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moderate Owners of the 2008 INFINITI QX56 have filed 4 NHTSA complaints about the fuel system at roughly $1,200 to repair (U.S. federal records, as of August 2026). Source: NHTSA Office of Defects Investigation. See fuel system across all vehicles →
| Model year | fuel system complaints |
|---|---|
| 2005 QX56 | 13 |
| 2006 QX56 | 4 |
| 2008 QX56 (this page) | 4 |
This could cause the vehicle to run out of gas and stall on the highway, which could cause a crash.
The manufacturer has issued service bulletins covering fuel system 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.
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 ↗INFINITI; FUEL TANK IS EXTREMELY DIFFICULT TO FILL The update below was sent out to Regions and Retailers in August of this year. We are re-circulating this update to make regional and retailer personnel aware that we are re-notifying clients at this time.
full bulletin at NHTSA ↗INFINITI; FUEL TANK IS EXTREMELY DIFFICULT TO FILL This bulletin has been amended. Changes have been made throughout. It is necessary for you to read this revised procedure to properly perform this action. Please discard previous versions of this bulletin.
full bulletin at NHTSA ↗INFINITI; FUEL TANK IS EXTREMELY DIFFICULT TO FILL IF CUSTOMER REPORTS: Customer routinely experiences difficulty fueling the vehicle at different fuel stations (filling nozzle shuts off every few seconds while filling at multiple stations and using multiple filling pumps). IMPORTANT: - If the customer does not report the above symptoms, this bulletin does not apply. - If the customer reports intermittent (but not consistent difficulty re-fueling), this bulletin does not apply. ACTION: Perform the Inspection Procedure in this bulletin, starting on page 4, only if the customer reports symptoms as described above. NOTE: Refer to the Repair Overview on page 2.
full bulletin at NHTSA ↗INFINITI; FUEL TANK IS SLOW OR DIFFICULT TO FILL IF YOU CONFIRM The fuel tank is slow or difficult to fill (filling nozzle shuts off before tank is full). IMPORTANT: Make sure this incident has been duplicated at a gas station by dealer service staff. ACTION Perform the Service Procedure in this bulletin, starting on the next page.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
It's a documented issue but not catastrophic. 4 complaints have been filed. Repairs average $1,200 and most owners catch it before it causes a breakdown.
Based on the 4 complaints filed, fuel system issues most often appear around 68,125 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.
Independent shops typically charge around $1,200 for fuel system 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.
Yes — 1 active recall(s) cover fuel system issues on this vehicle. Recall fixes are always free regardless of mileage or warranty status. Use the VIN decoder at the top of the page to check if your specific vehicle is affected.