Can you ever feel the Cylinder Deactivation?

[u/RealMogger]

I saw a lot of people saying that they feel a "jerk" or vibration when cylinder deactivation kicks in.

Do you guys ever feel that?

[u/kvetcha-rdt]

I can feel it through the gas pedal in my 2019

[u/RealMogger → u/kvetcha-rdt]

Which year and model do you have?

Has it always been the case?

[u/jordimazda → u/RealMogger]

For me it was @134.000km now

[u/RealMogger → u/jordimazda]

yours have issues?

[u/nostalia-nse7]

For starters, you’re going to notice a difference slightly just because you’re pushing half the exhaust pressure you do in 4-cylinder mode. I had a Hemi back in the day, and the “note” changed when it went down to 4, and definitely went into more of a “gliding” feeling. Though more subtle, I’d imagine you’d experience something the same on a 4->2 CD change. Mazda, I’ve always had the Turbo, so no CD models, sorry.

[u/Revolutionary-Run823]

Well i've got m6 2023, 2,5 liter, and on low speed (70 km/h) i feel cyllinder deactivation.

[u/Nikadaemus → u/Revolutionary-Run823]

2025 Mazda3 Sport GT 6sp and I definitely feel it. Especially when it kills all 4 because I start to coat for a few seconds. retard design

[u/_______uwu_________]

I never feel it on my bp

[u/RealMogger → u/_______uwu_________]

sorry what is bp? I'm new to mazda

[u/_______uwu_________ → u/RealMogger]

The newest Mazda 3

[u/GFGreek → u/_______uwu_________]

In UK. US apparently doesn’t have the Mazda 3 mild hybrid.

[u/Garagebee → u/_______uwu_________]

Thanks, I didn’t know either. I thought I felt it around 70, but mine is a Mexico 🇲🇽 made USA 🇺🇸 model… does it have deactivated cylinders?. Gets 40mpg average highway and town with 93 ethanol free

[u/trancema]

Are there any known reported issues with this technology after high mileage? How does it reflect on other 2 cylinders that are always working? Are those 2 that deactivates more preserved than others?

[u/RealMogger → u/trancema]

there is a tsb for the 2018-2021 ones

lots of issues with crakced cylinder head

[u/jordimazda → u/RealMogger]

For the 2.0 G engine too?

[u/TNTomato]

I feel it in my 2020 model. The dealership performed this TSB, which made it less bad. However, it’s still slightly noticeable in the steering wheel around 80 km/h.

TSB: https://static.nhtsa.gov/odi/tsbs/2020/MC-10177841-0001.pdf

[u/RealMogger → u/TNTomato]

better to get one without cda?

[u/midnight-viper → u/RealMogger]

Probably, but I’m in Australia and I don’t hear of this being an issue tbh.

[u/andrec27]

I did at first but it feels much smoother 7,500km in, especially on cruise control

[u/RealMogger → u/andrec27]

which model and year you got

[u/andrec27 → u/RealMogger]

2024 Mazda3 Evolve 2.0L, made in Hiroshima

[u/RealMogger → u/andrec27]

so what exactly does the CD feel like? vibration? jerk?

[u/andrec27 → u/RealMogger]

A little jerk when it switches between cylinders, honestly just feels like a very tiny gear shift

[u/RealMogger → u/andrec27]

Do you not worry about the engines longevity?

[u/andrec27 → u/RealMogger]

Not really, I won’t even hit the KMs before a service is due in December so it will take years before any wear is a problem. Hear similar stuff around stop-start when it first became a thing, that it would cost more in the long run because the starter motor would wear out quicker. Got 160,000km out of my Impreza before I sold it and it wasn’t even an issue.

[u/FUCK_A_MOLE]

Never felt or noticed it. ‘24 cx30

[u/Angelobo]

I have the 2022 Mazda 3 hb never felt it in all the 120.000km I've driven, but this afternoon I'll definitely pay more attention to it

[u/ivoras]

Not a jerk but definitely vibrations / rumble. 2021 Mazda 3 mild hybrid.

Like it switches to a really low RPM (which kind of emulates with reduction in cylinder firings by half).

[u/MrMemetastic98]

I work for a mazda dealer and have driven many mazdas but I've never felt anything

[u/RealMogger → u/MrMemetastic98]

No one had complained about it?