AutoShack Rear Brake Rotors for Acura, MDX 2017-2020, AWD FWD V6 3.0L 3.5L – Coated – ArmorStop – 12.97″ (329.5 mm), 5-Lug. Brake rotors are essential to your vehicle’s safety. Worn, warped, or thinned rotors can cause excessive noise, vibration, and reduced stopping power.