"How reliable is the 2008 Mercury Grand Marquis?"

"Based on 100 NHTSA complaints, the 2008 Mercury Grand Marquis has a median complaint mileage of 56122 miles. The most common issue is STEERING."

"What are common problems with the 2008 Mercury Grand Marquis?"

"The most frequently reported component in NHTSA complaints for the 2008 Mercury Grand Marquis is STEERING, accounting for a significant portion of the 100 total complaints filed."

2008 Mercury Grand Marquis: Reliability Data

Source: NHTSA — 100 complaints

100

Total Complaints

56,122mi

Median Mileage

STEERING

Top Issue

Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

25,000 25th Percentile

56,122 Median Mileage

78,013 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

STEERING

VEHICLE SPEED CONTROL

ELECTRICAL SYSTEM

EXTERIOR LIGHTING

STRUCTURE:BODY

SERVICE BRAKES

SERVICE BRAKES, HYDRAULIC

ENGINE

POWER TRAIN

SEAT BELTS

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"WHEN STEPPING ON BRAKE, MOTOR RACED UP TO 5000 RPM. ( LIKE CRUISE CONTROL WAS ENGAGING. HAD TO GO TO NEUTRAL PUMP THE ACCELERATOR TO BRING RPM DOWN. IN A PARKING LOT WITH BOTH FEET ON THE BRAKE IT PUSHED ME 5 FEET BEFORE I COULD GET IT UNDER CONTROL. *JB"

"FALSE ACCELERATION OF 2008 MERCURY GRAND MARQUIS. ON OCT. 9TH, MY WIFE AND I AND TWO FRIENDS (FROM PA AND DE) WERE IN VEHICLE HEADED FOR DINNER. CRANKED VEHICLE AFTER SETTING FOR APPROXIMATELY 22 HOURS. ENGINE REVVED UP TO AN ESTIMATED 4000 RPM CREATED LOUD RUMBLING SOUND AND VIBRATED VEHICLE. I..."

"JUST BOUGHT THE 2008 GRAND MARQUIS, FIRST DAY, RADIO DID NOT WORK, (STILL DOES NOT WORK PROPERLY). TOOK THE CAR IN FOR OIL CHANGE 2500 MILES, ALSO ASKED THEM TO CHECK OUT A NOISE THE CAR WAS MAKING. I WAS JUST INFORMED YESTERDAY I NEED A NEW ENGINE. THEY THE DEALER SAID IT WAS SOMETHING TO DO WITH T..."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28