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.

NHTSA — Engine And Engine Cooling: Engine Problems


fairly significant
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
10,808 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 Montego engine problems

engine problem

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

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

2005 Mercury Montego Owner Comments

problem #3

Jan 032010


  • 27,000 miles


While idling when stopped or when moving slowly, the engine speed suddenly accelerates to above 3500 RPM causing the car to lurch forward unless the brake is firmly applied. The sudden acceleration lasts 3 to 5 seconds. Placing the gear into neutral has no effect on the engine speed. This happens sporadically. In the last 3 months it has happened approximately 7 times. Dealer says the car's computer system reports nothing unusual.

- Viera, FL, USA

problem #2

May 022007

Montego 6-cyl

  • Automatic transmission
  • 5,000 miles
The contact owns a 2005 Mercury Montego. The contact stated that the vehicle's check engine light continues to illuminate. He has taken his vehicle to the dealer fourteen times and have been unable to permanently repair the failure. The dealer currently has the vehicle and have had it since May 2, 2007. The VIN, purchase date, and engine size were unknown. The current mileage is 19,000 and failure mileage was 5,000.

- Lemmon, SD, USA

problem #1

Jan 312005

Montego 6-cyl

  • Automatic transmission
  • 423 miles
Purchased vehicle in Jan.05 seat belt replaced in Jan transmission replaced in Feb. 05 and a valve replaced due to check engine warning fuel pump replaced in Aug.05, now have trouble starting car

- Huron, OH, USA

Not what you are looking for?