"How reliable is the 2005 Mercury Mountaineer?"

"Based on 113 NHTSA complaints, the 2005 Mercury Mountaineer has a median complaint mileage of 48150 miles. The most common issue is Body."

"What are common problems with the 2005 Mercury Mountaineer?"

"The most frequently reported component in NHTSA complaints for the 2005 Mercury Mountaineer is Body, accounting for a significant portion of the 113 total complaints filed."

2005 Mercury Mountaineer: Reliability Data

Source: NHTSA — 113 complaints

113

Total Complaints

48,150mi

Median Mileage

Body

Top Issue

Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

34,177 25th Percentile

48,150 Median Mileage

98,935 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

Body

Automatic Transmission

Vehicle Speed Control

Power Train

Engine

Structure

Steering

Electrical System

Unknown Or Other

Engine

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"2005 - MERCURY MOUNTAINEER. THIS VEHICLE HAS WHAT I BELIEVE IS A BRAKING DESIGN FLAW. I HAVE BEE COMPLAINING ABOUT THIS BRAKE IN THIS VEHICLE FORM DAY ONE AS WE FIRST THOUGHT THAT THE BRAKE ROTORS HAD TIRE DRESSING ON THEM. THIS WAS NOT THE CASE. IT NOW APPEARS THAT THE BRAKE PEDAL IS DESIGN..."

"PURCHASED A NEW 2005 MERCURY MOUNTAINEER IN 7/31/2005 THE FIRST TIME THE CAR ACCELERATED WHEN THE BRAKES WERE APPLIED AND THE CAR HAD TO BE PUT IN NEUTRAL TO STOP. THE DEALER REPORTED THAT THERE WERE NO KNOWN FIXES FOR THIS PROBLEM AT THIS TIME. THE SECOND TIME WHILE PULLING INTO MY DRIVEWAY WHEN T..."

"HAD WARPED ROTORS WITHIN FIRST 2,000 MILES. FORD WOULD ONLY GROUND ROTORS BUT DEALER REPLACED THEM AT NO CHARGE. I HAVE ALSO EXPERIENCED A LOUD, THUMPING NOISE WHEN I AM MAKING A SHARP TURN TO LEFT OR RIGHT AT A VERY LOW SPEED. ALSO, OFTEN WHEN PUTTING CAR IN REVERSE MANY TIMES THERE IS A LARGE ..."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

When Were Complaints Filed?

Number of complaints by the year the issue occurred.

When Does Each Component Fail?

Median mileage at complaint for top components.

Body 19 complaints

25th: 44,000 mi Median: 66,000 mi 75th: 100,000 mi

Automatic Transmission 11 complaints

25th: 11,976 mi Median: 44,000 mi 75th: 49,500 mi

Vehicle Speed Control 9 complaints

25th: 44,274 mi Median: 93,000 mi 75th: 119,000 mi

Power Train 8 complaints

25th: 48,301 mi Median: 69,000 mi 75th: 113,000 mi

Engine 7 complaints

25th: 93,750 mi Median: 115,500 mi 75th: 127,500 mi

Where Are Complaints Coming From?

Top states by complaint count.

PA: 19 CA: 9 NJ: 9 NY: 8 MI: 7 CT: 7 FL: 6 OH: 6 TX: 6 MA: 4

Who Files Complaints?

9.7%

Original Owners

90.3%

Second+ Owners

Mercury Mountaineer — Other Years

See how this model compares across different model years.

Year	Complaints	Median Mileage	Top Issue	Crashes
1997	399	124,646	Tread/Belt	48
1998	298	79,500	Tires	29
1999	182	67,000	Tires	15
2000	164	81,000	Vehicle Speed Control	21
2001	32	40,000	Structure	3
2002	504	75,000	Automatic Transmission	19
2003	220	78,898	Body	8
2004	271	70,000	Body	20
2006	153	58,945	Automatic Transmission	9
2007	119	78,000	Seats	6
2008	156	65,000	Seats	4
2010	24	38,000	Service Brakes	0

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28