hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
130,500 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2004 Mercury Grand Marquis engine problems

engine problem

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2004 Mercury Grand Marquis Owner Comments

problem #2

Sep 152014

Grand Marquis 8-cyl

  • 176,000 miles


The left hand (driver side) heat shield that covers the exhaust manifold has completely rusted at the bolting points causing the cover to dislodge and drag against the steering shaft. Several times while turning at intersections, especially when making left turns, the steering would temporarily lock up for a few seconds making turning extremely hazardous. Once I almost struck another vehicle due to the steering being locked while turning. I initially suspected low power steering fluid but fluid checked correct and pump seems to be working fine. I did not notice the rusted cover pinned between the steering shaft and manifold until I removed the engine cover and air intake tubing to access the spark plugs. I removed the rusted shield and the car turns just fine now. I have the rusted shield available for inspection if needed. Thanks

- Brunswick, OH, USA

problem #1

Oct 052013

Grand Marquis 8-cyl

  • Automatic transmission
  • 85,000 miles
The contact owns a 2004 Mercury Grand Marquis. The contact noticed that the vehicle continuously leaked coolant. The vehicle was towed to the dealer where they stated that the intake manifold needed to be replaced. The vehicle was repaired. The manufacturer was notified, but did not disclose that the part was modified from plastic to metal. The contact experienced multiple leaks before the part was modified to metal. The approximate failure mileage was 85,000. Remailed 08/18/14 updated 9/18/14 updated 02/11/2015

- Melbourne, FL, USA

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