Two problems related to tire sidewall have been reported for the 2007 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Mercury Grand Marquis based on all problems reported for the 2007 Grand Marquis.
2007 Mercury marquis with michelin energy lx4 p225-60 r16 tires with 15,000 miles. At 65 mph felt vibration in front end, I started braking and pulling to shoulder when left front tire exploded. Inspection of tire showed the outside sidewall blewout. I searched the internet and found several other incidents of this reported. This tire is unsafe and should be immediately investigated. I will take pictures for future reference. The car is still under warranty and I will have the tire replaced. I hope people don't have to die before this gets fixed.
High speed tire failure - June 7 and June 28 - 2007 Mercury LS - 21000 miles June 7, 2009 driving I-49 south, lafayette parish, la, temperature about 95. Wife only passenger. Roadway clear, no debris or thrash, traffic light, without warning, right front deflates. Drove about 1/2 mile to exit before stopping. Sides of tires still firmly attached to rim. Roadside of tire completely separated from sides. There was no noise such as a blowout. On removing tire to change no evidence of a puncture, outside or inside was seen. New tire purchased June 8, 2009. Dealer would not give consideration to pro rate . June 28, 2009, 2 passengers, driving right lane I-12 east, east baton rouge parish,la,, 73mph, temperature about 97 degrees. Traffic heavy. Right rear tire suddenly deflates (no blowout noise) , car swerves slightly into left lane nearly colliding into left lane car. Swerve controlled and car driven to left shoulder. Too far front exit to drive off. Removed wheel, sidewalls still firmly attached to rim. Roadside of tire intact. No sign or evidence of puncture outside or inside. Tire in each instance had little treadwear. Contacted michelin customer service via phone. Advised to have dealer examine tire and contact them. Bill at delta world tire, 203 guilbeau rd, lafayette, la, on Thursday July 3 looked over tire stated several possibilities but could give a definite cause of deflation, same as other (June 8) dealer. No pro rate or free replacement. That did not make any difference as my reporting the incidents. I am scared with my remaining original tires. Tire: michelin lx4 ww --225/60r16.