[Polymetal Gray]

I believe the "issues" are limited to a few customers. 130 000 km here and absolutely flawless CD operation

 

[CcycleK]

Thanks for the reads and the response.

I like to know things before I commit to big purchases.

Please post when some news is out there about 'software fixes' for the CD issue.

My take is that the "software fix" in my case is just going to increase the rpm or decrease the engine load that triggers going to 2 cylinders so there is more of a gap between that and when it decides it "needs" 4 so it latches instead of cycles.

I don't have much hope the software is going to fix the roughness.

 

[MadDad]

MadDad:

Between my wife and I (and now our youngest daughter), we have owned several Mazdas...and I'm looking to buy another.

About six months ago, while visiting San Diego, we rented a 2023 CX30 Carbon Edition for one week.

What a vehicle! We are not tall or wide people...and our kids are grown, so the tiny back seat etc is not a problem for us. I loved it.

When it comes time for us to buy, the CX30 will be at or near the top of our list.

In what would best be called a week of suburban-type driving, I don't remember feeling or perceiving any of the problems you describe with cylinder deactivation (CD).

But if I did, in a CX30 that I purchased for myself, I would be as irritated as you are now.

I've tried to read a bit about this problem.

Can you speak to the following:

1. In your opinion, is the CD problem worse with some individual CX30s and not so obvious in other CX30s?

2. Explain how you would test-drive a new CX30 to ascertain whether or not that particular vehicle suffered from the CD problem.

Thanks.

1- The CD roughness problem is only in certain cars. We test drove other CX30s last year, each had a few thousand miles on it, none felt like this one. Well, we probably tried only three from the dealer, none were as rough as ours. One had some noticeable feeling of roughness, others were basically smooth. There are many people on this forum reporting no noticeable symptoms, and I believe them. My wife has been driving a 22 CX5 for 3 years/ 38,000 miles, bought new, it has CD, it is very smooth. Our CX30 lurches in and out of CD so harshly you can actually see the headlight beams move down and up with the changes. These changes are quick in both direction, like flipping a switch. It's like going back to when a lot of us were young, our poor beat up cars would respond poorly when the air conditioning compressor would kick in and out.

2- Drive the car normally. But don't let the salesweasel crank up the air conditioning or the music. Have the engine load undisturbed by AC. Keep the sound down so you can listen for changes in engine tone, as some here have reported. Probably the best condition to feel it is in easy going driving. Flat, steady, not windy, 40 to 50 MPH is where ours is most noticeably observed and keeps switching 4-2-4-2-4 over and over. Not continuously, it stays for some seconds in each, but not very long. But the CD goofiness continues up into full highway speed.

What is scary to me, and why I may never trust another Mazda with CD, is that we gave this car a very thorough test run. I warned my daughter that in my day the sales process was four right turns and sign here, so we did not do that. We went probably 20 minutes/10 miles on 40 MPH road, local streets, and full tilt Interstate highway. The car drove wonderfully.

We bought it, my daughter took it home. All good. A few days later she calls me quite disturbed. The car was now not traveling smoothly. Had slightly over 300 miles. Call dealer, they look at it the next day, checking for engine operation, transmission trouble, loose engine mounts, etc. They find nothing, tell her its normal, send her home.

I get online, start looking, find complaints about CD problems. Last I had read these had no CD, part of why I recommended to her to get one of these. Take it back a few days later, dealer now playing dumb. "It has CD. Well, that shouldn't make a difference." I tell them to google complaints about the first generation of CD they had, then cancelled, a few years ago.



So, in our case the roughness started after about 300 miles. I will absolutely guarantee it was not doing it up to that point. Our dealer actually has posted a 300 mile return policy if customer is unsatisfied. We had about 360 when we took it in, asked about an exchange for a different car. "no, too late" This is where the fun began.

Based on our experience, I will say there is no confidence the car that leaves the dealer working properly will continue to do so.

A low mile late model trade in, very thoroughly tested, at a fair price, and with full remaining or extended warranty, might be the safest choice.

Enough rambling on my part. Feel free to pose more questions, I want to help others from getting pulled into something like this.

 

[MadDad]

MadDad:

Between my wife and I (and now our youngest daughter), we have owned several Mazdas...and I'm looking to buy another.

About six months ago, while visiting San Diego, we rented a 2023 CX30 Carbon Edition for one week.

What a vehicle! We are not tall or wide people...and our kids are grown, so the tiny back seat etc is not a problem for us. I loved it.

When it comes time for us to buy, the CX30 will be at or near the top of our list.

In what would best be called a week of suburban-type driving, I don't remember feeling or perceiving any of the problems you describe with cylinder deactivation (CD).

But if I did, in a CX30 that I purchased for myself, I would be as irritated as you are now.

I've tried to read a bit about this problem.

Can you speak to the following:

1. In your opinion, is the CD problem worse with some individual CX30s and not so obvious in other CX30s?

2. Explain how you would test-drive a new CX30 to ascertain whether or not that particular vehicle suffered from the CD problem.

Thanks.

Let me add another thing to be wary of. My daughter was waiting for the dealer to get this exact configuration of car in, it is exactly what she wants. They call, it's here, if you want it get in here, these Carbon Editions go fast. We get to dealership that afternoon, I tell daughter we will give it a really good look over. Drive it some, are we crazy, keep trying to figure out what is weird. Turns out an area in the windshield directly in front of driver has bad glass, causing a lens effect as your eyes pass across it. Major brain bender, no way acceptable once we figure it out. Point out to management. First disbelief, then they see it themselves, so their offer: Buy the car, they will have glass truck come and change the windshield glass. No, we are not buying a brand new car that just had Goober and Ralph redo the glass. So we are ready to leave, store manager comes out, to let us know they actually had received TWO of that model, so we tested the second one, then bought it.

So, of those two identical cars, both came bearing problems. Not very confidence inspiring.

 

[ndrgd57]

Let me add another thing to be wary of. My daughter was waiting for the dealer to get this exact configuration of car in, it is exactly what she wants. They call, it's here, if you want it get in here, these Carbon Editions go fast. We get to dealership that afternoon, I tell daughter we will give it a really good look over. Drive it some, are we crazy, keep trying to figure out what is weird. Turns out an area in the windshield directly in front of driver has bad glass, causing a lens effect as your eyes pass across it. Major brain bender, no way acceptable once we figure it out. Point out to management. First disbelief, then they see it themselves, so their offer: Buy the car, they will have glass truck come and change the windshield glass. No, we are not buying a brand new car that just had Goober and Ralph redo the glass. So we are ready to leave, store manager comes out, to let us know they actually had received TWO of that model, so we tested the second one, then bought it.

So, of those two identical cars, both came bearing problems. Not very confidence inspiring.

Heard about those glass problems, makes a person wonder what kind of quality control is happening at Mazda 😬

 

[josephandrews222]

MadDad:

You write well.

Thanks so much. Really.

 

[josephandrews222]

Let me add another thing to be wary of. My daughter was waiting for the dealer to get this exact configuration of car in, it is exactly what she wants. They call, it's here, if you want it get in here, these Carbon Editions go fast. We get to dealership that afternoon, I tell daughter we will give it a really good look over. Drive it some, are we crazy, keep trying to figure out what is weird. Turns out an area in the windshield directly in front of driver has bad glass, causing a lens effect as your eyes pass across it. Major brain bender, no way acceptable once we figure it out. Point out to management. First disbelief, then they see it themselves, so their offer: Buy the car, they will have glass truck come and change the windshield glass. No, we are not buying a brand new car that just had Goober and Ralph redo the glass. So we are ready to leave, store manager comes out, to let us know they actually had received TWO of that model, so we tested the second one, then bought it.

So, of those two identical cars, both came bearing problems. Not very confidence inspiring.

My oh my what a pissy dealership experience.

Unfortunately: been there--done that.

 

[TronG]

Did they ever fix it? I have the same problem. I got new tires and just got the rebalanced at mazda. I got an alignment and it still shakes. Going back to the dealer friday.

It's at the dealer again. My 2022 doesn't have cd. It's something else. Dealer ruled out tires and alignment. Get this the loaner they gave me does the same thing.

 

[msgfrommelissa]

After reading this topic, what comes to mind is a possible safety issue when moving to and from 2 and 4 cylinders. Do those of you that have this problem perceive an issue during passing, etc when the transfer of cylinders occurs? I have a '21 CX 30 without CD so I am foreign to this CD scenario.

I've had no issues with mine

 

[SDH]

I've had no issues with mine

Even if you have no problem with it, it shortens the problem-free operating life of the engine. Same with having a turbo engine for that matter. But, that's a problem for someone else down the road (same with higher-interval oil changes & no proper interval transmission fluid services) if you don't keep vehicles longer-term.

 

[TalkingMazda]

I'm on a 2025 CX30, purchased two weeks ago. I feel vibrations, especially in the floor to my left leg when the speed is between 45-55 mph with low rpm. Happens when CD is activated on the screen. The vibrations numbed my foot last week on my drive home from work.
Why can't we disable this nonsense?

 

[CcycleK]

I'm on a 2025 CX30, purchased two weeks ago. I feel vibrations, especially in the floor to my left leg when the speed is between 45-55 mph with low rpm. Happens when CD is activated on the screen. The vibrations numbed my foot last week on my drive home from work.
Why can't we disable this nonsense?

I wish they would at least step up on the ones that exhibit worse than normal cylinder transitions to try redoing the valve seals maybe springs and HLAs or something. At least they pulled and inspected the solenoids last time.
I'm not sure what the physical difference between the CX-5 and CX-30 is. Supposed to be same engine but makes more HP.
There is definitely a "slightly detectable change" on the loaner I had vs those of us where it feels like hitting a tire cap in the road or having the car shudder for part of a second. Or where it is so bad that it immediately kicks the car back to 4 cylinders.

 

[MadDad]

Welcome to the forum. It's a terrible thing that you joined for this problem. How Mazda can continue to sell these nightmare machines to a trusting public boggles my mind.

Have you been reading the long threads here detailing what we have been going through?

 

[CcycleK]

I'm on a 2025 CX30, purchased two weeks ago. I feel vibrations, especially in the floor to my left leg when the speed is between 45-55 mph with low rpm. Happens when CD is activated on the screen. The vibrations numbed my foot last week on my drive home from work.
Why can't we disable this nonsense?

Any chance the dealership has a return policy? It beats trying to the service department to do anything outside of the Mazda script then fighting for a repurchase through BBB National Programs, lemon law, or working with Mazda Customer Experience.

 

[TalkingMazda]

Any chance the dealership has a return policy?

unfortunately not

 

[TalkingMazda]

Welcome to the forum. It's a terrible thing that you joined for this problem. How Mazda can continue to sell these nightmare machines to a trusting public boggles my mind.

Have you been reading the long threads here detailing what we have been going through?

yes. I drove a 40-minute trip this weekend on highway (70+) and there were no noticeable vibrations. However, my commute to work in which I drive 45-55, I notice it and it coincides with the CD on screen.

 

[MadDad]

I'm on a 2025 CX30, purchased two weeks ago. I feel vibrations, especially in the floor to my left leg when the speed is between 45-55 mph with low rpm. Happens when CD is activated on the screen. The vibrations numbed my foot last week on my drive home from work.
Why can't we disable this nonsense?

How many miles did you put on it before it started the roughness, or do you think it was doing it right away? Ours, it absolutely worked smoothly under all conditions for the first 300 miles or so, then it started the roughness. Ours is so obvious we would have felt it test driving and that's where the monkey business would have stopped.

 

[MadDad]

TalkingMazda, where is your CX30 built, Mexico or Japan?

 

[JDC]

I've purposely avoided finding the cylinder deactivation graphic because having that representation staring at me would only increase any anxiety I have about the system. I've said that, before before committing to a purchase, I researched many vehicle makes and models. None "ticked all the boxes" for me. The main sticking points for me, were cars with their own versions of I-Stop, cylinder deactivation, NA engines and CVT transmissions. When I discovered that my 2024 CX-30 was not equipped with I-Stop (thank goodness) I figured that 3 out of the 4 things I definitely did not want was the closest I was going to get (unless I went for a turbo version of some brand). All that said, I'm still waiting for someone to come up with a bypass for the CD system.

 

[Islandvol]

Doesnt sport mode deactivate it?