Is the 2008 Mercury Mariner a bad year?
461 owner complaints to NHTSA. Transmission complaints: 66, 6× a quiet Mariner year.
Keep it, but watch the transmission
The transmission draws 6× the complaints of a quiet Mariner year, spread over 46k–118k miles, so there's no single mileage to plan around.
The verdict moves with mileage: the same car reads differently at 30,000 and at 150,000 miles.
What 2008 Mariner owners report, by mileage
Each system owners named in five or more complaints, with the mileage range where the middle half of those complaints were filed. Read at 68,000 miles.
| SYSTEM | COMPLAINTS | MIDDLE HALF FILED AT | TYPICAL US REPAIR BILLS |
|---|---|---|---|
| Transmission and drivetrainSTANDS OUT | 66 (14%) | 46k–118k miles · around this mileage | CV axle / CV joint replacement (one side) $300–$1,500 · Automatic transmission replacement $2,500–$7,000 |
| SteeringSTANDS OUT | 297 (64%) | 95k–149k miles · ahead | Steering rack and pinion replacement $700–$2,100 |
| Speed control | 31 (7%) | 50k–98k miles · around this mileage | — |
| Engine | 19 (4%) | 46k–99k miles · around this mileage | Valve cover gasket replacement $110–$500 · Timing chain replacement $1,000–$4,000 |
| Fuel system | 10 (2%) | 57k–108k miles · around this mileage | Fuel pump replacement $220–$1,500 · Fuel injector replacement (one injector) $300–$1,200 |
| Brakes | 35 (8%) | 70k–125k miles · ahead | Brake pad replacement (one axle) $115–$390 · Brake pads and rotors replacement (one axle) $200–$1,084 |
| Electrical system | 27 (6%) | 78k–135k miles · ahead | 12-volt battery replacement $100–$400 · Starter motor replacement $350–$1,200 |
| Air bags | 8 (2%) | too few with a mileage | — |
| Body structure | 5 (1%) | too few with a mileage | — |
| Stability control | 5 (1%) | too few with a mileage | — |
| Suspension | 5 (1%) | too few with a mileage | — |
| Tires | 5 (1%) | too few with a mileage | — |
Bills are typical US ranges from the sources named in the tool (J.D. Power, Kelley Blue Book, CarParts.com and others), printed only for systems that stand out or sit at or ahead of 68,000 miles. Not a quote.
What owners reported alongside their complaints
Of 461 complaints: 9 mention a crash · 5 report an injury · 10 say the car was towed.
No complaints in the last 12 months; the newest was filed in Mar 2025.
Counts of what owners wrote in their complaints, not verified by anyone.
In owners' own words
Driving in traffic, when vehicles transmission disengaged. Depressing the accelerator only revved the engine, but no forward motion.
My 08' Mercury mariner has only 46,000 miles on it and now needs a new transmission. When I got into my car and tried to put it in reverse, the car would not move backwards.
Ford's recall "Code 14S19" On 2005-2008 mariner hybrids and escape hybrids should cover all of these hybrids but it has exceptions!
Unedited excerpts from complaints filed with NHTSA, chosen by mileage (nearest 68,000 miles), not by content. Unverified.
Recalls for the 2008 Mercury Mariner: 4
The affected vehicles are equipped with either a 2.3L or 3.0L engine and have had their CD4E transmission replaced with remanufactured one that was rebuilt between June 11, 2015 through July 15, 2015. These service repair part transmissions have a shift lever bolt that may not be properly tightened. If the shift lever disengages from the transmission, a driver may be unable to shift gear positions and the indicated shift position may not represent the gear position the vehicle is in.
The affected wheel bearings have incorrect dimensions of a 42mm bore, 76mm outer dimension, and 39mm width, instead of a 42mm bore, 78mm outer dimension and a 45mm width. Use of an incorrectly sized wheel bearing can adversely affect the braking and steering of the vehicle, increasing the risk of a crash.
The coolant pump for the hybrid system may fail resulting in the hybrid electronics overheating. If the hybrid electronics system overheats, it may shut down the powertrain, resulting in a stall-like condition, increasing the risk of a crash.
The affected vehicles have a steering torque sensor that may not be able to properly detect driver steering input. As a result, the system could remove the Electric Power Steering (EPS) assist. If power steering assist is lost, greater driver effort would be required to steer the vehicle at low speeds, increasing the risk of a crash.
A recall may cover only some cars of a model year; the campaign size counts every model and year it lists. Enter your VIN at nhtsa.gov/recalls: dealers fix open recalls free.
Service bulletins from Mercury: 12
Repair instructions Mercury sent its dealers for symptoms seen in the shop on the 2008 Mercury Mariner. Ask a dealer or mechanic for a bulletin by its number.
Replacing the original equipment SYNC/Navigation system with either an aftermarket SYNC/Navigation kit or modifying original SYNC/Navigation parts to provide…
The wrench light will illuminate when 4X4 function is inoperative due to active torque coupling solenoid coil wiring being broke…
Ford/mercury: if diagnostic code B2278 is stored in power steering control module (PSCM)…
There is excessive engine or exhaust noise, or an exhaust odor due to an exhaust leak
NHTSA defect investigations: 2
Loss of power steering while driving
Tire valve cracking
Neighbouring years
2007 Mariner: 33 complaints, keep it · 2009 Mariner: 315 complaints, keep it, but watch the engine.
Every Mercury Mariner year
2005 · 2006 · 2007 · 2008 · 2009 · 2010 · 2011 · All Mariner years side by side
Other Mercury models: Mercury Cougar · Mercury Grand Marquis · Mercury Mariner Hybrid · Mercury Milan · Mercury Montego · Mercury Monterey · Mercury Mountaineer · Mercury Sable. All makes and models.
Questions
Is the 2008 Mercury Mariner a bad year?
461 owner complaints to NHTSA. Transmission complaints: 66, 6× a quiet Mariner year. At 68,000 miles the tool says: Keep it, but watch the transmission. The transmission draws 6× the complaints of a quiet Mariner year, spread over 46k–118k miles, so there's no single mileage to plan around.
What are the most common problems with the 2008 Mercury Mariner?
By owner complaints to NHTSA: transmission and drivetrain (66), steering (297), speed control (31), engine (19), fuel system (10). Half of the transmission complaints were filed between 46k–118k miles.
How many recalls does the 2008 Mercury Mariner have?
4 recall campaigns list this model year: Transmission and drivetrain (NHTSA 15V-606), Suspension (NHTSA 15E045000), Hybrid system (NHTSA 14V-526), Steering (NHTSA 14V-284). A recall may cover only some cars; check by VIN at nhtsa.gov/recalls.
Method: counts of unverified owner complaints filed with NHTSA, compared only with other years of the same model (sales volumes are unknown, so no failure rate is computed). A system stands out at 40+ complaints and at least twice the model's quiet (lower-quartile) year, or twice the share across every vehicle of that model year. The mileage range is the 25th to 75th percentile of the mileages owners reported. Data received by NHTSA through November 5, 2026. Repair prices are typical US ranges from named sources, not quotes. Not a diagnosis and not financial advice. PulsCar is not affiliated with NHTSA. Check this car at your own mileage.