2.9

hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
48,164 miles

About These NHTSA Complaints:

The NHTSA is the US gov't agency tasked with vehicle safety. Complaints can be spread across multiple & redundant categories, & are not organized by problem. See the Back button — blue bar at the very top of the page — to explore more.

Get notified about new defects, investigations, recalls & lawsuits for the 2004 Mercury Mountaineer:

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

problem #1

Mar 142006

Mountaineer 8-cyl

  • Automatic transmission
  • 48,164 miles
Rear axle failure at 11,000 (side bearings) and 48,000 miles(bearings and rear axle). Due to design mistakes, and probably cost reduction programs, mud can trap open a breather valve for the rear axle. Then water goes through the valve and into the axle, and destroys the side bearings, and clutch flange, and pinion. The replacement cost of these items is nearly$1,300.

- Milford, MI, USA