Hello,
New to the forum and just bought my CX5 Select last week, it had 5 miles on it. I now have close to 400miles on it and today when I was driving into work the transmission made a small but noticeble thump. It was cold and I had only driven a mile so I though maybe I imagined it. Well I drove home for lunch. It is a 12 mile drive and was at the house for about 35 minutes, I was on the way back, at about mile five. I was coming off the entrance ramp to the Interstate behind an 18 wheeler. I slowed down, then accelerated to get around him and the transmission thumped again....this time much more pronounced and not a normal thump, a disturbing thump and a sound. I am 57 and this is only my second new car. The other was about 25 years ago, and it was a Mazda 626 that had AT issues from the start... I swore I'd never buy another, but the CX5 got such rave reviews I thought I'd be safe. Could it be a new car thing I know the computer takes awhile to learn things, or have I purchased another lemon?

Any help would be appreciated. I callled the dealer and left a message but know call back yet.

 

Well the obvious is because it is BRAND NEW take it to the dealer ASAP.

Unless you have a scan tool that you ca access your transmission function and operation and even then what are you going to be able to do? Maybe you are qualified as a Diagnostic auto tech IDK....

Don't worry Mazda will take care of it. BTW your transmission in your NEW MAZDA is nothing at all like any of your past vehicles transmissions.

 

Welcome to the forum

 

Ok thanks,

I called the dealer they said to call them if it did it again. I am not a diagnostic auto tech.... I am incredibly unlucky however. I read nothing but good things about the CX5. I do have a code checker and the transmission is not throwing any codes so there is that. I just wanted to know if anyone else has witnessed any similar issues. I found 2 accounts on other forums of 2022 CX5;s with a nearly Identical situation which both only occurred once or twice. I hope that is the case here but if it happens again, yes straight to the dealer. They are 45 miles out so I wanted some feedback before I went.

Thanks

 

Um didn't you tell me it did it again... No really I am sure you did!!!
Always go to the dealer and get it on record attached to your VIN history. That way it will not be a "but I called once".......

Forums are not the best place for technical information. I am aware of the other MAZDA forums. I belong to most all of them. I only participate helping members on this and one other Mazda related forum anymore. There are relatively very few like myself and on this forum grim reaper that are Certified Automotive Technicians. When I respond and end with ASE that indicates I am giving professional advise, recommendation's and established service procedures either All Data or OE when available.

Oh and unless you invested in a professional diagnostic scanner which most that can read the transmission start at about 2 grand and go up from there. It is more then simply looking for codes!

 

To give feedback from another member (and I'm almost certain there will be a snarky reply from Cali after my post...) in my 19 and 21 I have an occasional shift exactly like you describe. I chalk it up to the transmission being caught in the middle of a shift. You said "I was coming off the entrance ramp to the Interstate behind an 18 wheeler. I slowed down, then accelerated to get around him". The keywords to me are "slowed down, then accelerated". I suspect the transmission was downshifting as you slowed, then you punched it to get around the truck, and it needed to go to another gear quickly, which caused the thump. I have had situations like this in my '21 (and '19 before it) and also in my '20 Nissan Frontier which seem to occur if I slow down at a corner (at a Yield sign for example) and then if I accelerate quickly, it may thump on a downshift. Overall, I find the CX-5's 6-sp to be silky smooth and I think you will love your car.

I do agree with Cali though, go in and have the issue documented. Take a ride with a service tech and try to reproduce it for them. You could also test drive another '23 and see if you can get it to do the same thing.

 

Thanks to you both, I will call this morning and at least get it on record. My drive home yesterday and into work this morning was uneventful and I really do enjoy the CX5 I rented a Kia Sportage the week prior for a trip to NC from here in Champaign IL and the sportage was not bad, it was a new one 14 miles and fully loaded.... too loaded as the controls were overly complicated. The vehicle was similarly sized but not nearly so well laid out or appointed. Felt cheap in comparison. I am coming from a Subaru Impreza, which due to the Boxer engine configuration(low center of gravity) handles really well, plus I outfit it with sticky rubber. The Kia wallowed like a pig in corners even at alf the speed I would have put the Impreza through it. The CX5 takes similar curves straight up, No wallow, which is one of the reasons I bought it. Not that we have curves to deal with here in the flat lands lol but its nice know when I go home to NC through the WV Mountains, this car can deal with confidently

Thanks for the help both of you.

 

That is not how the Mazda Skyactiv transmission works mechanically or programmed in the ECU.
You can go to "Sport mode" and you examples should not happen.
Must also not have cruise on or active .

Truthornothing transmission is still in a break in period and it may simply be that the transmission like the engine needs more miles.
Reviewing my first transmission oil change can be an eye opener to how much none transmission fluid and also material being shed during the new first several thousand miles of operation. Also a good reason to do a pan filter and fluid service at much lower mileage then anyone has noted on forums.

 

To add it to your VIN it must be scanned at a dealership.

 

Not in "Sport" mode (I rarely if ever use Sport mode as it hangs too much on the revs for me). Also not with CC on (I don't use CC when driving on surface streets, only the highway).

I don't know what you mean by "this is not how the Mazda transmission works". It is a 6-sp auto. Nothing special about it. As I said this type of thump happens in my CX-5 (6-sp) and Frontier (9-sp) both of which have pretty standard automatic transmissions (i.e not a dual clutch). You can certainly get in a situation where the transmission makes a strange shift under certain conditions. I can predict when my Frontier will do it, but it still isn't every time I am in the situation. Others on this forum and the Nissan forums say the same thing about their cars with the same transmissions as mine. I see a lot more of the comments on the Nissan forums though. Nissan has had two programming updates to the TCM in the Frontier since its release in '20 and I have had theTCM updated on my '21 CX-5 as well. Both still do it at times.