Yes... I bought a 2004 Marquis in August and had to replace the quick connector to the air supply. I went to Home Depot. I purchased all the things, including a 50 ft air line, so I could fill tires and blow out the water system for winter. If you plan to use your coach air supply for winterizing, then you should get a pressure regulator. I think the manual advises 45 lbs max. After I got everything installed I wrapped the quick connector with duct tape to keep it clean from roadborn dirt and moisture.