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Engine coolingPart report

2000 Mercury Cougar Engine cooling Problems

Complaints
26about this part
Share
12%of 211 total for the year
Median mileage
59,500miles
Trend
StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.

NHTSA recorded 26 complaints about the engine cooling of the 2000 Mercury Cougar, 12% of the 211 complaints for this model year. Where a mileage was given, the median is 59,500 miles. 1 of these say a crash was involved, according to the filers.

Example complaints

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

“I have a 2000 Mercury Cougar that once warmed up accelerates 3000 to 3500 RPM and will not slow down until I come to a dead stop. I had it in for this problem at least 6 times and they can't fix it. I called the ford/Mercury service hot line to see if something could be done about this. When I called about this I thought that a Mercury rep. Would get a hold of the car dealership were I got the car (johnson ford lincoln/ Mercury in pittsfield, ma) and then get a hold of me. I called in jan. …”

NHTSA complaint #10010375, filed 2003-03, 10,000 miles

“The vehicle, 2000 Mercury Cougar, begins jerking as it is being driven at any speed, and results in complete shut down of engine. Sometimes the engine will restart after waiting several minutes, and will not restart at times; requiring towing. I took the vehicle to the local dealer, and an employee stated that it was known by the manufacturer to be a design flaw in that year vehicle. Another employee took him to the side and scoulded him for the disclosure. They would not discuss it further, even though I continued to question what they were doing to correct this known defect in workmanship. …”

NHTSA complaint #10238800, filed 2008-08, 103,000 miles

“Sickly sweet smell when air conditioner on. Initially checked for possible fluid leakage from air conditioner. That was not it. Later traced to toxic mold in a trapped area of the air conditioning path. Dealer sprayed in fungicide which worked for a short while. On one occasion I got out of the car and into the house and could smell this sickly sweet smell on my breath. The day after I started coughing and it took 3 months of intensive medical to get it cleaned up. Then I got another whiff and started coughing again. I discover this is a known problem, but not admitted. …”

NHTSA complaint #10070755, filed 2004-01, 8,000 miles

“This car has intermittently shut down in traffic at 70 MPH, also will not start from time to time. Very unreliable transportation. Incredibly poor choice of vehicle. Key has electronic chip in it which malfunctions. Key replaced once under warranty; went bad again. Costs $400 to replace.”

NHTSA complaint #10069419, filed 2004-01, 23,000 miles

“While driving 55 MPH driver heard a loud knocking noise coming from the front. Driver noticed fluid leaking from underneath the vehicle. Driver took vehicle to a garage for inspection, and mechanic determined that intake manifold needed to be replaced.”

NHTSA complaint #10116999, filed 2005-03, 64,000 miles

Engine cooling: other model years

YearComplaintsShare of year
20021112%
20011113%
20002612%
19996715%
19973039%
19962134%
19951917%
19943223%
199310554%
19921820%
19911723%
1990910%
1989911%
1988611%
1987515%
198618%
1985110%
1984424%

Other parts of the 2000 Mercury Cougar

Electrical system
63 complaints
Fuel system
46 complaints
Visibility (wipers, defrost, mirrors)
18 complaints
Air bags
17 complaints
Vehicle speed control
16 complaints
Brakes
12 complaints
Other or unknown
12 complaints
Transmission and drivetrain
9 complaints
Exterior lighting
8 complaints
Steering
8 complaints
Equipment
7 complaints
Body and structure
7 complaints

← All problems reported for the 2000 Mercury Cougar

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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