I'm looking to replace all my vacuum lines. Curious to know the size of the lines. I've tried doin some searching but no luck. I find some sites that sell it in spools but I need to know the correct size before I order. Needin help.

 

I would just buy 3mm, 6mm, and 10mm in ten foot sections each. Cutting and replacing as I remove them, then return which one isn't used.

 

Buy a bunch of 6mm, cut to fit. Silicone vacuum hoses are cheap. Make sure u don't let it touch any oil and it will last a long time

 

Take a sample to your local parts store to match the sizes and then order he correct size in the fancy stuff.

Are you removing the upper intake to replace all the lines? Its not hard, you just need to take your time and pay attention to where eveything goes.

 

4 and 6mm will fit ... most are 6mm.

Mazda has not change the size(dont need.to) of vacuum hose for decades ...