"How reliable is the 2004 Mercury Mountaineer?"

"Based on 271 NHTSA complaints, the 2004 Mercury Mountaineer has a median complaint mileage of 70000 miles. The most common issue is STRUCTURE:BODY."

"What are common problems with the 2004 Mercury Mountaineer?"

"The most frequently reported component in NHTSA complaints for the 2004 Mercury Mountaineer is STRUCTURE:BODY, accounting for a significant portion of the 271 total complaints filed."

2004 Mercury Mountaineer: Reliability Data

Source: NHTSA — 271 complaints

271

Total Complaints

70,000mi

Median Mileage

STRUCTURE:BODY

Top Issue

Crash Reports

When Do Complaints Happen?

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

44,175 25th Percentile

70,000 Median Mileage

99,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

STRUCTURE:BODY

POWER TRAIN:AUTOMATIC TRANSMISSION

POWER TRAIN

VEHICLE SPEED CONTROL

STRUCTURE:BODY:HATCHBACK/LIFTGATE

STRUCTURE:BODY:HATCHBACK/LIFTGATE:HINGE AND ATTACHMENTS

ELECTRICAL SYSTEM

UNKNOWN OR OTHER

AIR BAGS

STRUCTURE

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"WHILE DRIVING, THE ENGINE CHECK LIGHT ILLUMINATED ON THE DASHBOARD. CONSUMER TOOK THE VEHICLE TO THE DEALERSHIP (4) TIMES, BUT THE PROBLEM STILL EXISTED. *AK *JB"

"ON JANUARY 01, 2004, WHILE DRIVING 25-30 MPH OVER ICY ROADS THE CONSUMER LOST CONTROL OF THE VEHICLE. THE VEHICLE FLIPPED OVER TWICE YET THE AIR BAGS DID NOT DEPLOY AT ANY TIME. PLEASE PROVIDE ANY ADDITIONAL INFORMATION. *NM"

"CONSUMER NOTICED THAT WHILE THE DVD/ TELEVISION SET WAS ENGAGED THE REAR MIRRORS BECAME INOPERATIVE. VEHICLE WAS TAKEN TO THE DEALER FOR INSPECTION, AND MECHANIC INFORMED CONSUMER THAT THE PROBLEM COULD NOT BE FIXED BECAUSE IT WAS DESIGNED THAT WAY. *AK *NM"

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

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