You've just made a third gear pull in your FBO 335i when suddenly the dash indicates that coolant temperatures are on the rise. A few moments later you're on the side of the road staring at a puddle of coolant under your car. Water pump failure is quite common with BMW N54/N55 models, and is often considered a preventative maintenance item to be replaced at regular intervals. Luckily, Mishimoto has stepped up to provide a high-quality electric water pump replacement for the BMW N54/N55 engine! The Mishimoto N54/N55 water pump is a direct replacement for the OEM water pump and includes replacement mounting hardware for a seamless hassle-free installation. To further protect your cooling system and improve water pump lubrication, refill your system with Mishimoto Liquid Chillandreg Synthetic Engine Coolant. As with all our products, this water pump is covered by the Mishimoto Lifetime Warranty.