The 2010 Mercury Grand Marquis has 24 owner complaints with NHTSA across 3 component categories. Use this checklist before you put money down — every item below is grounded in the actual failure pattern on this vehicle, not generic advice.
1
Inspect the steering
What to look for: Wandering on the highway, clunks when turning, slop in the wheel before the tires respond, power steering whine. (5 owner complaints on this vehicle
· typical repair $700 · failures cluster ~48,009 mi)
On the test drive: On a smooth highway, take hands off briefly (when safe) — vehicle should track straight. Pulling left or right means alignment or worn front-end parts.
What to look for: Paint mismatch between panels (prior accident), rust on rocker panels and wheel wells, door alignment gaps that don't match side-to-side, weatherstrip wear. (3 owner complaints on this vehicle
· typical repair $1,500 · failures cluster ~4,137 mi)
What to look for: Dim or flickering dash lights at idle, slow window operation, intermittent infotainment glitches, parasitic battery drain (dead battery after a few days parked). (3 owner complaints on this vehicle
· typical repair $850 · failures cluster ~33,333 mi)
On the test drive: Cycle through every electronic accessory during the drive — heated seats, defrosters, climate fan on max, cruise control. Glitches show up under load.
The seller's transparency on these tells you what kind of seller you're dealing with.
Inspection items derived from 24 owner complaints and 0 active recall campaigns filed
with NHTSA on the 2010 Mercury Grand Marquis. Category-specific guidance is written by ProblemsByVin contributors with ASE-certified mechanic
review. This checklist is meant to surface known patterns — it doesn't replace a paid pre-purchase inspection by a
qualified shop, which we recommend for any used vehicle priced over a few thousand dollars.