I've had plenty of Mercury in the bay over the years, and the engine complaints on these don't surprise me. 291 on the NHTSA record across 23 model-year entries (2005–2011) is not a fluke. The 2010 Mercury Milan leads the list but the pattern shows up across multiple years and models. Not a one-off. 4 crash reports on file. Not a high count, but the failure mode has put owners in the position to file. Repair exposure averages $3,100, which is meaningful money outside warranty. Across the 187 complaints reporting odometer mileage, the median failure lands at about 58,094 miles. Budget for a real pre-purchase inspection — compression and leakdown test, not just a code scan. Both are cheap and tell you what is left in the engine.
ProblemsByVin MERCURY / ENGINE
23 model-year entries · 2005–2011
Mercury engine problems
291 owner complaints filed with NHTSA against Mercury vehicles for engine issues. See engine across all makes →
Complaints
291
Recalls
0
Year-models
23
Avg fix
$3,100
4crashes
3fires
1injury
Worst-affected Mercury model-years for engine Top 23 by complaint volume
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
2010 Mercury Milan
64 complaints · ~$3,100 moderate
2006 Mercury Mountaineer
50 complaints · ~$3,100 moderate
2009 Mercury Mariner
22 complaints · ~$3,100 moderate
2010 Mercury Mariner
18 complaints · ~$3,100 moderate
2006 Mercury Montego
13 complaints · ~$3,100 severe
2005 Mercury Mariner
11 complaints · ~$3,100 moderate
2005 Mercury Montego
11 complaints · ~$3,100 moderate
2008 Mercury Mariner
9 complaints · ~$3,100 moderate
2007 Mercury Milan
9 complaints · ~$3,100 severe
2011 Mercury Mariner
8 complaints · ~$3,100 moderate
2005 Mercury Grand Marquis
8 complaints · ~$3,100 severe
2005 Mercury Mountaineer
8 complaints · ~$3,100 moderate
2008 Mercury Milan
7 complaints · ~$3,100 moderate
2007 Mercury Mountaineer
7 complaints · ~$3,100 moderate
2011 Mercury Milan
6 complaints · ~$3,100 moderate
2008 Mercury Grand Marquis
6 complaints · ~$3,100 moderate
2007 Mercury Grand Marquis
6 complaints · ~$3,100 moderate
2007 Mercury Mariner
6 complaints · ~$3,100 moderate
2006 Mercury Grand Marquis
6 complaints · ~$3,100 moderate
2006 Mercury Milan
5 complaints · ~$3,100 moderate
2008 Mercury Mountaineer
4 complaints · ~$3,100 moderate
2006 Mercury Mariner
4 complaints · ~$3,100 moderate
2005 Mercury Monterey
3 complaints · ~$3,100 moderate
Common questions
How many Mercury engine complaints are on file with NHTSA?
291 complaints across 23 model-year entries from 2005 to 2011. No active recall campaigns currently cover this category for Mercury.
Which Mercury model has the most engine complaints?
The 2010 Mercury Milan leads with 64 complaints in this category. Next: 2006 Mountaineer (50) and 2009 Mariner (22).
What does it cost to fix Mercury engine problems?
Independent shops average $3,100 for engine repairs across the Mercury lineup. Dealer pricing tends to run twenty to forty percent higher. Specific cost depends on the failure mode and parts availability.
Are there Mercury engine recalls?
No active NHTSA recalls currently cover engine issues on Mercury vehicles. The complaints are owner-reported and have not risen to a manufacturer recall.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA) public records database.
Editorial commentary written by Mark Driver, an independent contributor to ProblemsByVin
and not affiliated with Mercury.
Severity ratings derive from reported crashes, fires, injuries, and fatalities on the NHTSA complaint and recall record.
Repair cost averages reflect independent-shop pricing and may differ in your area.