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Discussion Starter · #1 ·
Hi all

I am new to this forum and have a CX 30 that is two months old. Its been making a noise after driving it for about 30 minutes - the noise is difficult to describe but a cross between a groan and a squeak! Anyway I finally took it back to the dealership and I am told it needs a new Supercharger which needs to be shipped from Japan. Has anyone else had a similar problem - I am concerned that replacing the part may not fix the problem. Mine is the 2litre AWD model

thanks all
 

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PAST OWNER OF A AWD 2020 GT CX-30 ceramic coated-curently have a 100th Anniversary edition mazda 3
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Hmm must be a few quirks to fix on the new skyactiv X engine, here in Canada and us it's people having a vibration issues with the 2.5 G engine with cylinder deactivation. Hope these issues get worked out in a reasonable timely manner.
 

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Yeah , they have figured a cure for c.d. vibration in future models. They have dropped C.D. across the model line for '21, at least that is what I am hearing over on the 3 forum. Like my Golf before it, and for the same reasons, I will not keep this 3 past the factory warranty.

Mazda has taken big steps backward reliability wise with both SKY X and C.D. We are in luck in N.A. not to be saddled with the feeble, expensive complex X vs the 2.5.
Had I known about all the horror stories regarding C.D. , I would have been careful to avoid a model with it, even though it has not been a problem in my first 5000 miles.
 

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PAST OWNER OF A AWD 2020 GT CX-30 ceramic coated-curently have a 100th Anniversary edition mazda 3
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Yeah , they have figured a cure for c.d. vibration in future models. They have dropped C.D. across the model line for '21, at least that is what I am hearing over on the 3 forum. Thank goodness I tend to trade ever 2 or 3 years. Like my Golf before it, and for the same reasons, I will not keep this 3 past the factory warranty.

Mazda has taken big steps backward reliability wise with both SKY X and C.D.
Lol I'm right behind you ! I leased my CX 30 and I think leasing now days is a very good idea as with the Nissan Qashqai I had I learnt the hard way and lost money as it was going to be 3 years old in a year and was in the shop like 25 times for warranty work lol I wasn't keeping that thing any more so im not worried about my CX 30 with cylinder deactivation and I'm enjoying driving it and looking forward to the next lease in 3 years with turbo in the next CX 30.
 

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Somehow I missed the fact the US Premium model had CD prior to purchase. It really surprises me that someone thinks an 180+ hp 4 cyl could get by running on 2 cylinders.
I have seen on Honda forums their V6 engines with CD can be tricked into not activating. Maybe something similar can be done on the 2.5.
 

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Your car doesn't need to be " tricked" into avoiding activation of the CD system. Mazda, simply needs to issue a software update.
 

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PAST OWNER OF A AWD 2020 GT CX-30 ceramic coated-curently have a 100th Anniversary edition mazda 3
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Your car doesn't need to be " tricked" into avoiding activation of the CD system. Mazda, simply needs to issue a software update.
People now days seem to forget that an entire vehicle is run by a computer.. as I keep saying software update can really make a huge difference on how the vehicle runs and operates.
 

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Hello all,
Colin I have the 2WD CX30 SkyactiveX manual model - bought in March just before 'lockdown' and have completed just over 1000 miles. I am experiencing the same noise as you describe (generally kicks in after approx half hour motoring) and then persists each time when accelerating. Yesterday was only the fourth journey extending over the half hour. Whilst in the first three such journeys the noise disappeared as the car dropped to slower speeds, yesterday it did not. In fact on the return leg the noise surfaced after about 10 minutes motoring. It would appear the noise is becoming more concentrated as the mileage increases.
The car has been back to my dealer twice and on Tuesday (8/9/20) the workshop have now also heard the noise, had a reply from Mazda UK confirming it is the supercharger that is related to the Hybrid Battery recharge system. Apparently I just have to 'enjoy' it as 'no further action required'. - the noise comes with the car. No mention has been made of replacing the supercharger. In fairness to my dealer they have indicated as long as I choose another Mazda they will try and help.
The problem I have there is the CX30 is a lovely car and is the only model that fulfils what I was looking for (almost love at first sight !!) - I have been led to believe the noise will occur on any Mazda engine featuring the M-Hybrid system.
I will feed back on how this 'problem' progresses
 

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CX-30 G122 AT Comfort Machine Grey
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Mazda EU has issued an info bulletin in Nov 2019 (reworked in Dec) (ref. E028/19) to their dealer there are three possible "normal" noises coming from the X-engine supercharger or related SPCCI technology to take away concerns by customers. I have attached that one, however it is in German. There is nothing mentioned about any M-Hybrid related noises, which would indicate that also the G-engine could be affected. I have not read on any CX-30/Mazda 3 related forum about those noises with the G-engine. My guess is it's BS, I am not hearing anything remotely similar coming from my car comparing the noise samples posted. As I posted and linked above there is an now 18 pages long topic on a German CX-30 Forum where owners have posted that Mazda Germany have acknowledged and approved compressor replacements because of those noises. Apparently there is a reworked compressor now. Mazda has an European R&D department in Germany, I assume the German Mazda organization is much better informed than Mazda UK.
 

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Discussion Starter · #13 ·
Hello all,
Colin I have the 2WD CX30 SkyactiveX manual model - bought in March just before 'lockdown' and have completed just over 1000 miles. I am experiencing the same noise as you describe (generally kicks in after approx half hour motoring) and then persists each time when accelerating. Yesterday was only the fourth journey extending over the half hour. Whilst in the first three such journeys the noise disappeared as the car dropped to slower speeds, yesterday it did not. In fact on the return leg the noise surfaced after about 10 minutes motoring. It would appear the noise is becoming more concentrated as the mileage increases.
The car has been back to my dealer twice and on Tuesday (8/9/20) the workshop have now also heard the noise, had a reply from Mazda UK confirming it is the supercharger that is related to the Hybrid Battery recharge system. Apparently I just have to 'enjoy' it as 'no further action required'. - the noise comes with the car. No mention has been made of replacing the supercharger. In fairness to my dealer they have indicated as long as I choose another Mazda they will try and help.
The problem I have there is the CX30 is a lovely car and is the only model that fulfils what I was looking for (almost love at first sight !!) - I have been led to believe the noise will occur on any Mazda engine featuring the M-Hybrid system.
I will feed back on how this 'problem' progresses
Thanks Nigel.. I am still waiting on news from Mazda of the arrival of a new Supercharger (whatever that does) but I have said that if the noise carries on I want a refund as there is clearly a design fault here. I dont think you should accept that the noise is acceptable. I doubt Mazda will want lots of unfavourable publicity on this issue!
 

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Discussion Starter · #14 ·
Mazda EU has issued an info bulletin in Nov 2019 (reworked in Dec) (ref. E028/19) to their dealer there are three possible "normal" noises coming from the X-engine supercharger or related SPCCI technology to take away concerns by customers. I have attached that one, however it is in German. There is nothing mentioned about any M-Hybrid related noises, which would indicate that also the G-engine could be affected. I have not read on any CX-30/Mazda 3 related forum about those noises with the G-engine. My guess is it's BS, I am not hearing anything remotely similar coming from my car comparing the noise samples posted. As I posted and linked above there is an now 18 pages long topic on a German CX-30 Forum where owners have posted that Mazda Germany have acknowledged and approved compressor replacements because of those noises. Apparently there is a reworked compressor now. Mazda has an European R&D department in Germany, I assume the German Mazda organization is much better informed than Mazda UK.
thank you for posting this
 

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Any updates on this issue? I love this car with this engine, it's just perfect for my family. I don't want a big car like CX-5, I don't want turbo but i want an efficient engine with fantastic fuel consumption. However now I'm concerned about reliability. Manual transmission is awesome. I have no idea what to buy. Toyota RAV4 is to big, ugly, Honda have dilution problem on 1.5 turbo, hyundai, kia DCT, turbo etc, european ones are expensive and with many other problems. If the supercharger has design flaws then it's a big problem if there are only some bad parts, bad series they can be fixed easily.
 

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Discussion Starter · #16 ·
Any updates on this issue? I love this car with this engine, it's just perfect for my family. I don't want a big car like CX-5, I don't want turbo but i want an efficient engine with fantastic fuel consumption. However now I'm concerned about reliability. Manual transmission is awesome. I have no idea what to buy. Toyota RAV4 is to big, ugly, Honda have dilution problem on 1.5 turbo, hyundai, kia DCT, turbo etc, european ones are expensive and with many other problems. If the supercharger has design flaws then it's a big problem if there are only some bad parts, bad series they can be fixed easily.
Still waiting for the part to arrive 😪

In the meantime I have a Toyota CHR to drive courtesy of the dealer. Cabin is horrid to be honest. Please fix my CX 30 asap
 

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Still waiting for the part to arrive 😪

In the meantime I have a Toyota CHR to drive courtesy of the dealer. Cabin is horrid to be honest. Please fix my CX 30 asap
That's the thing. There may be issues with the new Mazda's, but my God is driving it better and quieter then the competition. I compare Toyota's to a well built appliance. They may work well and last a long time, but they are just an appliance for getting from A to B. Obviously there are exceptions to this, but still
 

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This problem is afflicting my CX-30 too. 1400 miles, 3 months old. Skyactive X AWD Auto. Identical groaning noise when fully warmed, coinciding with throttle opening, as others have reported.

The Mazda Austria Service Bulletin E028/19 published Nov 27 2019 mentioned above translates as follows:

“Re:: MAZDA3 (BP) and CX-30 (DM) - Normal operating noises from the engine compartment. With this service information we would like to inform you about some normal operating noises that may be noticed by the customer or technician. These are not production errors, but typical features of the SKYACTIV-X motor. These noises cannot be eliminated by a repair.

1. Compressor noise may be heard when accelerating. Cause: Noise development in the compressor due to torque fluctuations.
2. A beep may be heard while the engine is running without the engine cover. Cause: Blow-by gas for the compressor can cause this beep on the shut-off valve (air intake system).
3. When the accelerator pedal is fully depressed to the end position, a knocking noise may be heard from the engine. Cause: The knocking noise can be caused by the lean combustion at high compression pressure, which with SPCCI technology is comparable to combustion in a diesel engine. The noise is a characteristic feature of the SKYACTIV-X engine and occurs due to the high efficiency of the combustion with the SPCCI technology.”


Needless to say, the groaning noise characterised by Colin UK, Nigel UK, many German owners and now me, does not fit with any of these 'normal' noises. I will report back on my progress in resolving this. I am concerned that this fault may be a precursor to later engine damage, given that this engine depends on high volumes of air being delivered at precisely the correct time, by the supercharger (or compressor, as in German).
 

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Any update? Thanks.
Was diagnosed last week as a supercharger issue, and replacement authorised by Mazda. Fortunately they are in stock in UK. Awaiting part and date to have it fitted, could be a few weeks (we are in lockdown again here). Will report when done. This was the first CX30 which the dealer had encountered with this issue.

The reasons I bought it were because the dealer is excellent, and Mazda were excellent supporting my previous CX3. So far justified. The theory behind the Skyactive X engine is compelling. All these more complex engines will have teething problems....the VW Group ACT cylinder deactivation vibration for example.
 
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