Problems · NHTSA complaints

2005 Mercury Montego problems

Owners filed 135 complaints about the 2005 Mercury Montego with NHTSA between Apr 2005 and Jan 2025. The most-cited component is power train (49).

Complaints
135
Filed with NHTSA
Crashes
10
Reported by owners
Fires
2
Reported by owners
Injuries
6
People reported injured
Deaths
0
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Power train49
  2. Electrical system27
  3. Vehicle speed control24
  4. Service brakes, hydraulic16
  5. Structure10
  6. Engine10
  7. Engine and engine cooling7
  8. Fuel system, gasoline6
  9. Air bags5
  10. Fuel/propulsion system5
  11. Latches/locks/linkages3
  12. Exterior lighting3
  13. Wheels2
  14. Service brakes2

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Nov 10, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
20055
20064
20079
20087
200911
201016
201122
201210
201311
20147
20158
201611
20173
20184
20191
20204
20211
20220
20230
20240
20251

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Power train

49 reports3 crashes
“I OWN A 2005 MERCURY MONTEGO. WHILE DRIVING VARIOUS SPEEDS, ALL OF THE INSTRUMENT PANEL GAUGES WOULD ILLUMINATE AND DROP TO ZERO AND THE SEAT BELT INDICATORS WOULD ILLUMINATE AND CHIME. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED. THE APPROXIMATE FAILURE MILEAGE WAS 135,000”
Owner complaint to NHTSAFiled Dec 3, 2020Power train, Electrical system, Exterior lightingODI 11377774

Electrical system

27 reports1 crash2 fires
“THE CAR HAS BEEN LURCHING FORWARD AND DECELERATING RANDOMLY. KEEPS GOING INTO "FAILSAFE ENGINE MODE" AND THE WRENCH LIGHT COMES ON BUT ONLY FOR A FEW MOMENTS, THEN RUNS NORMALLY AGAIN AFTER RESTARTING. HAVEN'T BEEN ABLE TO HAVE THE LIGHT ON LONG ENOUGH TO GET DIAGNOSTICS DONE. HAPPENS WHILE DRIVING OR WHEN STARTING OCCASIONALLY.”
Owner complaint to NHTSAFiled Apr 12, 2018Electrical system, Vehicle speed control, Fuel/propulsion systemODI 11084766

Vehicle speed control

24 reports2 crashes
“TL* THE CONTACT OWNED A 2005 MERCURY MONTEGO. WHILE DRIVING APPROXIMATELY 30 MPH, THE VEHICLE EXPERIENCED UNINTENDED ACCELERATION AND CRASHED INTO THE REAR OF A SECOND VEHICLE. PRIOR TO THE FAILURE, THE ENGINE RPMS ERRONEOUSLY INCREASED AND THE VEHICLE SURGED FORWARD. THE FRONT END OF THE VEHICLE SUSTAINED SEVERE DAMAGE, BUT THE AIR BAGS DID NOT DEPLOY. THE VEHICLE WAS DESTROYED AND TOWED. THERE WERE NO INJURIES AND A POLICE REPORT WAS FILED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE LOCAL DEALER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS 150,000.”
Owner complaint to NHTSAFiled Aug 31, 2018Air bags, Vehicle speed controlCrash reportedODI 11123851

Service brakes, hydraulic

16 reports1 crash
“TL*THE CONTACT OWNS A 2005 MERCURY MONTEGO. THE CONTACT WAS DRIVING AT SPEEDS OF 20 MPH. WHEN THEY ATTEMPTED TO PASS ANOTHER VEHICLE, SHE DEPRESSED THE ACCELERATOR AND THE VEHICLE WAS HESITANT TO INCREASE SPEED SIMILAR TO DRIVING WHILE IN NEUTRAL. IN ADDITION, WHEN DEPRESSING THE BRAKE PEDAL, THE VEHICLE WOULD JERK ABNORMALLY. THE DEALER RESET THE VEHICLE COMPUTER SYSTEM AND THE VEHICLE RETURNED TO NORMAL OPERATION FOR A SHORT PERIOD; HOWEVER, THE FAILURE RECURRED. THE CONTACT HAD NOT TAKEN THE VEHICLE BACK TO THE DEALER. THE FAILURE MILEAGE WAS 51,000 AND THE CURRENT MILEAGE WAS 64,000.”
Owner complaint to NHTSAFiled Apr 20, 2010Service brakes, hydraulic, Vehicle speed controlODI 10326674

Structure

10 reports1 crash
“This vehicle had a recall performed on it. In the recall, it states that the door does not latch properly in colder weather. Vehicle has been brought to the dealership. They have stated that they have performed the recall service. But when the car is driven, the door still does not latch which causes a safety issue because it will open randomly. This has been brought to Ford’s attention and they have not been able to help with a solution.”
Owner complaint to NHTSAFiled Jan 20, 2025StructureODI 11637100

Engine

10 reports
“CAR RUNS GREAT FOR ABOUT 20 MINUTES THEN I GET A SURGE IN THE ENGINE, DASH CLUSTER GOES DEAD, CAR JERKS AND I LOSE POWER RANDOMLY. EVERYTHING COMES BACK ON BUT WILL GO OUT MULTIPLE TIMES GETTING WORSE EVERYTIME. I HAVE LOST POWER TO TRANSMISSION ONCE, NO FORWARD OR REVERSE. REPLACED THE DASH CLUSTER AND CAR RAN GREAT FOR 2 DAYS THEN STARTED ALL AGAIN. THIS HAPPENS MAINLY WHILE IN THE CITY, HASN'T HAPPENED ON HIGHWAY YET THANK GOODNESS. CAR JUST SITS IN DRIVEWAY, AFRAID TO DRIVE IT. I SEE COUNTLESS PEOPLE WITH THIS ISSUE ALL THE WAY BACK TO WHEN CAR WAS RELEASED AND STILL NO SOLUTION.”
Owner complaint to NHTSAFiled Jul 1, 2016Electrical system, EngineODI 10882183
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 10, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.