Skip to content
EnginePart report

2004 Mercury Monterey Engine Problems

Complaints
7about this part
Share
2%of 283 total for the year
Median mileage
106,227miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 7 complaints about the engine of the 2004 Mercury Monterey, 2% of the 283 complaints for this model year. Where a mileage was given, the median is 106,227 miles. 2 a fire, according to the filers.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

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

“In early 2012 both brake lights on dash would come on sporadically while driving.then came on more frequently. Soon the battery light started to come on at stops or low idles. 8/2012 dealer could not reproduce the brake lights coming on, but replaced alternator. 11/2012 still problem with brake lights on the dash coming on now plus the check engine light. …”

NHTSA complaint #10549811, filed 2013-10, 118,000 miles

“The contact owns a 2004 Mercury Monterey. The contact stated that while driving at various speeds, the vehicle stalled without warning. The vehicle was taken to the dealer on multiple occasions. The technician repaired the transmission. However, the vehicle continued to experience the failure. The manufacturer was not notified of the failure. The failure mileage was 70,000.”

NHTSA complaint #10662876, filed 2014-12, 70,000 miles

“The contact owns a 2004 Mercury Monterey. The contact stated that while driving at 27 MPH, the vehicle slammed to a stop and caught on fire. The contact stated that vehicle made a slamming start before catching on fire. The fire started under the hood of the vehicle. The vehicle had not been inspected however, the fire department determined that the fire was caused by mechanical failure. The vehicle was destroyed. The failure mileage was 128,000.”

NHTSA complaint #10479456, filed 2012-10, 128,000 miles

“The contact owns a 2004 Mercury Monterey. While driving at approximately 40 MPH, the vehicle stalled. The contact was able to restart the vehicle. The failure recurred on numerous occasions. The vehicle was taken to multiple dealers and independent mechanics who were unable to diagnose the failure. The failure persisted and the vehicle was taken to another independent mechanic who diagnosed that the PCM needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 110,000.”

NHTSA complaint #10778487, filed 2015-09, 110,000 miles

“The contact owns a 2004 Mercury Monterey. The contact stated that while driving 70 MPH, the vehicle stalled without warning. The contact was unable to restart the engine and the rpms increased. The vehicle was towed to the dealer to have a diagnostic performed. The contact also stated that the transmission was replaced twice however, the failure was not corrected. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 90,000 and the current mileage was 100,000. Updated 9/4/13 the consumer stated the transmission failed four times.”

NHTSA complaint #10524934, filed 2013-07, 90,000 miles

Related service bulletins

Engine: other model years

YearComplaintsShare of year
2007229%
200612%
200554%
200472%

Other parts of the 2004 Mercury Monterey

Transmission and drivetrain
203 complaints
Body and structure
19 complaints
Seats
16 complaints
Electrical system
11 complaints
Vehicle speed control
11 complaints
Fuel system
10 complaints
Brakes
8 complaints
Steering
8 complaints
Engine cooling
7 complaints
Wheels
7 complaints
Other or unknown
6 complaints
Suspension
6 complaints

← All problems reported for the 2004 Mercury Monterey

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