2005 Mercury Montego problems & reliability
135 owner complaints filed with NHTSA for the 2005 Mercury Montego, alongside 2 safety recall campaigns. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
5 complaints report injuries (6 injured).
Federal crash records (FARS 2020–2023): 2005 Mercury Montego vehicles were involved in 11 fatal crashes with 9 occupant deaths. Involvement counts are not adjusted for how many are on the road and do not imply fault or a vehicle defect.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Power Train | 49 | 36% |
| Electrical System | 27 | 20% |
| Vehicle Speed Control | 24 | 18% |
| Service Brakes, Hydraulic | 16 | 12% |
| Engine | 10 | 7% |
| Structure | 10 | 7% |
| Engine and Engine Cooling | 7 | 5% |
| Fuel System, Gasoline | 6 | 4% |
| Unknown OR Other | 6 | 4% |
| Air Bags | 5 | 4% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Mileage when problems occurred
Half of the failures with a reported odometer reading occurred by 70,000 miles (middle 50% between 50,245 and 108,000 miles), based on 120 complaints that included mileage.
Complaints by incident year
What owners report
“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…”
Structure · filed Jan 20, 2025
“Tl* the contact owns a 2005 mercury montego. The contact stated that when the vehicle was started, the front passenger's side door remained open which resulted in a loss of the normal functions of instrument panel due to the passenger's side door ajar message overlaying all other system functions on the instrument…”
Latches/locks/linkages · filed Mar 18, 2021
“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”
Electrical System · filed Dec 3, 2020
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Federal defect investigations
- Idle instability
Preliminary Evaluation PE11018 · opened May 11, 2011 · closed Feb 7, 2013
Technical service bulletins
48 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2005 Mercury Montego. The 10 most recent:
The Powertrain Control/Emissions Diagnosis (PC/ED) manual has been revised for diagnosing electronic throttle bodies (ETBs). The ETC_ACT and ETC_DSD PIDs should not used to diagnose possible ETB concerns. The IDS has a…
SSM 46085 · Service Bulletin/Repair Instructions · issued Sep 21, 2016
Ford: see document search button for owner letter. Momentary engine idle rpm surge may be intermittent and may occur, due to deposits buildup in throttle body, at low speeds, while parking or entering driveway and check…
CSP-12N03 · Service Bulletin/Repair Instructions · issued Nov 29, 2012
Traction control lamp on--no dtc's present, or dtc p1889 in differential electronic module (dem). *nj
08-4-11 · Service Bulletin/Repair Instructions · issued Mar 1, 2008
Ford mercury service campaign: see document search button for owner letter. Certain 2005 through 2007 fwd and awd ford five hundred, freestyle and mercury montego vehicles - rear brake wear. Also have an owner's letter…
0710 · Service Bulletin/Repair Instructions · issued Nov 28, 2007
MIL WITH DTC P0106 AND/OR P0109. *KB
19722 · Service Bulletin/Repair Instructions · issued Apr 1, 2007
Battery light illuminated. *kb
19312 · Service Bulletin/Repair Instructions · issued Aug 1, 2006
Continuously variable transaxle (cvt) noise diagnosis. *tt
06114 · Service Bulletin/Repair Instructions · issued Jan 1, 2006
Intermittent instrument cluster gauge sweep/reset - multiple warning lights on - reverse lights on - vehicles built before 2/17/2006. *tt
0662 · Service Bulletin/Repair Instructions · issued Jan 1, 2006
Oil leak from power transfer unit. *tt
06411 · Service Bulletin/Repair Instructions · issued Jan 1, 2006
Grunt or squeak from front suspension during full lock turns - service tip. *tt
19005 · Service Bulletin/Repair Instructions · issued Jan 1, 2006
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
The 2005 Mercury Montego has 2 NHTSA recall campaigns — recall repairs are free at franchised dealers regardless of the vehicle’s age.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 2005 Mercury Montego?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.
- · Owners most often reported problems around 70,000 miles — budget accordingly if the car is approaching that mileage.