Mercury Mariner Fuel/propulsion System Problems

Source: NHTSA · Updated Aug 11, 2026 · 109 complaints analyzed

Owners have filed 109 complaints with NHTSA about fuel/propulsion system problems on the Mercury Mariner across 6 model years. The 2010 model year has the most (57). The words owners use most often: “throttle body” (36% of reports).

What owners describe

Phrases that appear unusually often in these complaints compared with complaints about other cars.

  • Throttle body: mentioned in 39 of 109 complaints (36%)
  • Fuel gasoline: mentioned in 15 of 109 complaints (14%)
  • Lost acceleration: mentioned in 7 of 109 complaints (6%)
  • Minutes restarted: mentioned in 6 of 109 complaints (6%)

At what mileage do fuel/propulsion system problems happen?

Based on 83 complaints that reported the odometer reading.

Under 10k miles2 · 2%
10k–25k miles3 · 4%
25k–50k miles30 · 36%
50k–75k miles18 · 22%
75k–100k miles11 · 13%
100k–150k miles17 · 20%
150k+ miles2 · 2%

How serious are the reports?

None of the 109 complaints report a crash, fire or injury.

Mercury Mariner fuel/propulsion system complaints by model year

Peak: 2010, with 57 complaints
2005: 3200532006: 4200642008: 8200882009: 152009152010: 572010572011: 22201122

n = 109 complaints · Source: NHTSA

Model yearFuel/propulsion System complaintsShare of that yearMedian miles
2011 Mariner2225%49,000
2010 Mariner5721%48,655
2009 Mariner155%76,750
2008 Mariner82%117,000
2006 Mariner46%100,000
2005 Mariner34%58,000

When owners reported it

Peak: 2013, with 44 complaints
2012: 4201242013: 442013442014: 8201482015: 4201542016: 4201642017: 112017112018: 152018152019: 4201942020: 5202052021: 4202142022: 1202212023: 4202342025: 120251

n = 109 complaints · Source: NHTSA

Related recalls (0)

No safety recall lists fuel/propulsion system for the Mercury Mariner. A pattern of complaints does not always lead to a recall.

What owners report

Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.

Engine light came on after putting fuel in my car it is hapless the codes read emission and fuel issues to replace cap but it is hapless it says it's an issue that needs to be fixed now my engine light won't go off

Received May 11, 2025 · NHTSA complaint 11660227

Charcoal canister and purge valve defective stuck at open. Check engine light, dropped fuel economy. Forced vehicle to shut off engine and no power, stop on freeway at full speed.

Received Dec 6, 2023 · NHTSA complaint 11558739

My vehicle keeps throwing codes for the EVAP system. I have noticed many of these vehicles have to have their Purge Valve Cannister replaced along with the selenoid for it. I have to replace mine. Is that not a defect if the vehicle? I have owned several vehicles and never had this issue with any…

Received Sep 9, 2023 · NHTSA complaint 11543619

I bought a 2010 Mercury Mariner on June 22, 2023 from a local dealer. There are several recalls associated with the make and model of the vehicle, but they do not appear to be associated with the VIN on my vehicle. However, the recalls on the vehicle appear to be affecting my vehicle and there is a…

Received Aug 13, 2023 · NHTSA complaint 11538243

While driving on the highway my car just cut off in the middle lane. I was able to get into the emergency lane.

Received Nov 18, 2021 · NHTSA complaint 11440974
Mercury Mariner
2005-2007 Mercury Mariner photographed in College Park, Maryland , USA.. Representative photo; appearance varies by model year. Photo: IFCAR, Public domain, via Wikimedia Commons.

Frequently asked questions

Do all Mercury Mariners have fuel/propulsion system problems?

No. NHTSA has 109 owner complaints about fuel/propulsion system for the Mercury Mariner. Complaint data shows that the problem is reported, not how many of all cars sold are affected.

Was there a recall on the Mercury Mariner fuel/propulsion system?

No recall currently lists fuel/propulsion system for this vehicle.

What do owners say about fuel/propulsion system problems on the Mercury Mariner?

The most frequent phrase is “throttle body”, in 39 of 109 complaints, followed by “fuel gasoline” (15).

Other Mercury Mariner problems

See all Mercury Mariner problems.