Hello just wanted to know what this hose does? When the car is running the hose kinda flattens out like it needs a stronger hose it's like it's collapsing... it's hooked to the break fluid and the intake. I'll add photo

 

 

Vacuum for the brake booster

 

do u think we should replace hose ? Or does it matter that much? And thank for ur help

 

Looks like half the hose been replaced. If it isn’t giving you problems just leave it, or replace it to get rid of that ugly color

 

If it's collapsing, it's not a hose designed for vacuum. Just replace it.

 

how do we know if it's causing a problem like what are the symptoms for being collapsed like that. we took it to the Honda dealership he said it really wasn't that big of a deal

 

It could cause your power brakes to not assist as expected. It might not though.

 

To see if it's collapsing, start the car, someone stand and watch while the other sits inside and pumps the brakes and/or presses and holds the brakes. Pumping tends to cause the most vacuum as you will notice the idle raise from it. If the hose collapses while pumping, you know the hose is ineffective.