Research · Sport Utility Vehicle - 2WD
2010 Mercury Mariner HybridRecalls, problems, MPG & safety
NHTSA lists 0 safety recalls and 279 owner complaints for the 2010 Mercury Mariner Hybrid. Most complaints involve vehicle speed control (69) and steering (63). The EPA rates it 29–32 mpg combined.
Combined MPG
29–32mpg
EPA · 2 versions
NHTSA overall
—
Not rated by NCAP
Safety recalls
0campaigns
NHTSA
Owner complaints
279
Top: vehicle speed control
Fuel cost / yr
$1,950est.
EPA estimate, best version
Safety recalls
NHTSA campaigns for this model year
0 recalls found in NHTSA data for the 2010 Mercury Mariner Hybrid as of Nov 9, 2026.
Data from NHTSA Recalls API · synced Nov 9, 2026NHTSA vehicle page
Owner complaints by component
279 complaints filed with NHTSA · Mar 2010 – Aug 2026
- Vehicle speed control69
- Steering63
- Engine63
- Power train62
- Fuel/propulsion system57
- Electrical system30
- Fuel system, gasoline8
- Structure7
- Electronic stability control (esc)7
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Data from NHTSA Complaints API · synced Nov 9, 2026 · Full problem breakdownNHTSA vehicle page
What owners report most
Verbatim excerpts from NHTSA complaints, by component
Vehicle speed control
69 reports1 crash
“WHEN INTERING TO TUNNEL MY CAR SUDDENLY SPEED UP IT FELT LIKE I HAD THE GAS PEDLE DOWN TO THE FLOOR. EVEN WHILE HOLDING THE BRAKE ALL THE WAY DOWN, THIS DID NOT SLOW THE CAR DOWN MUCH. THERE WERE NO WARNING LIGHTS OR CHECK ENGINE LIGHTS ON THEN OR NOW”
Steering
63 reports1 crash
“The contact owns a 2010 Mercury Mariner. The contact stated that while driving approximately 20 MPH, an alarm sounded, and the steering wheel locked up. The message "Power Steering Assist Fault" was displayed. The contact was able to drive to the residence nearby. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and informed the contact that the vehicle was previously repaired under recall. The failure mileage was approximately 190,000.”
Engine
63 reports1 fire
“Me and my wife purchased a vehicle from a private seller to use for personal commute. A month later we started to notice more issue were occurring with the car then stated from the seller. I took it to an auto body shop to get it inspected and possibly serviced and upon that inspection the clerk stated that there was a milage adjustment done to the vehicle. We contacted the seller to try and return the vehicle and receive our money back, but the dealer refused and requested us to resell it.”
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 9, 2026
Engines, transmissions & drive
2 versions rated by the EPA
- EPA class
- Sport Utility Vehicle - 2WD, Sport Utility Vehicle - 4WD
- Engines
- 2.5L 4-cyl hybrid
- Transmissions
- Automatic (variable gear ratios)
- Drive
- Front-Wheel Drive · 4-Wheel Drive
- Fuel
- Regular Gasoline
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
Data from EPA fueleconomy.gov · synced Nov 9, 2026EPA listing
EPA fuel economy by version
City / highway / combined, annual fuel cost and CO₂
EPA
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| Mariner Hybrid FWD Auto (variable gear ratios), 4 cyl, 2.5 L · Front-Wheel Drive | 34 | 31 | 32 | $1,950 | 278 |
| Mariner Hybrid 4WD Auto (variable gear ratios), 4 cyl, 2.5 L · 4-Wheel Drive | 30 | 27 | 29 | $2,150 | 306 |
- 32mpg comb.
- 29mpg comb.
Data from EPA fueleconomy.gov · synced Nov 9, 2026 · Fuel cost is EPA’s annual estimate (15,000 mi, 55% city)
NHTSA 5-Star Safety Ratings
1 tested variant
NHTSA has not published 5-Star Safety Ratings for the 2010 Mercury Mariner Hybrid as of Nov 9, 2026.
Data from NHTSA NCAP Safety Ratings API · synced Nov 9, 2026Vehicle 5589
Maintenance basics
General guidance, not the OEM schedule. Check your owner’s manual.
General guidance
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
- Engine oil & filter5,000–10,000 mi
6–12 months - Tire rotation5,000–7,500 mi
Every oil change - Engine air filter15,000–30,000 mi
1–2 years - Cabin air filter15,000–25,000 mi
1–2 years - Brake fluid—
2–3 years - Coolant60,000–100,000 mi
5–10 years - Spark plugs60,000–100,000 mi
— - 12V battery—
3–5 years
Typical intervals for modern cars. Severe service (towing, short trips, extreme heat or cold) shortens them.
2010 Mariner Hybrid questions
How many recalls does the 2010 Mercury Mariner Hybrid have?
0 recalls found in NHTSA data as of Nov 9, 2026.
What are the most common 2010 Mercury Mariner Hybrid problems?
Owners filed 279 complaints with NHTSA. The most-cited components are vehicle speed control (69), steering (63), engine (63). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
What MPG does the 2010 Mercury Mariner Hybrid get?
The EPA rates the 2010 Mercury Mariner Hybrid at 29–32 mpg combined, depending on engine and drivetrain (2 versions rated).
Data from NHTSA & EPA · synced Nov 9, 2026