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Electrical systemPart report

2005 Mercury Montego Electrical system Problems

Complaints
27about this part
Share
20%of 135 total for the year
Median mileage
79,500miles
Trend
FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.

NHTSA recorded 27 complaints about the electrical system of the 2005 Mercury Montego, 20% of the 135 complaints for this model year. Where a mileage was given, the median is 79,500 miles. 1 of these say a crash was involved and 2 a fire, according to the filers.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“About 6 months ago all the dash indicators turned on. They went out for a few minutes then came back on and stayed on. I was told it was in the electrical harness. It would be a $700.00 plus cost to fix it. It is a common problem I would think there would be a recall on such a situation. I have to drive not knowing if there is trouble with the lights on full time.”

NHTSA complaint #10915332, filed 2016-10, 175,000 miles

“Saw smoke coming from passenger's outside mirror, the metal was hot, then saw a small flame, under the mirror, so we pulled the fuse. A week later we put the fuse back in & smoke started coming from the mirror,again, so we pulled the fuse & have left it out. This fuse also controls the power seats, along with the outside mirrors. Both times the car was not running.”

NHTSA complaint #10272606, filed 2009-06, 52,450 miles

“Parked car at home after dropping daughter off in town car performed normally. Five hours later went out to pick daughter up. Started car and had no speedometer, odometer, tachometer, no cluster panel at all. No lights on panel, A/C would not function and backup lights came on and stayed on. The wrench symbol light came on at this time. I tested the car daily with the same results, until tuesday, august 11th. I had an appt to take it in to a ford dealer to have it diagnosed. …”

NHTSA complaint #10747906, filed 2015-08, 142,691 miles

“I own a 2005 Mercury Montego that has been a constant downward spiral.approx. 3 months ago, I had to replace the vehicles transmission,because I was told by ford that they do not sell the tools or parts to replace anything in it, the whole transmission had to be replaced.approx. 1 week ago, I was sitting at a traffic light and my car revved up to approx. 3500 RPM and pushed my car forward into traffic. …”

NHTSA complaint #10345904, filed 2010-07, 80,000 miles

“The instrument gauge on my 2005 Mercury Montego just went dead . Nothing registered, so there was no reading on my speed, engine heat gauge, fuel level, or tachometer. This happened once in early spring of this year (2012), but did not repeat until recently. It is now june and the same thing has re-occurred about 10 times in the past two weeks. After turning the car off and restarting, this sometimes (but not always), fixes the problem. Most recently, if the gauges do work, the check engine light turns on. …”

NHTSA complaint #10460882, filed 2012-06, 89,000 miles

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
2007617%
200678%
20052720%

Other parts of the 2005 Mercury Montego

Transmission and drivetrain
49 complaints
Vehicle speed control
24 complaints
Brakes
18 complaints
Fuel system
12 complaints
Engine
10 complaints
Body and structure
10 complaints
Engine cooling
7 complaints
Other or unknown
6 complaints
Air bags
5 complaints
Exterior lighting
3 complaints
Latches, locks and linkages
3 complaints
Seat belts
2 complaints

← All problems reported for the 2005 Mercury Montego

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology