definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
38,869 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.

2005 Mercury Mariner fuel system problems

fuel system problem

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2005 Mercury Mariner Owner Comments

problem #3

Oct 012011

Mariner 4-cyl

  • 66,606 miles


While stopped, the accelerator pedal sticks in the "up" position, and requires excessive force to move the vehicle. This sometimes results in excessive acceleration when the pedal becomes unstuck.

- Winthrop Harbor, IL, USA

problem #2

Dec 152010


  • 50,000 miles
Gas mileage has suddenly and markedly plummeted on highway driving. Air filter replaced - no change. There has been no change in driving patterns. It has gone from around 20 hwy to around 10 hwy out of the blue - no engine/tranny/brakes issues or anything like that. Not a clue.

- Orange, VA, USA

problem #1

Aug 162006

Mariner 6-cyl

  • Automatic transmission
  • miles
Fuel mileage for 2005 Mercury Mariner is not even close to what is stated on window sticker. I completely understand that driving habits and condition apply, but when the window sticker reads 22 local 26 hwy and your actual is 16 hwy, there is something wrong. The car has been to the dealer on a regular basis and each time I have complained. They do there own test and state the truck is getting 22 mpg. I do all highway driving on a relatively flat surface all week long and only get 16 mpg. The tail pipe is full of soot and the dealer states no problem.

- Kings Park, NY, USA

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