1999 Mercury Mountaineer: Reliability Data
When Do Complaints Happen?
Distribution of NHTSA complaints by vehicle mileage at time of report.
What Fails?
Most reported component issues from NHTSA complaints.
Severity Assessment
Sample Complaint Reports
"THE WINDSHIELD WIPERS COME ON SPONTANEOUSLY. THEY DO NOT OPERATE AT HIGH SPEED UNLESS I ACTIVATE MY TURN SIGNAL WHICH WILL ACTIVATE THE HIGH SPEED (BUT NOT ALWAYS). A RIGHT HAND TURN (WITH OR WITHOUT TURN SIGNAL) SEEMS TO TRIGGER THEM TO COME ON (BUT NOT ALWAYS). WHEN THEY DO COME ON SPONTANEOUSL..."
"WHEN TRAVELING AND UPON HITTING A BUMP IN THE RAOD, THE WINDSHIELD WIPERS COME ON INTERMITTENTLY, CAUSING THE BLADES TO WEAR. ALSO, AIR CONDITIONER IS BLOWING OUT HOT AIR. CONSUMER HAS CONTACTED THE DEALER, DEALER HAS YET TO REPLACE PARTS. PLEASE PROVIDE ANY FURTHER DETAILS. *AK"
"WHEN TRAVELING AND UPON HITTING A BUMP IN THE RAOD, THE WINDSHIELD WIPERS COME ON INTERMITTENTLY, CAUSING THE BLADES TO WEAR. ALSO, AIR CONDITIONER IS BLOWING OUT HOT AIR. CONSUMER HAS CONTACTED THE DEALER, DEALER HAS YET TO REPLACE PARTS. PLEASE PROVIDE ANY FURTHER DETAILS. *AK"
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.
Where Are Complaints Coming From?
Top states by complaint count.
Who Files Complaints?
Mercury Mountaineer — Other Years
See how this model compares across different model years.
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
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