The 2006 Mercury Grand Marquis has 142 owner complaints with NHTSA across 6 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 airbags
What to look for: Anything that looks, sounds, or smells different from peer vehicles of the same year and trim. (36 owner complaints on this vehicle
· typical repair $1,100 · failures cluster ~70,765 mi)
What to look for: Cruise that won't set, drops out on small inclines, jerky speed adjustment. (29 owner complaints on this vehicle
· typical repair $600 · failures cluster ~59,632 mi)
What to look for: Wandering on the highway, clunks when turning, slop in the wheel before the tires respond, power steering whine. (12 owner complaints on this vehicle
· typical repair $700 · failures cluster ~87,669 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: Anything that looks, sounds, or smells different from peer vehicles of the same year and trim. (10 owner complaints on this vehicle
· typical repair $500 · failures cluster ~79,011 mi)
What to look for: Pulsing brake pedal, pulling to one side when braking, squealing or grinding, soft pedal that goes to the floor. (8 owner complaints on this vehicle
· typical repair $450 · failures cluster ~17,900 mi)
On the test drive: Hard brake from 40 mph in a safe spot — pedal should be firm, stop should be straight. A pulse means warped rotors ($300–$600).
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). (7 owner complaints on this vehicle
· typical repair $850 · failures cluster ~54,314 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 142 owner complaints and 0 active recall campaigns filed
with NHTSA on the 2006 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.