FUEL GAUGE ERRATIC/INACCURATE AND/OR MIL ON WITH DTC P0463, B1202, B2627, B2879, AND/OR P2068.
full bulletin at NHTSA ↗2007 Mercury Montego electrical problems
moderate 5 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Complaints
5
Recalls
0
Avg fix
$850
When does it fail?
Of the 5 electrical complaints filed for the 2007 Mercury Montego, here's the actual mileage breakdown — failures cluster heaviest at 50,000-75,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
No new NHTSA electrical complaint has been filed on this vehicle in over 13 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering electrical on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 4 most recent
Tl* the contact owns a 2007 mercury montego. The contact stated that while driving approximately 35 MPH, the fuel gauge and speedometer backlights failed to illuminate. The vehicle was not taken to a mechanic for diagnostic testing. The vehicle was not repaired. The approximate failure mileage was 70,000.
An electronic device known as the smart junction box has failed 3 times since new.the first two times it was replaced under the original manufacturer"s warranty. The warranty has expired and it failed again. This part is very expensive costing in excess of $500.00 plus labor charges which I must pay. When this part fails, the signal lights, brake stop lights and other devices do not work which…
The contact owns a 2007 Mercury Montego. The contact stated that while driving at 25 MPH, the vehicle lost automotive power. There were several unknown warning lights illuminated. The vehicle was towed to an independent mechanic to be diagnosed, and the contact was informed that the failure was due to an electrical shortage in the taillight because of an accumulation of moisture inside the…
We have had intermittent electrical issues for several years.the car suddenly looses all electrical power. The battery is completely depleted. Once jump started the car will then operate properly. I have had the alternator replaced once and the car has been checked by mechanics several times, no one can find the problem. We often times smell a burnt plastic odor just before the failures. This…
Had electrical trouble with your 2007 Mercury Montego?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the electrical problem on the 2007 Mercury Montego?
It's a documented issue but not catastrophic. 5 complaints have been filed. Repairs average $850 and most owners catch it before it causes a breakdown.
At what mileage does the electrical typically fail?
Based on the 5 complaints filed, electrical issues most often appear around 73,520 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $850 for electrical repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to electrical?
No active recalls currently cover electrical issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2007/Mercury/Montego.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.