2009 Mercury Mariner Hybrid Engine Problems
- Complaints
- 4about this part
- Share
- 19%of 21 total for the year
- Median mileage
- 103,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the engine of the 2009 Mercury Mariner Hybrid, 19% of the 21 complaints for this model year. Where a mileage was given, the median is 103,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I was on my way to drop my 3 month old off at daycare and then to work. I was driving down the highway going 60 MPH with the cruise control set when I feel the car start to jerk back and forth a little. I look at my gauges all are normal except the RPM gauge is jumping up and down then all of a sudden it is kick out of cruise control, and I lose acceleration and a wrench light came on. I was almost hit by 2 vehicles because of the sudden lose on speed. As I was losing acceleration, I was trying not to brake because I thought it was going to die. …”
NHTSA complaint #11020561, filed 2017-08, 128,000 miles“2009 Mercury Mariner Hybrid with 93000 miles driving 50 MPH on a six-lane blvd. Hesitates briefly, then accelerator ceases to function completely. Despite the extremely dangerous situation, we managed to maneuver the car off the road to safety. Warning light (triangle with exclamation point) and warning message stop safely now . The car computer knows there is a problem, why doesn't ford? They conducted a customer satisfaction program for millions of escape and mariner owners for this very issue - throttle body defect - but not hybrids. Why not? It cost us $300 and nearly a multi-car accident. …”
NHTSA complaint #10924881, filed 2016-11, 93,000 miles“The contact owns a 2009 Mercury Mariner Hybrid. While driving 70 MPH on a highway, the vehicle stalled. There were no warning indicators illuminated. The vehicle was able to restart after 5 to 20 minutes. The failure recurred seven times prior to this incident. The manufacturer was notified of the failure. The failure mileage was 113,000.”
NHTSA complaint #10909735, filed 2016-09, 113,000 miles“The contact owns a 2009 Mercury Mariner Hybrid. The contact stated that while driving approximately 60 MPH, the vehicle lost power and could not accelerate over 40 MPH. The failure recurred on one other occasion. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 75,000.”
NHTSA complaint #10748285, filed 2015-08, 75,000 milesEngine: other model years
Other parts of the 2009 Mercury Mariner Hybrid
8 complaintsVehicle speed control
6 complaintsBrakes
4 complaintsElectrical system
3 complaintsFuel system
3 complaintsElectronic stability control
1 complaintsTransmission and drivetrain
1 complaints
← All problems reported for the 2009 Mercury Mariner Hybrid
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology