Very high engine temperatures could be threatening to your car emissions, and that is the reason why you have an EGR valve mounted in your Mercury Marquis-to secure the powerplant of your auto from turning too heated. Your Mercury Marquis EGR valve is engineered to direct a particular portion of fumes from the exhaust system towards the intake system and the cylinders in order to provide cooling to the combustion area, averting the rise of temp in your car motor.

Aside from exhaust performance, the EGR valve equally affects the overall efficiency of the automotive engine-problems on the device often causes a lousy engine performance. As soon as the Mercury Marquis EGR valve ends up busted, expect to feel roughness when idling as well as stalling-never neglect the said issues or these may bring about considerable troubles. Cautiously inspect the part and meticulously check its ability to open or close-a large number of EGR valves break down by means of becoming stuck, not being able to regulate the movement of exhaust gases.

If you find your Mercury Marquis EGR valve defective by any means, replace it at once-we offer more options only here in our catalog at Parts Train. We've got more than 1 million auto parts and accessories in stock, each of which is obtained from first-rate companies; Omix, Wahler, plus OE Aftermarket are just a few of them.