MX5 Shop (new) › ND Window Reg MX5 Image 1 of 1 ND Window Reg MX5 from $121.62 New genuine window regulator for ND, fits both soft top & RF models.Common issue on NDs, easy to change over. Side: Select Side Left Right Add To Cart Added! New genuine window regulator for ND, fits both soft top & RF models.Common issue on NDs, easy to change over.