Problems · by component
2005 Ford Mustang electrical system problems
283 owner complaints to NHTSA about the 2005 Ford Mustang cite electrical system, 33% of all 868 complaints for this model year.
Complaints
283
33% of all complaints
Crashes
3
Reported by owners
Fires
4
Reported by owners
Injuries
3
Reported by owners
What owners say about the electrical system
Verbatim from NHTSA complaints, newest first
“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.”
“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 searching online, I found countless amounts of threads and videos of other Mustang owners experiencing the same issue. Most of them are caused by a faulty relay connection inside the Mustang's fuse box that is causing the radiator fan to fail. The faulty relay would get burnt and cause a short thus not providing power to the radiator fan which left many…”
“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.”
“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.”
Showing 6 of 283 reports. Read every report on NHTSA.gov.
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 11, 2026NHTSA vehicle page
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.