm not sure if Mazda made any changes to the 2.5T in the cx-50. Generally speaking, modern turbo system can easily go 100k+. They are a lot more reliable than the old systems
 

sm1ke

Work In Progress..
Moderator
Contributor
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Canada
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'18 CX-9 Signature
As @Silly Wabbit suggested, I think the actual turbos seem to be very reliable. The engines that the turbos are mated to have had some concerns though. Some newer engines may burn some oil, while older ones may develop cracks in the cylinder head, leading to a coolant leak. It's important to keep in mind that the vast majority of these engines are perfectly fine, and only a few of them ever experience any issues. But it's definitely good to know about them, just in case.
 
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2014 & 2019 CX-5 Touring(s)
2 channels. 1 for quicker boost at low rpm, then it opens to a higher flow channel. Think of it like your thumb on the water hose to build that pressure quickly.
Sorry, but not quite.

Twin scrolls means two channels in the exhaust manifold and turbine scroll such that the exhaust pulses from separate piston pairs are kept separate to stop them interfering with each other and so improve the power to the turbine.

Twinscroll-Turbos-07.jpg
 
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2014 & 2019 CX-5 Touring(s)
Start at 1:10

Ahhh, well that's interesting. But that video says Mazda is using a 4-3-1 exhaust, which is then NOT dual-scroll!

After looking further, I saw this: Mazda’s Dynamic Pressure Turbo Explained. As it says in there:
"By separating the exhaust into three pathways, the turbocharger is hit with more evenly metered pulses, like a twin-scroll turbo."

So, again, it's not actually a twin/dual scroll.
 
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sm1ke

Work In Progress..
Moderator
Contributor
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Canada
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'18 CX-9 Signature
So to clear up the confusion, the turbo in every Mazda 2.5T is a Dynamic Pressure Turbo, aside from the CX-50. On the CX-50, the turbo is a twin-scroll design. If you use the Mazda Build and Price tool, you'll see that only the CX-50's Turbo is described as a Twin-scroll Turbo, everything else is a DPT.

Why they made the change, I don't know.
 
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2014 & 2019 CX-5 Touring(s)
So to clear up the confusion, the turbo in every Mazda 2.5T is a Dynamic Pressure Turbo, aside from the CX-50. On the CX-50, the turbo is a twin-scroll design. If you use the Mazda Build and Price tool, you'll see that only the CX-50's Turbo is described as a Twin-scroll Turbo, everything else is a DPT.

Why they made the change, I don't know.
Now THAT's really interesting. Since that's the newest model I assume all the future 2.5T engines will come like that. Maybe a cost reduction factor again (or reliability, or??)
 
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2018 CX-9 GT
I assume this is the marketing department getting it wrong, but it would be interesting if they would have changed the design.
 
I assume this is the marketing department getting it wrong, but it would be interesting if they would have changed the design.
Mazda uses a new turbo for the CX-50 that is a twin scroll that no longer uses the dynamic pressure system.
 

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2018 CX-9 GT
Interesting, i see it still has the 4-3 exhaust scavenging set-up. It would be interesting to see how it feeds into the turbo. Also quite surprised the power delivery would be identical with the old and new set-up. I am surprised no one mentioned any differences yet.
 
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2014 & 2019 CX-5 Touring(s)
Interesting, i see it still has the 4-3 exhaust scavenging set-up. It would be interesting to see how it feeds into the turbo. Also quite surprised the power delivery would be identical with the old and new set-up. I am surprised no one mentioned any differences yet.

I think those diagrams are of the dynamic pressure system, not twin scroll.
 
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2014 & 2019 CX-5 Touring(s)
Ahh, OK, I stand corrected. Like youri I was confused by the 3 outlet manifold. Then I guess cyls 2 & 3 are merged upstream, and 1 & 2 merged in the turbo housing.