MX5 Shop (new) › Lower Ball Joint - Mazda MX5 NA/NB Image 1 of 1 Lower Ball Joint - Mazda MX5 NA/NB $99.00 Exclusive Mazda mx5 NA/NB lower ball joint - newThey are interchangeable between left and right. Add To Cart Added! Mazda mx5 NA/NB lower ball joint - newThey are interchangeable between left and right. You may want to see this... Extended Lower Ball Joint for NA / NB $379.00