Ethanol is becoming a common additive in gasoline. Gasoline containing ethanol is likely available at your local gasoline station. Typical blends of ethanol include E10 and E85. E10: A blend of 10% ethanol and 90% gasoline. E85: A blend of 85% ethanol and 15% gasoline All Mazda vehicles can run on gasoline containing up to 10% ethanol (E10) but only some 1999-2001 B3000 trucks can run on gasoline with more than 10% ethanol blended. E10 compatible vehicles: All Mazda vehicles. E85 compatible vehicles: 1999-2001 B3000 Mazda trucks with the 8th VIN digit is V.
full bulletin at NHTSA ↗2011 Mazda Mazda6 fuel system problems
moderate Owners of the 2011 Mazda Mazda6 have filed 3 NHTSA complaints about the fuel system at roughly $1,200 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See fuel system across all vehicles →
Complaints
3
Recalls
0
Avg fix
$1,200
| Model year | fuel system complaints |
|---|---|
| 2008 Mazda6 | 4 |
| 2009 Mazda6 | 3 |
| 2011 Mazda6 (this page) | 3 |
What stands out
Among the 5 model years of Mazda Mazda6 in our records for fuel system problems, this one ranks #3 by owner-complaint volume.
No new NHTSA fuel system complaint has been filed on this vehicle in over 14 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 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.
In support of the new MRT distribution, Mazda will ship to dealers a new Dual Purpose Diagnostic Leak Detector beginning March, 2019. Training videos will be posted to MGSS shortly and Workshop Manual procedures will be revised gradually.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 1 most recent
Car is new, less than one month since purchase. Issue has occurred with every fill-up. When filling up with gas, as soon as or near tank is full, gas spews out of tank. Took to Mazda dealer on 11/19/2011 and they cannot find what the cause is. Seems like a highly dangerous problem to have gas shooting from the tank. Also, it could be a faulty valve that may malfunction in the case of a rollover,…
Had fuel system trouble with your 2011 Mazda Mazda6?
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 fuel system problem on the 2011 Mazda Mazda6?
It's a documented issue but not catastrophic. 3 complaints have been filed. Repairs average $1,200 and most owners catch it before it causes a breakdown.
At what mileage does the fuel system typically fail?
Based on the 3 complaints filed, fuel system issues most often appear around 12,500 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 $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.
Are there any recalls related to fuel system?
No active recalls currently cover fuel system 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/2011/Mazda/Mazda6.
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.