Mercury Mariner problems
315 owner complaints with NHTSA, no active recalls. Here's where owners say it breaks.
Solid reliability overall. Common issues are concentrated in a few systems.
Worth owning if you verify the specific issues below before you buy.
- Reliability score 7.2/10 — around the segment average
Our read of the federal NHTSA complaint and recall record for this exact year and model — not a substitute for a pre-purchase inspection. How we score.
Buying a used 2009 Mercury Mariner? Check these first
Here's what this model is known to do — so you can inspect for it, price it in, or make the seller fix it before you sign.
What to inspect on this specific car
- steering — 167 owner reports · tends to show around 121,543 mi · ~$700 to fix
- powertrain — 39 owner reports · tends to show around 69,444 mi · ~$2,500 to fix
- cruise control — 24 owner reports · tends to show around 74,771 mi · ~$600 to fix
- engine — 22 owner reports · tends to show around 59,676 mi · ~$3,100 to fix
⚠ The one to take seriously: brakes is flagged severe on this model , showing up around 105,463 mi. Inspect it closely on a test drive.
Recalls to confirm are done
Run the VIN from the listing — no active recalls on this model right now, but confirm none were opened after this car was built.
Verdict for buyers: 7.2/10 model. The priciest documented failure is engine (~$3,100) — get the seller's service records for it or inspect closely. Otherwise an average-risk used buy at a fair price.
We tell you what this model is known for and what to inspect — a vehicle-history report tells you what this exact car has been through. Smart buyers get both.
See the full pre-purchase inspection checklist →Ask anything about your 2009 Mercury Mariner
A noise, a warning light, a repair quote, "should I buy this?" — get an answer grounded in this vehicle's actual NHTSA record, not generic advice.
Answers use this vehicle's NHTSA complaint & recall record — owner-reported and unverified, not a diagnosis. Verify anything safety-critical with a mechanic.
Top trouble spots 8 categories with 3+ complaints
Your road ahead on this 2009 Mercury Mariner
When owners report each system failing, in actual miles — so you can see what's likely behind you, what's due around now, and what to budget for next. Enter your mileage to mark where you are.
- ~67,480 miengine~$3,100
- ~69,000 mipowertrain~$2,500
- ~70,000 mifuel system~$1,200
- ~71,000 micruise control~$600
- ~98,291 mielectrical~$850
- ~116,175 mibrakes~$450
- ~120,000 misteering~$700
"Typical" = median owner-reported failure mileage from the NHTSA complaint record for this exact year and model. Not a maintenance schedule — a heads-up on where this model's failures cluster.
What owners are saying recent NHTSA-filed complaints · verbatim
The contact owns a 2009 Mercury Marnier. The contact stated while driving at an undisclosed speed, the steering wheel started to shake. The electric power steering (EPS) warning light was illuminated. The vehicle was taken to an independent mechanic where it was diagnosed that…
Tl* the contact owns a 2009 mercury mariner. While driving 35 MPH, the steering wheel seized without warning. The vehicle was taken to an independent mechanic where it was diagnosed that the steering column failed and needed to be replaced. The vehicle was repaired. The…
When pulling up to a stop sign the car just stopped next time coming off interstate to stop the vehicle kinda of lunged the next tine it just tried to stall had to put in neutral and keep foot on gas to keep it running. *tr
While driving the mariner at 45 MPH on a busy street, the engine went into limp mode, lost all acceleration and slowed to 5 MPH. I was nearly rear-ended by the truck behind me and was forced to pull up onto a sidewalk, damaging my tire. Pulled the codes on the car and got a…
Estimate your repair exposure
Drag to your current mileage. Numbers are derived from this vehicle's complaint history.
Common questions
Is the 2009 Mercury Mariner reliable?
Mostly yes. With a reliability score of 7.2 out of 10 based on 315 owner complaints filed with NHTSA, the 2009 Mercury Mariner is generally a sound vehicle. The areas to watch are listed in the top problem section above — most are budget items, not deal-breakers.
Should you avoid the 2009 Mercury Mariner?
The 2009 Mercury Mariner is acceptable, with specific caveats. Worth owning if you verify the specific issues below before you buy. The record behind that call: Reliability score 7.2/10 — around the segment average. This is our read of the federal complaint and recall data — not a substitute for a pre-purchase inspection.
What should I check before buying a used 2009 Mercury Mariner?
Inspect the steering first — it's the most-reported issue on this model, with 167 owner complaints filed. Typical failure occurs around 121,543 miles. Average repair cost runs about $700 at an independent shop. Also confirm any open recalls have been completed by running the VIN, and ask for service records covering the problem areas listed above.
Is the 2009 Mercury Mariner a good used car to buy?
It scores 7.2 out of 10 on our NHTSA-based read of 315 owner complaints. The main thing to watch is steering. Typical failure occurs around 121,543 miles. Priced fairly and clean on inspection, it's a reasonable used buy. Our data covers what this model is known for — pair it with a vehicle-history report on the VIN to see what that specific car has been through.
What's the most common problem on the 2009 Mercury Mariner?
Based on NHTSA records, the most-reported issue is steering, with 167 complaints filed. Typical failure occurs around 121,543 miles. Average repair cost runs about $700 at an independent shop.
What's the most expensive thing that goes wrong?
The steering is one of the costlier repair items. Average repair cost runs about $700 at an independent shop. Typical failure occurs around 121,543 miles. Catching early warning signs can sometimes extend life by 20–30,000 miles.
How do I check if my Mercury Mariner has open recalls?
Paste your VIN into the decoder at the top of this page. We pull live from NHTSA, so you'll see exactly which campaigns apply to your vehicle and whether the dealer has logged the fix. Recall repairs are always free regardless of mileage or warranty status.
Is an extended warranty worth it on a 2009 Mercury Mariner?
Math is straightforward: a quality service contract runs $1,800–3,500 over 3 years. With 315 complaints on file and the costliest repair averaging $700, one major failure more than pays for it. The catch is reading the contract — many providers exclude wear items and require pre-authorization, so cheaper plans are not always better value.