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.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.


really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
23,248 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 Mountaineer engine problems

engine problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2005 Mercury Mountaineer:

Unsubscribe any time. We don't sell/share your email.

2005 Mercury Mountaineer Owner Comments

problem #3

Nov 102007

Mountaineer 4WD 8-cyl

  • Automatic transmission
  • 31,503 miles


Accelerator: Speed control car lurched out of control in reverse and forward intermittently.

- Germansville, PA, USA

problem #2

Jul 162007

Mountaineer 8-cyl

  • Automatic transmission
  • 15,240 miles
This is the second complaint. The 2005 Mercury Mountaineer spontaneously accelerated on the freeway. I was driving at 70 mph and it accelerated to over 80 mph. The gas pedal was pulling itself down.

- San Diego, CA, USA

problem #1

Jun 282007

Mountaineer 4WD 8-cyl

  • Automatic transmission
  • 23,000 miles
The contact owns a 2005 Mercury Mountaineer. While pulling into a parking spot at 5 mph, the vehicle automatically accelerated to an unknown speed. The contact was depressing the brake pedal at the time of failure. The VIN and engine size were unknown. The current and failure mileages were 23,000.

- San Diego, CA, USA

Not what you are looking for?