I am currently putting engine back to together on 2010 Maxima but I don’t want to use the existing vacuum lines. I would prefer to use the cloth braided vacuum lines that I use on European cars problem is I don’t know the size of the vacuum line example will be the lines that connect by the fuel rail I know it’s metric probably 3.5mm but not positive. Does anybody know the correct size?

 

Here are two ways I would figure this out
1. Take a small piece to the auto parts store and have them measure it,
2. Find a twist drill bit and fit the shank into the hose. It should go in without any slop and not to snug. The drill bit is the size.

 

+1 for those hints.
I just threw out all my old packaging when I was doing my garage spring cleaning but I replaced them all last summer or I would be able to take a look.

 

Mine and I got 4mm for under beauty face plastic. I think I have 3mm n cars been saying stuff like sir fuel ratio always wrong,when every parts new.all gas,throttle,, gas pedal complete. I put a. Ew upstream 02 in and tip fell off in cat. Don't know if that means anything. But lmk if you get correct specs,thanks