How did you verify that? Welcome to the forum by the way.
Cylinder deactivation reliability, issues and how it works?
- Thread starter Kawzak
- Start date
With the 8th character in the VIN.
Well then it means he has a turbo which I didn't think they offered for 2026 according to the website, no? I can't see Mazda using a different 2.5 liter for the CX5 than the CX50. Now, if they did away with CD for this particular model then sign me up, I like the CX-50.
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Same motor for the CX-5 and CX-50. If the 8th character in the VIN is an "M", that motor has CD. If its a diff letter, it does not have CD. This applies to pre-2026 CX-5. The 2026 CX-5 has CD but it has a different engine programming so the 8th character is something other than an "M". Its an "L". The pre-2026 CX-5 engines without CD have an "A" as the 8th character in the VIN. Mazda turbo motors never had CD.
Ok, so, different coding and programming but still CD for both models regardless.
Not sure about the A engine code and I'm still new to Mazda being my 2025 is my first. But with my research, the 2024/25 engine codes for the non turbo are L and M. You're if the M code is in the VIN, it means the engine has iStop and CD. If the VIN has an L, then it does not have iStop and CD. My 2025 is an S Select which does not include iStop and CD hence the L engine code in my car's VIN...plus the absence of the iStop defeat push button and no CD monitoring as an option in the infotainment.
My understanding is eight spot in vin number L equals no CD, also no additional oil lines or solenoid at each end of the block.
My understanding is the Alabama plant that produces this model is using an out of speck window sticker template which has led to misinformation.
I had the sales manager and senior service tech check using information I sent from google co pilot to check, once they confirmed their findings I went to dealership and sent co pilot a photo of passenger side engine block and it confirmed no CD.
While researching I contacted several local dealerships and not one had relevant accurate information, which indicates to me lack of product knowledge and training focus merely on closing deals.
My understanding is the Alabama plant that produces this model is using an out of speck window sticker template which has led to misinformation.
I had the sales manager and senior service tech check using information I sent from google co pilot to check, once they confirmed their findings I went to dealership and sent co pilot a photo of passenger side engine block and it confirmed no CD.
While researching I contacted several local dealerships and not one had relevant accurate information, which indicates to me lack of product knowledge and training focus merely on closing deals.
It does not have a turbo
Not accurate, all of them have CD and i-stop. I have to manually turn off i-stop on the info screen every tine I start it up. Now, a time may cone when Mazda is short on the extra parts needed to add CD and those engines will have a different 8th digit letter. But an "A" is the new letter on the 2026 2.5L with updated programming including CD and i-stop.
To all
I’m too new to the brand to draw a line in the sand or knock a block off of anybody’s shoulder, at least not this topic.
I am confident that my 2026 cx50 preferred trim has neither CD or istop.
I did a reasonable amount of homework on that specific topic.
Thank you for all the input
I’m too new to the brand to draw a line in the sand or knock a block off of anybody’s shoulder, at least not this topic.
I am confident that my 2026 cx50 preferred trim has neither CD or istop.
I did a reasonable amount of homework on that specific topic.
Thank you for all the input
What was your actual homework? There's a easy way to tell - just go into the infotainement screens and look for the CD representation. Shows how many cylinders are working.
L code in vin number, physically looking at the engine comparing it against Mazda reference showing with and without, send photo of actual engine to google co pilot, dealership senior service tech inspection.
I’ve driven vehicles with istop and it definitely doesn’t have that.
I’ve looked for so many confirmations that I forgot if I checked the information screen but I certainly will
-I was told 2024 on they can't get into ecm to make those changes....maybe a mazda tech can though
as far as letting maintenance minder go past due-of course if you have issues the dealer can see that so.....coin toss...i may just pull oil control solenoid wiring harness for 1/4 and go that route
You're in the CX-5 forum not the CX-50. So all discussions here will be specifically on the CX-5. From my limited knowledge, the 2026 CX-50 carries over from the 2025 with incremental changes but the foundation of the platform remains unchanged. So the powerplant options would remain the same.
From what I'm seeing with your posts, the CX-50 had the same feature situation as the 2025 CX-5. It seems the trim level up to the Preferred got the L engine for the CX-50. For the 2025 CX-5 it was base and Select which got the L engine. Preferred trim and up got the M engine.
And to throw things for a loop and muddy the waters some. There are some higher trim 2024 CX-5 models that should have the M engine but got the L engine due to supply chain issues. Many people were seeking out those unicorns because of the nonstandard engine/trim combination.
Hey, regardless. It's a good conversation no matter where it's at and I'm glad this came up again. Seems to be a lot of confusion regarding CD on the newer models and the sales people don't seem to have a clue as to what's what, which I find quite annoying considering the amount of money being dropped. I have an interest in the CX-50. It's the same 2.5 liter no matter what model it's in.
AI answer from 2 search engines:
and:
Copilot
Short answer:
According to Mazda’s 2026 CX‑50 specification data:
You may see conflicting info online because:
If you want, tell me the exact trim you’re considering and I’ll confirm 100% whether that specific one has it.
Cylinder Deactivation in the 2026 Mazda CX-50
No, the 2026 Mazda CX-50 does not have cylinder deactivation. This feature has been eliminated for the 2026 model year, meaning that all models will operate without this technology.Overview of Engine Options
The 2026 Mazda CX-50 offers several engine configurations, but none include cylinder deactivation:| Engine Type | Description | Power Output |
|---|---|---|
| Non-Turbo | SKYACTIV-G® 2.5L 4-cylinder | 187 hp |
| Turbo | SKYACTIV-G® 2.5 Turbo engine | Up to 256 hp |
| Hybrid | 2.5L 4-cylinder Hybrid engine | 176 hp |
Key Features of the 2026 Mazda CX-50
- Performance: The CX-50 is designed for confident traction and responsive handling.
- All-Wheel Drive: Available i-ACTIV All-Wheel Drive enhances control in various conditions.
- Safety: Equipped with advanced safety features, including Blind Spot Monitoring and Lane Keep Assist.
and:
Copilot
Short answer:
Some 2026 CX‑50 models (non‑turbo 2.5L gas): Yes, they have cylinder deactivation
Turbo models: No cylinder deactivation- Hybrid models: No (they use full engine on/off instead)
Details
According to Mazda’s 2026 CX‑50 specification data:- The standard 2.5L naturally aspirated SKYACTIV‑G engine does include cylinder deactivation (CDA). [filecache....iaroom.com]
- The turbocharged 2.5L engine does NOT list cylinder deactivation (Mazda typically omits CDA on turbo engines). [filecache....iaroom.com], [youtube.com]
- The new hybrid models don’t use cylinder deactivation at all, since they shut the engine off entirely when possible instead of deactivating cylinders. [cx50forums.com]
Why there’s confusion
You may see conflicting info online because:- Mazda has been inconsistent about CDA across years and trims
- Some earlier CX‑50 trims (or certain VIN builds) didn’t have it
- There are rumors/speculation that Mazda is phasing it out on some newer engines
Bottom line
- If you’re looking at a 2026 CX‑50 2.5 S (non‑turbo) → Yes, it likely has cylinder deactivation
- If you want to avoid it → go with:
- Turbo model, or
- Hybrid
If you want, tell me the exact trim you’re considering and I’ll confirm 100% whether that specific one has it.
