THE VEHICLE ACCELERATEDS WHEN THE BRAKE PEDAL IS DEPRESSED. BECAUSE THE BRAKE PEDAL AND THE GAS PEDAL HEIGHT IS NEARLY THE SAME HEIGHT AND WHEN DEPRESSING THE BRAKE PEDAL YOU CAN ALSO DEPRESS THE GAS PEDAL CAUSING THE VEHICLE TO ACCELERATE. THE VEHICLE ACCELERATES WHEN THE BRAKE PEDAL WAS DEPRESSED. *TR
2008 Mercury Grand Marquis brakes problems
severe 6 complaints filed with NHTSA · avg repair $450
Complaints
6
Recalls
0
Crashes
1
Avg fix
$450
What owners are reporting 4 most recent
TL*THE CONTACT OWNS A 2008 MERCURY GRAND MARQUIS. WHILE DRIVING 65 MPH ON A TWO LANE ROAD, THE VEHICLE ACCELERATED WHEN THE BRAKE PEDAL WAS DEPRESSED. THE CONTACT REAR ENDED THE PRECEDING VEHICLE. THE CONTACT WAS INJURED. THE AIR BAGS FAILED TO DEPLOY AND THE SEAT BELT DID NOT TIGHTEN. THE FAILURE AND CURRENT MILEAGES WERE 17,000. REMAILED 12/10/08. *LJ
THANK GOODNESS, THERE WASN'T AN ACCIDENT. RATHER, I HEARD THAT YOU SHOULD CHECK YOUR EMERGENCY BRAKE CABLE EVERY 50,000 MILES. HOWEVER, MY CAR IS SO LOW MILEAGE FOR ITS AGE THAT I DECIDED I SHOULD HAVE THE CABLE CHECKED ANYHOW. THEN, I HEARD THAT MANY OF THE AFTERMARKET EMERGENCY CABLES ARE DEFECTIVE. THANKFULLY, MY SON, [XXX] , KNOWS SOMEONE WHO CAN CHECK THE CABLES. WE TESTED CABLES FROM TWO AUT…
ON OCTOBER 27, 2010, MY WIFE WAS DRIVING WITH ME IN THE CAR AND SHE STARTED TO BRAKE FOR A RED LIGHT. SHE WAS GOING ABOUT 30 MILES PER HOUR. AS SOON AS SHE APPLIED THE BRAKE, THE ENGINE ACCELERATED AND SHE HAD TO USE A LARGE AMOUNT OF BRAKING PRESSURE TO STOP THE CAR. AS SOON AS THE CAR STOPPED, SHE TOOK HER FOOT OFF THE BRAKE AND THE ENGINE RETURNED TO IDLE. YESTERDAY, I WAS DRIVING THE CAR A…
Common questions
How serious is the brakes problem on the 2008 Mercury Grand Marquis?
It's a meaningful issue. 6 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $450.
At what mileage does the brakes typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $450 for brakes repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to brakes?
No active recalls currently cover brakes issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Other problem areas on this vehicle
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Severity ratings are derived from reported crashes, fires, injuries, and fatalities.
Repair cost estimates are independent-shop national averages and may differ in your area.
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