2004 Mercury Mountaineer engine problems
The 2004 Mercury Mountaineer has 20 engine complaints filed with NHTSA — 7% of the year's total, and up sharply from the prior model year.
20
Engine complaints
7%
Share of year
1
Crash-involved
0
Related recalls
Engine complaints by year
What owners report
“TL*THE CONTACT OWNS A 2004 MERCURY MOUNTAINEER. WHILE HAVING THE VEHICLE SERVICED FOR ROUTINE MAINTENANCE AT AN AUTHORIZED DEALER THE CONTACT COULD SMELL A BURNING ODOR. THE CONTACT WAS TOLD THE ENGINE MANIFOLD WAS CRACKED AND LEAKING. THE VEHICLE WAS REPAIRED. A FEW DAYS LATER THE VEHICLE BEGAN…”
Common questions
How many engine complaints does the 2004 Mercury Mountaineer have?
NHTSA has 20 complaints about the 2004 Mercury Mountaineer engine — 7% of all complaints filed for that model year.
Related
Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.
Compiled by Sharon Ben-Moshe, Founder.