Strange sound...

[Amsr]

I have this sound when starting the car... what could be wrong?

Never noticed before that it was so low. But today was cleaning the car on a closed space and it was loud.... could ir be a pump failure of any kind???

2017 rex, all seams to be working well

Regards.
Andre.

 

[alohart]

There is an electric vacuum pump that provides the vacuum needed for the power brakes. It might need to run when an i3 is started to evacuate a vacuum storage tank. However, I don't know where this pump is and whether the sound you're hearing would indicate a defective pump.

 

[Amsr]

There is an electric vacuum pump that provides the vacuum needed for the power brakes. It might need to run when an i3 is started to evacuate a vacuum storage tank. However, I don't know where this pump is and whether the sound you're hearing would indicate a defective pump.

Does your i3 makes any kind of noise when starting?

 

[Amsr]

Checked the fluids today and all of them are ok... it's a strange sound.....