I am loving my new 2023 CX-5 Turbo. I’m at 1,800 miles now and so far I have been very satisfied with making the jump to Mazda. However, there is a slight buzzing like sound, almost a super fast click, that is coming from the engine bay somewhere. It changes speed and pitch with the engine, so it is coming from something that is being driven by the motor. I’m not sure if it is some sort of pump, or pulley, or something of the sort. It is pretty faint, but seems to be a little louder than when I first heard it. It could be something perfectly normal, but I thought I would run it by the folks on here before pointing it out to the dealer. It’s definitely not the tranny but it is similar in sound to a tranny whine.
Buzzing sound 2023 CX-5
- Thread starter jofo67
- Start date
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- Mazda CX-9 Signature
The injectors maybe?
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- Canada
These threads may be related to the issue you're having.
mazdas247.com
mazdas247.com
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New CX-5, high pitched whine at 80 km/h (50 mph)
I recently bought a 2021.5 CX-5 GS AWD. When driving on secondary highways, I noticed a high pitched whine when the vehicle was going at 80 km/h (50 mph). The sound is distinct but is not particularly loud, i.e. you can't really hear it with the radio on or if the ventilation fan is above the...
This seems to be related to the high pressure fuel pump. The vibration is getting through and into the cabin. Its normal but really annoying. Some people were able to resolve or greatly diminish the noise by adding insulation but I havent found any pics which show where it was added.
Interesting, my 2022 has been producing the same buzzing sound from the very first day.
I noticed this buzzing tonality or pitch changes with the speed of driving. In other words the higher speed you have the higher buzzing pitch is produced.
Does the fuel pump work harder with the speed increase? If yes then this version can be more realistic.
KukiMazda20
Banned
I had the same issue. Visit the dealership it is probably a headlight motor. they replaced mine and it stopped the buzzing.
With 2022 maxda cx 5 we had buzzing sounds from the headlight motor. With my Mazda 2017 cx5 it was a door issue explained here: https://static.nhtsa.gov/odi/tsbs/2021/MC-10206007-0001.pdf
can you relate to this: https://static.nhtsa.gov/odi/tsbs/2021/MC-10206007-0001.pdfThese threads may be related to the issue you're having.
Very faint high pitched "mosquito" sound
My 2019 GTR (only 160 miles) started producing a very faint high pitched sound today in the cabin.. It almost sounds like a mosquito. I notice it when I press the accelerator and when the car is at a standstill. It increases when I press on the accelerator and dies down when I let go of the...
New CX-5, high pitched whine at 80 km/h (50 mph)
I recently bought a 2021.5 CX-5 GS AWD. When driving on secondary highways, I noticed a high pitched whine when the vehicle was going at 80 km/h (50 mph). The sound is distinct but is not particularly loud, i.e. you can't really hear it with the radio on or if the ventilation fan is above the...
No it is definitely the fuel pump. It’s louder when it is very cold out. In the warmer months it’s almost nonexistent. Considering that I have not had a single issue with this vehicle (other than a minor rattle somewhere in front of passenger door), I can live with the “buzz”. As I have stated previously, our 2020 Accord does the same thing in the same conditions. 22,000 miles in and still loving it for what it is!
Hey Jofo67,
I have the same problem with my cx-5 2023. The sound is pretty annoying and very loud. It’s like a loud mechanical buzzing the follows engine power like you said. I have the non-turbo version and mine does the exact same thing. I was wondering if you got it repaired or looked at and if it’s covered under warranty or recalls etc… Thanks!
I have the same problem with my cx-5 2023. The sound is pretty annoying and very loud. It’s like a loud mechanical buzzing the follows engine power like you said. I have the non-turbo version and mine does the exact same thing. I was wondering if you got it repaired or looked at and if it’s covered under warranty or recalls etc… Thanks!
Difinitley buzz. Thank you. I will look into this at my first service appt.
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- Winnipeg Canada
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- 2021 CX-9 Kuro
Ya, I definitely have this buzzing noise on my 2021 CX-9 Kuro. Very annoying. I took it to the dealership (Gerry Gordon's) and they told me that the cold weather can cause the High Pressure Fuel Pump to make more noise because of the pressure release dump valve. The cold weather increases fuel density and somehow moisture levels also play a role (somehow). They compared my CX-9 to a number of CX-9s in the lot and they all made the same noise at idle (they didn't test drive them).
What's interesting is that my 2017 CX-9 GT never made this sound. And I assume many others don't hear that either. So I don't really buy that this is normal.
I'm still interested in the TSB that some have mentioned about dampening the fuel line, or it's bracket. It does sound like something is just vibrating. When it warms up a bit I'll take a closer look at the engine and see if I can locate the source of the buzzing sound. Does anyone have a link to this TSB and what's involved "fixing" this? Do we need to remove the HPFP?
What's interesting is that my 2017 CX-9 GT never made this sound. And I assume many others don't hear that either. So I don't really buy that this is normal.
I'm still interested in the TSB that some have mentioned about dampening the fuel line, or it's bracket. It does sound like something is just vibrating. When it warms up a bit I'll take a closer look at the engine and see if I can locate the source of the buzzing sound. Does anyone have a link to this TSB and what's involved "fixing" this? Do we need to remove the HPFP?
Just an update, when I took it to Mazda for an oil change and had them check the issue, turns out it was the entire transmission that was faulty. They ended up replacing it at no cost. Problem is gone completely and never came back. The mechanics said it’s very rare but can happen. I was a little bummed ngl that my brand new vehicle (at the time) was delivered to the dealer with a faulty transmission. This should’ve been caught by some type of quality assurance at the Mazda factory in Japan but ohh well, I’m just happy they replaced it. It’s now April 2026 and haven’t had a problem since, so a few years later now and still going strong so all good! Hope this helps someone.
