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2002 Mercury Mountaineer Recalls, Problems & Maintenance

The 2002 Mercury Mountaineer has no open NHTSA recalls. Owners report 8 recurring issue clusters, led by “Automatic transmission shifting and slipping failures.” Ford closed Mercury in 2011, which is good news for owners: nearly every part is a Ford part. The Grand Marquis is a Crown Victoria, the Sable is a Taurus, the Mountaineer is an Explorer, the Milan is a Fusion, and the Mariner is an Escape. Any competent Ford shop can work on one, and parts pricing follows the Ford volume. Two models break the pattern. The Villager is a rebadged Nissan Quest with a Nissan V6 and a timing belt that must be replaced on schedule. The Mariner Hybrid carries the same high-voltage battery and continuously variable transaxle as the Escape Hybrid, so it needs a shop with hybrid training. Cars from roughly 2007 on use Ford's Intelligent Oil-Life Monitor. Earlier ones run fixed intervals.

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No open recalls on file. NHTSA lists no unrepaired safety recalls for this year, make and model. A recall can be issued at any time, and a specific car can still have one open — check yours by VIN at nhtsa.gov/recalls.

Known issues & problems for this vehicle

What drivers and federal regulators have officially reported about the 2002 Mercury Mountaineer.

Reported to NHTSA

Automatic transmission shifting and slipping failures

POWER TRAIN

59 NHTSA complaints · 2007-07 → 2016-11

“WHILE DRIVING THE "OD" LIGHT STARTED FLASHING AND THE VEHICLE WOULD NOT SHIFT FROM 2ND TO THIRD GEAR. IT WOULD JUST REV UP”
— Owner report, NHTSA ODI #10681939
“WHILE DRIVING (MPH UNKNOWN) THE VEHICLE WOULD NOT ACCELERATE. THE MECHANIC STATED THAT THE TRANSMISSION BAND BROKE AND WAS THE CAUSE OF THE FAILURE”
— Owner report, NHTSA ODI #10228949
“MY TRANSMISSION FAILED WHILE I WAS DRIVING ON THE FREEWAY WITH MY CHILD IN THE CAR. THIS CAUSE MY CAR TO "BUCK" AND COME TO ALMOST COMPLETE STOP”
— Owner report, NHTSA ODI #10278241

Read all complaints on NHTSA →

Gear shift lever breaking off at steering column

STEERING, POWER TRAIN

24 NHTSA complaints · 2008-10 → 2016-04

“WHILE ATTEMPTING TO PUT THE VEHICLE IN PARK, THE GEAR SHIFTER SNAPPED IN HALF. IT IS CURRENTLY ATTACHED BY JUST A WIRE”
— Owner report, NHTSA ODI #10446752
“THE SHIFT LEVER SNAPPED OFF, IN REVERSE, WHILE ATTEMPTING TO PUT INTO PARK. THE LEVER BROKE IN SUCH A WAY THAT THE VEHICLE WAS STUCK IN GEAR WITH NO MEANS TO PUT IN PARK”
— Owner report, NHTSA ODI #10486594
“SHIFTING GEARS FROM REVERSE TO DRIVE WHEN GEAR SHIFTER BROKE OFF IN MY HAND LEAVING CAR STUCK IN REVERSE WITH NO WAY OF CHANGING GEARS”
— Owner report, NHTSA ODI #10315635

Read all complaints on NHTSA →

Liftgate panel cracking below rear glass

STRUCTURE

15 NHTSA complaints · 2007-07 → 2014-12

“THE CONTACT STATED THE REAR LIFT GATE ON THE VEHICLE WAS CRACKED FROM THE TOP TO THE BOTTOM OF THE LIFT GATE”
— Owner report, NHTSA ODI #10432713
“UPPER REAR LIFT GATE BELOW THE REAR GLASS WINDOW WAS FOUND WITH SEVERAL CRACKS ON A COLD WINTER MORNING. NO RECENT IMPACTS OTHER THAN NORMAL REAR HATCH CLOSINGS”
— Owner report, NHTSA ODI #10262595
“THE TAILGATE DEVELOPED A CRACK BETWEEN THE EMBLEM AND THE REAR GLASS LIFT. SINCE THIS CRACK HAS DEVELOPED, THE DOOR AJAR LIGHT HAS STAYED ON CONSISTENTLY, CAUSING THE INTERIOR LIGHT TO STAY ON, DRAINING THE BATTERY, WHICH HAD TO BE REPLACED”
— Owner report, NHTSA ODI #10263178

Read all complaints on NHTSA →

Rear coil spring fracture

SUSPENSION

11 NHTSA complaints · 2007-08 → 2010-02

“THE CONTACT STATED THAT DURING ROUTINE INSPECTION, A TECHNICIAN CONCLUDED THAT THE TWO REAR COIL SPRINGS HAVE FRACTURED WITHOUT ANY PRIOR WARNINGS”
— Owner report, NHTSA ODI #10285552
“WHILE DRIVING ON A HIGHWAY AT ABOUT 65MPH A LOUD BANG WAS HEARD AND MY 2002 MERCURY MOUNTAINEER SWERVED TO THE RIGHT ALMOST HITTING ANOTHER CAR”
— Owner report, NHTSA ODI #10199358
“BOTH REAR COIL SPRINGS WERE BROKEN. BOTH HAD BEEN WEAKENED DUE TO CORROSION BEFORE THEY BROKE”
— Owner report, NHTSA ODI #10267189

Read all complaints on NHTSA →

Spark plug ejection from cylinder head

ENGINE AND ENGINE COOLING

7 NHTSA complaints · 2008-03 → 2015-07

“I FOUND THAT ONE OF THE SPARK PLUGS HAD BLOWN OUT OF THE ENGINE, WHICH ALLOWED FUEL TO ESCAPE INTO THE ENGINE COMPARTMENT”
— Owner report, NHTSA ODI #10285210
“#2 SPARKPLUG BLEW OUT FROM CYLINDER HEAD. IT SOUNDED LIKE A BLOWN EXHAUST GASKET”
— Owner report, NHTSA ODI #10220228
“ADD TO YOUR LIST OF COMPLAINTS OF SPARK PLUG EJECTION FROM THE ALUMINUM HEAD”
— Owner report, NHTSA ODI #10244501

Read all complaints on NHTSA →

Wheel bearing and hub failure

SUSPENSION

6 NHTSA complaints · 2007-08 → 2012-10

“RIGHT FRONT WHEEL BEARING WENT OUT AND WAS REPLACED AT 50,000 MILES. I JUST REPLACED THE SAME WHEEL BEARING AT 100,000 MILES”
— Owner report, NHTSA ODI #10342986
“2002 MERCURY MOUNTAINEER (FORD EXPLORER) WITH WHEEL BEARING/HUB FAILURE ON ALL 4 WHEELS AT DIFFERENT MILEAGE INTERVALS”
— Owner report, NHTSA ODI #10237696
“IN THE PAST 4 YEARS WE HAVE REPLACED THE REAR BEARINGS 5 TIMES AND NOW FORD MOTOR COMPANY WILL NOT HONOR THE WARRANTY”
— Owner report, NHTSA ODI #10285600

Read all complaints on NHTSA →

Rear liftgate glass shattering and lift cylinder detachment

VISIBILITY

13 NHTSA complaints · 2007-10 → 2020-02

“THE VEHICLE WAS PARKED WHEN THE CONTACT OPENED THE REAR LIFTGATE WINDOW AND THE HINGE FRACTURED FROM THE VEHICLE. THE WINDOW FELL ONTO THE CONTACT AND ANOTHER INDIVIDUAL RESULTING IN TWO INJURIES”
— Owner report, NHTSA ODI #10393076
“WHEN HE WENT TO CLOSE THE WINDOW, EVEN BEFORE HE ACTUALLY CLOSED IT, THE WINDOW EXPLODED AND SHATTERED EVERYWHERE”
— Owner report, NHTSA ODI #10558382
“THE ADHESIVE HAS WORKED LOOSE AND THE CYLINDER WILL NOT HOLD OPEN THE GLASS; THE GATE HAS FALLEN AND WILL CONTINUE TO DO SO, RESULTING IN GLASS BREAKAGE”
— Owner report, NHTSA ODI #10269508

Read all complaints on NHTSA →

Air bag non-deployment, deployment and warning light

AIR BAGS

10 NHTSA complaints · 2007-07 → 2019-03

“THE AIR BAGS ON THE 2002 MERCURY MOUNTAINEER DID NOT DEPLOY”
— Owner report, NHTSA ODI #10218774
“WHILE DRIVING ON A STRAIGHT ROAD GOING 20-25 MPH, MY DRIVER AND PASSENGER SIDE/CURTAIN AIRBAGS DEPLOYED FOR NO REASON”
— Owner report, NHTSA ODI #10959878
“PASSENGER AIR BAG WARNING LIGHT ACTIVATED / WILL NOT GO OUT”
— Owner report, NHTSA ODI #10227186

Read all complaints on NHTSA →

Issues on other model years

Source: NHTSA Office of Defects Investigation (ODI). Complaint data refreshed Sep 20, 2026. Investigation data refreshed Sep 20, 2026.

We display NHTSA's record with attribution; we don't editorialize on what these complaints mean for any specific vehicle.

Raw data + downloads for this vehicle →

Essential maintenance

Critical for safety and preventing major damage

Engine Oil & Filter

Every 5,000 mi

On 2007 and later models, follow the Intelligent Oil-Life Monitor and change at least once a year. Earlier cars were specified at 5,000 miles under Ford's severe schedule, which covers most real driving. Given the age of these engines, 5,000 miles is the sensible ceiling either way.

Estimated cost — typical U.S. ranges

Dealer

~$120–$160

Shop

~$85–$115

DIY

~$25–$55

Full synthetic costs more than conventional. 5-quart 0W-20 + filter is the typical bill.

Tire Rotation

Every 5,000 mi

Rotate every 5,000 miles, and every oil change on the rear-drive Grand Marquis and Marauder, where the rear tires wear faster. Check sidewall date codes as well, since age retires tires on these cars before tread depth does.

Estimated cost — typical U.S. ranges

Dealer

~$85

Shop

~$60

DIY

Free

Often free at the shop where you bought the tires — worth asking before paying.

Brake Inspection

Every 7,500 mi

Inspect pads, rotors, hoses, and lines at every service. The Panther platform cars under the Grand Marquis are heavy, and rear rotors and parking brake hardware seize on cars that sit.

Estimated cost — typical U.S. ranges

Dealer

~$85

Shop

~$60

DIY

Free

Most shops do this free as a courtesy with any service. Don't pay separately if you can avoid it.

Brake Fluid

Every 30,000 mi

Replace every 3 years. Ford did not always publish this as a hard interval, but water in old fluid is the reason aging calipers drag and ABS units fail.

Estimated cost — typical U.S. ranges

Dealer

~$180–$200

Shop

~$125–$140

DIY

~$10–$25

DOT 3 or 4 — match the cap. Vacuum bleeders make this a one-person DIY.

Timing Belt (Villager only)

Every 105,000 mi

This applies only to the 1993 to 2002 Villager, which uses a Nissan 3.0 or 3.3 V6 with a rubber timing belt due at 105,000 miles. Every other Mercury in this catalog uses a timing chain that is not a scheduled item. If you drive a Villager and cannot document the belt, budget for it now.

Estimated cost — typical U.S. ranges

Dealer

~$935–$1175

Shop

~$655–$825

DIY

Pro only

On interference engines, a snapped belt destroys valves. Worth doing on schedule. Bundle water pump + tensioner — labor is already there.

Important maintenance

Keeps your vehicle running smoothly and efficiently

Automatic Transmission Fluid

Every 50,000 mi

Drain and fill every 50,000 miles. Fluid type matters here: Mercon V for most of the lineup, Mercon LV on later models, and the Villager takes Nissan-spec fluid. The wrong fluid causes shudder and eventually failure.

Estimated cost — typical U.S. ranges

Dealer

~$330–$500

Shop

~$235–$355

DIY

~$60–$180

Some sealed transmissions have no dipstick — fill is precise and best left to a shop. Many drivers can still DIY drain-and-fill.

Spark Plugs

Every 100,000 mi

100,000 miles on platinum plugs. On the 4.6 V8 in the Grand Marquis, plugs left in aluminum heads for a decade can seize and break on removal. A shop that soaks them and works them out cold is worth the extra labor hour.

Estimated cost — typical U.S. ranges

Dealer

~$285–$390

Shop

~$200–$275

DIY

~$25–$100

Iridium plugs cost more but last 100k+ miles. V6/V8 access varies wildly — some are tough.

Engine Air Filter

Every 30,000 mi

Replace every 30,000 miles, or sooner on dusty roads. Straightforward on every model in the lineup.

Estimated cost — typical U.S. ranges

Dealer

~$60–$95

Shop

~$45–$70

DIY

~$15–$40

5-minute job on most cars; the airbox lid usually has clips, no tools needed.

Recommended maintenance

Extends the life of your vehicle and improves comfort

Coolant Replacement

Every 100,000 mi

Every 5 years on a car this age. Ford used a gold or yellow long-life coolant on later models and green on earlier ones. Have the shop pressure test at the same time. The plastic intake manifold crossover on some 1996 to 2001 4.6 V8s is a known coolant leak point.

Estimated cost — typical U.S. ranges

Dealer

~$285–$330

Shop

~$200–$235

DIY

~$25–$60

Use the manufacturer-specified coolant — wrong color/chemistry can damage the cooling system.

Rear Axle Fluid (rear-drive and 4WD models)

Every 100,000 mi

Applies to the Grand Marquis, Marauder, Mountaineer, and any four-wheel-drive model. Change every 100,000 miles, or every 30,000 if you tow. Limited-slip axles need the friction modifier added.

Estimated cost — typical U.S. ranges

Dealer

~$150–$195

Shop

~$105–$135

DIY

~$20–$50

Battery & Charging System Test

Every 25,000 mi

Test annually. On the Mariner Hybrid this is the 12-volt battery only. The high-voltage pack is a separate system and should be checked by a hybrid-trained shop.

Estimated cost — typical U.S. ranges

Dealer

~$225–$390

Shop

~$160–$280

DIY

~$130–$250

Most auto-parts stores test and install batteries free with purchase. Skip the dealer markup.

Fatal crash history & reported problems

Occupant deaths in fatal crashes (FARS)

170 crashes 1990–2024

How the 170 occupant deaths break down

96

driver deaths

74

passenger deaths

170

occupant deaths

Crash years covered: 1990–2024 This model year first appears in 2001 crashes. Older models have had more years on the road to appear in these crashes, so a higher count here does not by itself mean a vehicle is less safe.

FARS counts every occupant death in a fatal crash, whatever the cause — it does not mean the vehicle was at fault or defective. Counts are not adjusted for how many of each vehicle are on the road. How to read this number

FARS 2024 data is an annual report file. NHTSA revises these records when the final file is published, so this count can change.

Why we show driver deaths too

Every vehicle has exactly one driver seat, so driver deaths line up fairly when you compare one model to another. Occupant deaths include passengers, so a three row SUV can show a higher number than a two seat car simply because it carries more people.

Both figures are plain counts, not rates. A rate would need to know how many of each vehicle are on the road, and that registration data is not public, so we do not publish rates or scores of any kind.

IIHS publishes driver death rates using this same driver only idea, paired with a registered vehicle years denominator we do not have. Their rates and these counts answer different questions, so do not read either number here as a safety rating.

Owner-reported problem signals

Separate from the federal fatality data above: complaints owners filed with NHTSA about this year and model. These are reports of problems, unverified, and are counted here only as signals.

17

complaints mentioning a crash

7

complaints mentioning a fire

Reviewed known issues for this vehicle

Typical U.S. ranges. Actual quotes vary by shop, parts choice, and vehicle condition.

How we estimate: Dealer = OEM parts × 1.4 + labor × $165/hr. Shop = parts + labor × $115/hr. DIY = parts only.

This maintenance schedule for the 2002 Mercury Mountaineer reflects Mercury's published service intervals and the Intelligent Oil-Life Monitor system. Your actual service needs may vary based on driving conditions, climate, and vehicle usage. Always consult your owner's manual for model-specific recommendations.

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