EVAP LEAK DTC P0442, P0455, P0456 INFORMATION This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
full bulletin at NHTSA ↗2014 INFINITI QX80 engine problems
moderate 6 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Complaints
6
Recalls
0
Avg fix
$3,100
When does it fail?
Of the 6 engine complaints filed for the 2014 INFINITI QX80, here's the actual mileage breakdown — failures cluster heaviest at 125,000-150,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Engine accounts for 30% of every owner complaint on file for this vehicle — the dominant problem area across 3 categories tracked.
No new NHTSA engine complaint has been filed on this vehicle in over 11 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
DTC P0456 CAUSED BY EVAP LEAK AT VENT CONTROL VALVE O-RING This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
full bulletin at NHTSA ↗INFINITI; DTC P0456 CAUSED BY EVAP LEAK AT VENT CONTROL VALVE O-RING This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
full bulletin at NHTSA ↗INTELLIGENT KEY BATTERY DISCHARGED This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
full bulletin at NHTSA ↗2005-2015 INFINITI VEHICLES; ECM REPROGRAMMING SERVICE INFORMATION This bulletin is no longer active. Please discard previous versions of ITB15-024.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 6 most recent
Tl* the contact owns a 2014 infinity qx80. The contact stated that the vehicle was leaking oil from the engine gaskets. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The VIN was not available. The failure mileage was 3,000.
My timing chain was stretched. This is the same problem the Infiniti qx56 had. My qx80 has the same motor and replacement timing chain part. The qx56 was issued a voluntary service campaign for this problem. My chain has not been included. Even though it has the same junk timing chain. Infiniti quoted me a repair price of $4800.
The contact owns a 2014 Infiniti QX80. The contact stated that while starting the vehicle, there was a loud winding noise coming from underneath the vehicle. The same noise would occur while attempting to accelerate. The contact took the vehicle to the dealer who diagnosed that the timing chain had failed and needed to be replaced. The vehicle was in the process of being repaired. The…
The contact owns a 2014 Infiniti QX80. The contact stated while driving 50 MPH, the vehicle began to stall. The contact veered to the side of the road and kept the vehicle running. There was no warning light illuminated. The contact then returned to her residence. The contact stated that the failure reoccurred while driving. The check engine warning light was illuminated. The contact contacted…
Tl* the contact owns a 2014 Infiniti qx80. The contact stated that while starting the vehicle, there was an abnormal squealing sound coming from the engine, lasting for approximately ten minutes. There was an unknown warning light illuminated during the failure. The contact took the vehicle to faulkner Infiniti mechanicsburg (6720 carlisle pike, mechanicsburg, pa 17050, (717) 691-8900) to be…
I starting hearing a grinding noise coming from engine couple of weeks ago. Took it to the Infinity dealership for a diagnostic test. The mechanic stated “ timing chains were found to be stretched and metal was worn.” This is the same issue which prompted the recall of 2011-2013 QX56 models. However, I did not own my vehicle during the recall period.
Had engine trouble with your 2014 INFINITI QX80?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2014 INFINITI QX80?
It's a documented issue but not catastrophic. 6 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Based on the 6 complaints filed, engine issues most often appear around 92,007 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2014/INFINITI/QX80.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.