Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2005 Ford Mustang owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2005 Ford Mustang. The contact stated that one day after a rainstorm she noticed several unknown warning lights were illuminated. The contact stated that the headlights were inoperable due to the water leaking into the interior of the vehicle. Additionally, there was water leaking into the interior of the dashboard. There was also water coming out of the driver's side front air vent and the interior lighting in the vehicle from the interior module and center console. The lights were flickering on and off. The contact took the vehicle to a local dealer however, the dealer was not able to determine the cause of the failure. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 40,000.
The contact owns a 2005 Ford Mustang. The contact stated that during inclement weather, water was entering the cabin of the vehicle through the passenger's side glove box. The contact stated that due to the failure, mold had developed throughout the vehicle on the carpet, doors, and interior seats. The contact's husband also discovered that water had entered the computer module after inspecting the vehicle and the module was removed. The contact stated that the vehicle was inoperable after several repairs and several battery replacements. The vehicle was not repaired. The contact called the dealer and was referred to the manufacturer for assistance. The manufacturer was notified of the failure but offered no assistance. The failure mileage was 87,000.
The contact owns a 2005 Ford Mustang. The contact stated while driving 65 MPH on a rainy night, the headlights started flickering. The contact stated that upon exiting the freeway, while driving 30 MPH, the headlights completely turned off and the hazard lights were inoperable. The contact drove to the nearest gas station and turned off the vehicle. The contact stated that upon attempting to restart the vehicle, the vehicle failed to restart. The vehicle was towed to the residence. The dealer and the manufacturer were not notified of the failure. The vehicle was not diagnosed or repaired. The failure mileage was approximately 170,000.
The contact owns a 2005 Ford Mustang. The contact stated that after parking and turning the vehicle off for extended periods of time, the vehicle would not restart, and the battery needed to be recharged. The vehicle was taken to the local service center who was unable to determine the cause of the failure. The local dealer and manufacturer were notified of the failure, but no assistance was offered. The failure mileage was approximately 150,000.
The contact owns a 2005 Ford Mustang. The contact stated that while driving at an undisclosed speed, the speedometer and several unknown gauges on the instrument cluster became inoperable. The vehicle was taken to the dealer, where it was diagnosed that the instrument cluster needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 56,981.
Body control module. It gets wet when it rains because of an engineering mess up. It shorts out my lights. Sometimes it can't get out of car because it messes with the locks and windows. Can't use my electric mirrors anymore. Instead of being a much needed recall they decided to not even make replacement bcm. It is a problem everything it gets wet that should have been recalled and fixed. At least a thousand other incidents of this happening to others.
I've own a 2005 Mustang GT since the year 2012. Throughout the years I've encountered problems where the cooling fan would abruptly shut off and cause the engine to overheat. The first time this happened I had to pull over to the side of the road countless of times just to let my car get cool enough to get back home. I brought the Mustang GT in to a mechanic who suggested to replace the radiator fan. After replacing it, the fan would work for a few weeks only for it to randomly shut off, but turn back on. Just recently I found oil in my spark plugs and found the following OBD II error codes: P0480 Fan 1 Control Circuit & P0481 Fan 2 Control Circuit. I am convinced the valve seals and maybe the piston rings were worn out due to excessive heat caused by the Mustang's electrical issues with the radiator fan. …
After the leaving the car turned off for approximately 1.5 hours my two teenage daughters, age 17 and 15, got in the car to drive home and noticed that the car smelled a little smoky. They drove down the road for about 5 minutes when the electrical panel went dead, then the power locks began to go up and down continuously and the smell of smoke became more prominent. At this point, they became very concerned that they were going to be locked in the car with smoke pouring out and not be able to get out of the car. So they pulled into a parking lot, immediately exited the car and called 911. As soon as they got out of the car, smoke began billowing out of both doors which were left open. 5 minutes after exiting the car, flames which reached two feet high, began coming out from under the glove compartment. …
None of the gauges work. I have to drive pacing myself with other vehicles. Only the icon for gas needed comes on when the gas is low. Starting after about 10,000 miles on the car I have had increasing problems getting fuel in the car. Not just myself, but anyone that tries to fuel the car. I initially started holding the fuel nozzle upside down to get gas and that worked for a few years. (although you look like a dumb ass that doesn't know how to put gas in a car!) this last year it has gotten so bad that I am lucky to get 2 gallons in it, and that is with it repeatedly shutting off. Since day one the right front wheel makes a grinding/clunking noise when I turn the tire in either direction. It makes me feel like the wheel will fall off. My cars body assembly is also crap. The front lower grill has popped off and disappeared. …
Defect in under cowl drainage leads to rainwater leaking into passenger compartment. Water drains down wiring harness into the Smart junction box casing electrical shorts that at first caused the right headlamp to shutdown after 15 seconds. Recycling the headlight switch brings the headlight back on for another 15 seconds. This condition renders the vehicle unsafe to operate from sunset to sunrise. Now the drivers side headlamp has begun the same problem. I checked online and it is apparent that this is a significant safety issue for which the vehicle manufacturer has no part available to fix. They initially informed me that the smj would be available to purchase last September. That has now been pushed back to February of 2016. They want over $400 for the part plus additional labor to program and install a component that should have been recalled years ago. …
Electrical complaints in other Mustang years
Frequently asked questions
How common are electrical problems on the 2005 Ford Mustang?
NHTSA has 283 complaints about the electrical system of the 2005 Ford Mustang, 33% of the model year's 868 complaints. The component named most often is instrument cluster/panel (68 mentions).
Is there a recall for 2005 Ford Mustang electrical problems?
No. NHTSA lists no electrical system recall for the 2005 Ford Mustang, though it has 5 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2005 Ford Mustang electrical problems start?
Half of the complaints with a recorded mileage happened before about 60,000 miles, and 12% before 25,000 miles.
Is it dangerous?
Owners linked 3 crashes, 4 fires and 3 injuries to electrical system problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.