got them replaced last year and they are rattling again
the anti sway, I used the stock parts,

is there an aftermarket that will last more than 15000 miles without going bad?
or a modification that I can do?

 

u mean replace the end link? I just replaced mine month ago orderd from Rockauto $27 shipped, compare oem and new side to side, new one are much thicker beeffer, don't know how long it last but atleast a looooot cheaper than oem. It was made at Japan too, said on the box label.

 

the stabilizer links
I am going to tighten them and add some loctite
hopefully they will stay tight till,,,,,,

 

Had that problem on my 02. They wore out really fast too. I just brought the car brand new and 3 months later they were rattling. Dealer replaced them udner warranty and the problem never came back, but I was told that it's a common problem on the maxima and if they aren't put on correctly the wear out fast again....I don't think OEM are trash just make sure to install them correctly and they should last.........