2009 Mercury Mariner Electrical System Problems
NHTSA component category: ELECTRICAL SYSTEM · data through 07/14/2026
Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
How electrical system ranks on this vehicle
Share of the 315 complaints citing each category; one complaint can cite several. Full breakdown on the 2009 Mercury Mariner overview page.
What owners report
“WHILE DRIVING THE VEHICLE'S DASH LIGHTS AND HEAD LAMPS GO BLACK FOR 2-5 MINUTES BEFORE COMING BACK ON. MY CAR WAS TAKEN TO THE DEALER…”NHTSA complaint 10568954 — filed 03/13/2014
“MY MERCURY MARINER 2009 HAS HAD ISSUES FOR THE PAST YEAR IN REGARDS TO THE VEHICLE UNEXPECTEDLY GOES INTO "LIMP HOME MODE" AT REDUCED POWER…”NHTSA complaint 10547431 — filed 10/09/2013
“THIS IS THE FOURTH TIME SINCE PURCHASING THE CAR AT CARMAX IN OCTOBER 2012 THAT THE CAR HAS "SHUT OFF" WITHOUT WARNING AT LOW SPEED…”NHTSA complaint 10513107 — filed 05/22/2013
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Electrical System complaints by year filed
Frequently asked questions
Does the 2009 Mercury Mariner have electrical system problems?
Electrical System is the #5 most-reported problem area on the 2009 Mercury Mariner: 21 of 315 complaints on file (6.7%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 2009 Mercury Mariner have in total?
315 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 9 involved a crash, 0 involved a fire, 3 reported injuries, and none reported deaths.
What does NHTSA's electrical system category include?
NHTSA assigns each complaint to standard component categories; this page reports the ELECTRICAL SYSTEM category exactly as NHTSA defines and records it.
