The Nissan EGR valve is a small component that is a vital part of two of your vehicle's most important systems, the emission system and the ignition system. The Nissan EGR valve on older model vehicles functions mechanically, while those in late model vehicles are usually electronic. The Nissan EGR valve in most vehicles is mounted on the intake manifold. The Nissan EGR valve has a vital role in the reduction of harmful vehicle emissions, and helps reduce engine knock by assisting in the prevention of fuel detonation in the engine cylinders, which can be the source of expensive damage to many engine parts, and can significantly reduce engine efficiency. A faulty Nissan EGR valve can cause a number of problems in your vehicle. Among these is a loss of engine power, engine knock or ping, poor fuel economy and excessive vehicle exhaust emissions. With the strict emission control regulations of today, a properly functioning Nissan EGR valve is necessary to pass emissions testing and keep your vehicle fit for the road and legally acceptable. The Nissan EGR valve is vehicle specific, so it is important to be sure to get the one suited to the exact production year, model and engine of your vehicle to ensure smooth and efficient engine performance. We carry a selection of quality Nissan EGR valve replacements in our user-friendly online catalog, all at great prices. Our live help service, easily available on our site, is happy to assist you with any questions, or help you in choosing the right Nissan EGR valve to suit your vehicle needs. Ordering your Nissan EGR valve will be safe and efficient on our secure site, or our toll-free phone line is available to take your order just as conveniently.