2005 Mercury Grand Marquis Exterior Lighting Problems
NHTSA component category: EXTERIOR LIGHTING · data through 07/12/2026
Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
How exterior lighting ranks on this vehicle
Share of the 487 complaints citing each category; one complaint can cite several. Full breakdown on the 2005 Mercury Grand Marquis overview page.
What owners report
“THE CONTACT OWNS A 2005 MERCURY GRAND MARQUIS. THE CONTACT WAS DRIVING 65 MPH WHEN THE HEADLIGHTS ILLUMINATED UNEXPECTEDLY AND FAILED TO WORK PROPERLY. THE…”NHTSA complaint 10442499 — filed 01/05/2012
“THE HEADLIGHTS DO NOT TURN ON AUTOMATICALLY OR MANUALLY, DAY OR DARK AT NIGHT, UNLESS YOU USE THE BRIGHT LIGHTS. HE LIGHTS WILL NOT TURN…”NHTSA complaint 10430653 — filed 10/18/2011
“THE CONTACT OWNS A 2005 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT THE HEADLIGHTS AND HIGH BEAM HEADLIGHTS FAILED WITHOUT WARNING. THE CONTACT WENT TO…”NHTSA complaint 10430232 — filed 10/14/2011
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Exterior Lighting complaints by year filed
Frequently asked questions
Does the 2005 Mercury Grand Marquis have exterior lighting problems?
Exterior Lighting is the most-reported problem area on the 2005 Mercury Grand Marquis: 260 of 487 complaints on file (53.4%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 2005 Mercury Grand Marquis have in total?
487 complaints were on file with NHTSA as of 07/12/2026. Across all categories, 24 involved a crash, 5 involved a fire, 21 reported injuries, and none reported deaths.
What does NHTSA's exterior lighting category include?
NHTSA assigns each complaint to standard component categories; this page reports the EXTERIOR LIGHTING category exactly as NHTSA defines and records it.
