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Discussion Starter · #1 ·
Approaching one year of ownership for my QX80 Limited. I really can't complain ... some minor nuisances, but otherwise vehicle has performed admirably.

3900 miles since new ... I typically use on weekends in nice weather and full time in winter ... you would expect no problems with this low mileage.

* Added Extended warranty to cover 96 months ... all these electronics plus this thing vehicle is huge so expect parts will be expensive down the road.
* I added Xpel to front of hood and fenders ... I got a big multi facet chip the first week that needed to be fixed ... so had this added and it's done the job.
* Ceramic Pro Platinum really makes the Imperial Black shine and helps rinse off the vehicle including rims.
* Treated interior leather and carpets with GTechniq ... once per year.
* Black Pearl Tire coating ... applied every 6-months and keeps the tires looking nice and black.
* Had first service just to change the oil ... probably don't need to do this but always had the engine oil changed at 1000 miles.
* Did the 2G to 3G upgrade. I guess having a co-pay was OK since they added 12-months of the full Infiniti Connection suite to the vehicle.
* Local Infiniti dealer service is a pleasure to deal with ... service loaners, available pick-up/drop off and office area should I want to set-up shop and wait.

My only peeves with the vehicle

* I really miss not having a separate window on the rear gate ... had this on my Escalade and it was really handy.
* No rear gate adjustment to set the opening height ... its open or closed ... and that is a big lift gate that rises well above the top of the roof. This feature is available on other QX models.
* $90.5K MSRP ... got close to 10% off ... but still wonder compared to others in that price range. I paid for reliability not a fancy name plate.
* Averaging 13 mpg for a 50:50 split of city and highway using 93 octane ... I wasn't expecting a miracle, but this is less than comparable Escalade or Range Rovers.
* Occasionally the brakes will sink lower to floor when sitting on a hill or stopping suddenly; surprised no hill assist feature in the vehicle.
** Distinct smell of antifreeze when shutting off car. This is around radiator cap area. Dealer pressure tested and no leak; level if still like new ... so they said to monitor. It wasn't there new, so know it should not be there now, (and not on the 2017's we checked).
*** The vehicle is developing a "harmonic vibration" around 65-75 mph ... this bugs me. Worse in cold weather, much less noticeable in summer. This was faintly noticeable on new 2017's with 22" wheels tested, but not to the degree I'm noticing on mine. No vibration in steering wheel. They did road force balance and rotated tires which improved, but didn't eliminate. There is something in drive train or exhaust just can't figure. It is not noticeable at low speeds or >80 mph. Harmonics were a major issue with the new generation of GM's ... one reason I didn't get another Escalade. I believe GM's issue is due to thin sheet metal in the roof / lack of padding under to absorb the vibration.

Other than my couple of peeves this vehicle has been solid and reliable through year one.
 

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Approaching one year of ownership for my QX80 Limited. I really can't complain ... some minor nuisances, but otherwise vehicle has performed admirably.

3900 miles since new ... I typically use on weekends in nice weather and full time in winter ... you would expect no problems with this low mileage.

* Added Extended warranty to cover 96 months ... all these electronics plus this thing vehicle is huge so expect parts will be expensive down the road.
* I added Xpel to front of hood and fenders ... I got a big multi facet chip the first week that needed to be fixed ... so had this added and it's done the job.
* Ceramic Pro Platinum really makes the Imperial Black shine and helps rinse off the vehicle including rims.
* Treated interior leather and carpets with GTechniq ... once per year.
* Black Pearl Tire coating ... applied every 6-months and keeps the tires looking nice and black.
* Had first service just to change the oil ... probably don't need to do this but always had the engine oil changed at 1000 miles.
* Did the 2G to 3G upgrade. I guess having a co-pay was OK since they added 12-months of the full Infiniti Connection suite to the vehicle.
* Local Infiniti dealer service is a pleasure to deal with ... service loaners, available pick-up/drop off and office area should I want to set-up shop and wait.

My only peeves with the vehicle

* I really miss not having a separate window on the rear gate ... had this on my Escalade and it was really handy.
* No rear gate adjustment to set the opening height ... its open or closed ... and that is a big lift gate that rises well above the top of the roof. This feature is available on other QX models.
* $90.5K MSRP ... got close to 10% off ... but still wonder compared to others in that price range. I paid for reliability not a fancy name plate.
* Averaging 13 mpg for a 50:50 split of city and highway using 93 octane ... I wasn't expecting a miracle, but this is less than comparable Escalade or Range Rovers.
* Occasionally the brakes will sink lower to floor when sitting on a hill or stopping suddenly; surprised no hill assist feature in the vehicle.
** Distinct smell of antifreeze when shutting off car. This is around radiator cap area. Dealer pressure tested and no leak; level if still like new ... so they said to monitor. It wasn't there new, so know it should not be there now, (and not on the 2017's we checked).
*** The vehicle is developing a "harmonic vibration" around 65-75 mph ... this bugs me. Worse in cold weather, much less noticeable in summer. This was faintly noticeable on new 2017's with 22" wheels tested, but not to the degree I'm noticing on mine. No vibration in steering wheel. They did road force balance and rotated tires which improved, but didn't eliminate. There is something in drive train or exhaust just can't figure. It is not noticeable at low speeds or >80 mph. Harmonics were a major issue with the new generation of GM's ... one reason I didn't get another Escalade. I believe GM's issue is due to thin sheet metal in the roof / lack of padding under to absorb the vibration.

Other than my couple of peeves this vehicle has been solid and reliable through year one.
Nice "review" of your ownership experience! We got about $8k off of MSRP, so you may have done a little better than I did. Still seems like it was below invoice, though. I was happy with my price, which is what matters.

We usually average between 14 and 15 mpg. It sucks, but that's the penalty to be paid for a large three row SUV, I guess. It would be nice to so an ECO Boost-type engine make its way into this vehicle, providing better fuel efficiency without the performance penalty. But, I enjoy the performance and sound of the large V8, so I'd probably miss it!

As for your other issues (brakes, smell, vibration), I haven't experienced any of those. Our vehicle has been nothing but perfect in our 10 months of ownership. Glad to have the extended warranty, as well, as I expect to have this vehicle for a long time.

BTW, we got ours last February and we're just over 15k miles! I wish we could drive it more like you, but with three kids, two of which don't drive, we do a lot of running around. We had our 2013 QX56 for 3 years and we put 60,000 miles on it!
 

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Anyone have issues with the brake pedal causing a buzzing noise and occasional clicking noise? Just got mine a few days ago brand new and am concerned about this.
 

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Discussion Starter · #4 ·
Anyone have issues with the brake pedal causing a buzzing noise and occasional clicking noise? Just got mine a few days ago brand new and am concerned about this.
Not me, but heard that comment before. Being brand new I'd call the service manager and have them check it out. It be a bad interlock switch or contact on brake.
 

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Discussion Starter · #6 ·
Went in for my 5000 mile service ... basically an oil change/lube. The tires were previously road forced balanced and rotated in December.

Dealer gave me a new 2017 AWD (15 miles) with 22" wheels for me to drive the day and see if I felt it was much different than mine.

The harmonic vibration is there on this new one. Especially since this vehicle was outside around 32F. It got much better in afternoon when temperatures warmed up to 54F. I've convinced myself this is common and really apparent on smooth roads in cold weather with the 22" wheels. In fact, my Limited was noticeably smoother ride since it has the upgraded dampening suspension not on this test model. Dealer road force balanced tires again which does seem to help. Coming from an Escalade, I'm used to the softer ride and suspect as these Bridgestone Dueler H/T tires age the rubber compound will harden slightly too.

Back in fall, I had the 2G to 3G upgrade. I noticed numerous times the Infiniti Connection green light was off and no service connection ... I could re-sync and update files, but that would kick out a few days or week later. Turns out I had a bad head unit ... and since October installation Infiniti has changed up the 3G model ... so the new version is now in vehicle. I suspect this should resolve.

I've had 3 occurrences over last 3 weeks when wipers come on in "auto mode" on dry day and stay on unless you manually put on off. Or shutdown car and restart ... dealer couldn't replicate ... so I'll monitor.

Other than that can't complain ... my dealer has been super responsive and helpful in taking care of the car and addressing all my concern areas.
 
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