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 Chill® Synthetic Engine Coolant. As with all our products, this water pump is covered by the Mishimoto Lifetime Warranty.