The aluminum rear shock mounts on certain Mazda vehicles can corrode, weaken and fail from exposure to road salt and brine, and the dealer requires replacing the entire assembly. This Dorman OE FIX suspension shock mount saves expense by allowing the replacement of just the failed mount rather than the entire assembly, and because it's constructed of rugged cast iron with a rust preventive coating, also provides a more robust, longer-lasting repair. The shock mount comes complete with new mounting nuts for a thorough, professional installation.