Two problems related to gas recirculation valve (egr valve) have been reported for the 2017 Nissan Pathfinder. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2017 Nissan Pathfinder based on all problems reported for the 2017 Pathfinder.
With engine running, the electric cooling fans wobble when they come on, most likely due to worn bushing/bearing. The fans don't appear to be hitting anything but make a loud audible tapping noise. Driver side fan seems worse than passenger side. The fans come on as soon as I turn on the cabin fan to circulate air; this is 45 degree f weather and "heat" not a/c. Internet search shows this problem has been reported by other owners.
Loud knocking noice coming from engine, after research and dealer checkup it appears to be a very common problem for these 2014-2018 Pathfinders. The problem typically occurs around 50-60k miles which is outside of the manufactures warranty. Mine began around 50k, anytime my engine gets hot and both fans kick on the cooling fan assembly starts violently vibrating (I have video with sound). The only way to stop the vibrating is to turn off the a/c which in our texas summer heat reaching over 100 degrees is unrealistic considering I use this as a family vehicle. If you look at all of the complaints reported you and do a simple google search you will see this is a very common problem and Nissan is fully aware of it and in my opinion should be liable for installing a faulty fan. I was quoted $950 to replace the bad cooling fan assembly part by the dealership. It is my sincere hopes that a full investigation is done and a recall is issued for the number one complaint with this vehicle.