Feel slight vibration in gas and brake pedal when AC is on

[bizkitgto]

Hello everyone,

I am just wondering if anyone else has this issue. I have a 2023 Mazda CX5 Select. I can feel a slight vibration when travelling at slow speeds, and when stopped when I have some load on either the brake or accelerator pedal. I don't have to have the pedal pressed all the way, but I can feel some vibration, although it is very slight. I have found the vibration is only there when the Air Conditioning is on. Has anyone else noticed this? Is this something normal or a known issue, or is something wrong with the A/C compressor or engine?

Cheers,

Biz

 

[N7turbo]

I have also noticed that the idle dips low when the A/C compressor cycles on, and have seen several others mention the same, so it's not just your car.

 

[bizkitgto]

I have also noticed that the idle dips low when the A/C compressor cycles on, and have seen several others mention the same, so it's not just your car.

Do you feel the vibration in your brake pedal (or accelerator pedal)?

 

[erhayes]

I do

 

[bizkitgto]

I do

How bad are the vibrations? And do you feel them on both the brake and gas pedal?

Have you taken to dealer, or done anything to remedy the situation? I am not sure if this is normal, or some kind of malfunction that can lead to more damage down the road

 

[jadmt]

I think it is normal..my 2023 does it..rev it a little and it stops.

 

[wlong01]

Sounds like normal compressor on/off.

 

[cz5gt]

up until 2025 models, Mazda uses a non variable AC compressor.

"Normal operation of a car's AC compressor might involve a slight shudder or shaking, particularly noticeable at idle, as the compressor engages and places an additional load on the engine
. This is because the AC compressor, essentially acting as a miniature engine, requires power from the car's engine. When the compressor kicks in, the engine's idle speed may drop momentarily, resulting in a slight vibration"

The topic has been discussed before if the OP is interested:

C

Thread '2016 CX-5 AC compressor cycles every 5 seconds?'

Feb 10, 2024

Dear Mazda forum members,

Need your help again please.

Noticed this on my Mazda CX-5 2016 GT , with AC on set at 18C , the car will vibrate every 5 seconds, can feel it when I am sitting at the lights , vibration through the brake pedal . Turns out the AC compressors is cycling on/off but it only happens when AC set to recirculate.

When the AC is set to take in outside air , the compressor stays on.

Is this normal? Video attached.

• cdmain
• Replies: 20
• Forum: CX-5 General

 

[bizkitgto]

up until 2025 models, Mazda uses a non variable AC compressor.

"Normal operation of a car's AC compressor might involve a slight shudder or shaking, particularly noticeable at idle, as the compressor engages and places an additional load on the engine
. This is because the AC compressor, essentially acting as a miniature engine, requires power from the car's engine. When the compressor kicks in, the engine's idle speed may drop momentarily, resulting in a slight vibration"

The topic has been discussed before if the OP is interested:

C

Thread '2016 CX-5 AC compressor cycles every 5 seconds?'

Feb 10, 2024

Dear Mazda forum members,

Need your help again please.

Noticed this on my Mazda CX-5 2016 GT , with AC on set at 18C , the car will vibrate every 5 seconds, can feel it when I am sitting at the lights , vibration through the brake pedal . Turns out the AC compressors is cycling on/off but it only happens when AC set to recirculate.

When the AC is set to take in outside air , the compressor stays on.

Is this normal? Video attached.

• cdmain
• Replies: 20
• Forum: CX-5 General

Wow, thank-you very much!

 

[paris1]

"up until 2025 models, Mazda uses a non variable AC compressor"

So how does an variable compressor differ in operation?

 

[RedBaron]

"up until 2025 models, Mazda uses a non variable AC compressor"

So how does an variable compressor differ in operation?

Well, it varies.

(Sorry, couldn't resist )

 

[cz5gt]

"up until 2025 models, Mazda uses a non variable AC compressor"

So how does an variable compressor differ in operation?

In car air conditioning systems, a non-variable (or fixed displacement) compressor runs at a constant speed, either fully on or off, while a variable displacement compressor can adjust its output to match the cooling demand, offering greater efficiency and more consistent temperature control