A thumping heard and felt in the floor is often caused by failing engine mounts. A failing mount allows too much movement of the engine, and will require replacement.Google+
Car Problem Reports
Nissan Quest Failing Engine Mounts Will Cause Thumping in Floor
Nissan Quest Problem
Engines Affected: 3.0L V6, 3.3L V6, 3.5L V6
Average Mileage: 111,479 mi (59,000 mi - 176,500 mi)
Visitor, 2000 Nissan Quest, 3.3L V6
engine mounts seem to go out on this van all the time. The car makes a jerking noise when starting from a stop unless you go real slow. we have already replaced them twice and it is acting like they need to replace them again.
Visitor, 1998 Nissan Quest, 3.0L V6, 147,000 mi
Seems as if this car was manufactured in the wrong way! I dont care where you get motor mounts from! weather its the stealer or aftermarket! the design is just defective
I am furious with Nissan! For failing to recall this model. These Engine mounts break consistently, I have paid twice to get these engine mounts replaced its a lot of money when your reading a family. Nissan should replace these mounts for free. Not only that you can't accelerate right with the broken mounts. Help is there a real solution to this problem
I have replaced my engine mounts at lease every 4-6 months in my 2002 Nissan Quest for over 3 years and I am so tired of hearing they were put in wrong or it is because I use after market parts. I switched mechanics and he used genuine Nissan parts that were out of stock, hmmm wonder why??? and now I am going to need to replace them.
Visitor, 1999 Nissan Quest, 3.3L V6, 176,500 mi
My 1999 QUEST has this problem, motor mounts need replacing too often.
Visitor, 2002 Nissan Quest, 3.3L V6, 136,000 mi
wjth key on i turn to start but it doesnt it justs staLLS
Visitor, 2000 Nissan Quest, 3.3L V6
We bought a 2000 Mercury Villager which is really a Nissan Quest in 2011 and have had to replace the motor mounts three times, husband installed a limiter strap and just keep burning through them! So frustrating, but glad to know not alone!! Poor design is right! Only three mounts, two rear and one front! Not too bright Nissan!
Visitor, 2001 Nissan Quest, 3.3L V6, 155,778 mi
replace front and rear engine mounts three times in six months I don't understand why I was thinking something was bent or broken but don't look like it any clues will be appreciate!!!!!!!!!
had the same problem. easily fixed it. It may be accompanied by the driver side axle going bad. If ale is bad then i recommend replaing axle the same time you replace the engine mounts.
There are 4 mounts, two on each side and one infront, and one in back of engine.
The most likely suspect mounts are the left mount, and the front (rightward) mount.
I replaced just those two in mine nd problem went away!
You need two jacks one to lift the car up, and one to support the engine as you lower and lift it up to replace the engine mount. 1 hour job at the most.
Visitor, 2001 Nissan Quest, 3.3L V6, 107,000 mi
The motor mounts were broken when I bought this van with 107000 miles on it two years ago. It now has 159,000 miles on it as I sometimes drive 200 miles per day. I have changed the motor mounts numerous times and used them from every parts store in the area. Once I changed them all, even the ones that weren't broken. The design flaw is in the front and rear mounts and has to do with the stress that is put on the engine when it kicks in and out of fourth gear. The last time I changed mine was 20,000 miles ago. That time I had the mechanic weld a piece of steel across the mount and bore a hole where the bolt goes that holds the mount to the motor(just on the front mount). This is something that he foreign car hot rodders do. The down side to doing this is you feel a lot of engine vibration when you stop at red lights. So far it hasn't caused any other problems. I am going to take the mount off today and bore the hole a little bigger to let the rubber take some of the vibration.