Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

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pretty bad
Typical Repair Cost:
Average Mileage:
189,000 miles
Total Complaints:
2 complaints

Most Common Solutions:

  1. replace intake manifold (2 reports)
1999 Mercury Grand Marquis engine problems

engine problem

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1999 Mercury Grand Marquis Owner Comments

problem #2

Jun 102016

Grand Marquis 4.6L

  • Automatic transmission
  • 300,000 miles


this mercury grand marquis engine intake is made of cheap part that will not last and it cost is very expense. and cost is high the company need to fix all the repair not the owner.

- , Tulsa, OK, USA

problem #1

Jul 022009

Grand Marquis LS 4.6L

  • Automatic transmission
  • 78,000 miles

Ford - Mercury changed away from a metal intake manifold to a plastic manifold to save manufacturing costs.They are now reaping service revenue because they are charging non-fleet consumers a hefty $1,500. to replace the defectively designed part. There was a court case which they settled, but it excludes claims after March 2006. For low mileage drivers this was not long enough for the part to fail. But fail it will at approximately 75,000 miles. I'll certainly consider this next time I buy, which will be very soon...

- , Alexandria, VA, USA

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