Certain G80 and G90 Genesis vehicles may experience DTC code P0597 for âThermostat Heater Control Circuit/Openâ. This bulletin provides information on replacing the electric thermostat. No drivability issues are associated with this condition.
full bulletin at NHTSA ↗2017 Genesis G90 engine problems
moderate 8 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Complaints
8
Recalls
0
Avg fix
$3,100
When does it fail?
Of the 8 engine complaints filed for the 2017 Genesis G90, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 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.
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.
This bulletin provides the service procedure for engine connecting rod bearing clearance testing. Perform the procedure outlined in this bulletin to fulfill the Bearing Clearance Test inspection requirements to determine next required steps.
full bulletin at NHTSA ↗This bulletin provides information regarding the changes in the timing chain and the crankshaft sprockets on certain Genesis G80 (DH) and Genesis G90 (HI) vehicles equipped with Lambda 3.3T / 3.8L GDI engines.
full bulletin at NHTSA ↗This bulletin provides information regarding the changes in the timing chain and the crankshaft sprockets on certain Genesis G80 (DH) and Genesis G90 (HI) vehicles equipped with Lambda 3.3T / 3.8L GDI engines.
full bulletin at NHTSA ↗This bulletin provides the procedure to replace the O-ring to the automatic transmission fluid (ATF) warmer connector on some vehicles which may exhibit a coolant leak between the ATF connector and engine side heater pipe.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 8 most recent
The contact owns a 2017 Genesis G90. The contact stated that while driving at an undisclosed speed, there was smoke coming from underneath the hood. The oil warning light intermittently illuminated. The vehicle was taken to an independent mechanic, who determined that the engine was leaking oil and advised the contact to take the vehicle to the dealer. The vehicle was then taken to the dealer,…
The check engine light keeps coming on. We had spark plugs changed and still keeps miss firing. We are unable to switch between drive modes smoothly. We have taken in for service numerous times.
I have replaced my thermostat four times in the last 18 months and I had it towed to the dealership again this morning for the same overheating problems.
* Recall Campaign Number : [018G, 019G] I. Statement of Complaint This complaint concerns a failure in a critical safety-related component that was previously addressed under a mandatory manufacturer recall, and the subsequent refusal by the authorized dealership to provide a second no-charge repair for the same repeated failure. II. Chronology of Events * Original Recall Repair: Approximately…
See attached document for complaint.
The contact owns a 2017 Genesis G90. The contact stated that while driving at 50 MPH, the check engine warning light illuminated. The driver immediately pulled over. The vehicle was towed to the local dealer, where it was diagnosed, and it was determined that four crankshaft position sensors and the valve cover gasket needed to be replaced. The vehicle was repaired, but the failure recurred. The…
See attached document for complaint.
The contact owns a 2017 Genesis G90. The contact stated that while the vehicle was parked and running, the vehicle was idling rough and shaking. The vehicle restarted; however, the shaking failure recurred. The vehicle was not repaired. The contact received notification of NHTSA Campaign Numbers: 24V107000 (Electrical System) and 24V191000 (Engine and Engine Cooling) however, the parts to do the…
Had engine trouble with your 2017 Genesis G90?
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 2017 Genesis G90?
It's a documented issue but not catastrophic. 8 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 8 complaints filed, engine issues most often appear around 91,000 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/2017/Genesis/G90.
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.