Whirring Electric Motor Sound (Brakes?)on Start-Up Bronco Sport Badlands 2.0 Liter Engine

[tsilveira]

Hello. Can anyone provide an opinion on what that whirring sound is that I hear seemingly coming from the rear brakes (or rear of car) when I depress the start button to start the ignition? The sound lasts at most for 3 to 4 seconds. I "suspect" that it has something to do with the braking system that kicks in, or releases on start-up. I don't know whether it is a new noise or one that I am aware of now that the weather is warm and my windows are open on start-up. Thank you for your input.

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[BroncoMike]

My guess would be the fuel pump, I haven't noticed it on mine. I'll listen for the sound you describe next time I start it. This thing makes so many clicks, whirrs, beeps, and boops, you'd never know if something was wrong.

 

[tsilveira]

I have a video, seven seconds long with the sound but I am unable to upload it because apparantly the file is too large.

 

[tsilveira]

 

[tsilveira]

There is the sound I was talking about.

 

[BronzeSmokeBadlands]

Hmm mine makes this noise too...I've always thought maybe its an exhaust sound...meaning exhaust is first going through the pipes at start-up....just a guess. would like to know what it is though out of curiosity.

 

[tsilveira]

I was at my local Ford dealer this morning trying to ascertain what the source of this noise on startup is. Of course, as expected the mechanic said that it was a normal noise that all Bronco Sports make on startup. Standard dealership answer. But I have noticed that if I start my car remotely that noise does not happen. It does happen however when I get in the car, depress the brake and push the start button.

 

[BronzeSmokeBadlands]

I was at my local Ford dealer this morning trying to ascertain what the source of this noise on startup is. Of course, as expected the mechanic said that it was a normal noise that all Bronco Sports make on startup. Standard dealership answer. But I have noticed that if I start my car remotely that noise does not happen. It does happen however when I get in the car, depress the brake and push the start button.

Yep, good point mine does this as well after remote start......

 

[tsilveira]

That is why I still suspect that the noise must be the mechanism releasing the electronic parking brake.

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