2005 Ford Mustang engine problems

Filed Mar 24, 2025 · Engine · 123,000 miles · AZ

The contact owns a 2005 Ford Mustang. The contact stated that the check engine warning light was illuminated. While driving at approximately 25-35 MPH for approximately two miles, the engine started overheating. The oil pan gasket was leaking. The contact stated that the failure was related to the federal safety agency Campaign Number: 16V779000 (Engine and Engine Cooling). There were several hoses that were split. The vehicle was taken to an independent mechanic who determined that the radiator and engine were cracked, and the pistons were loose. There was air in the oil. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 123,000.

Filed Feb 20, 2025 · Engine · OH

I have experienced two engine failures in my 2005 Ford Mustang due to timing chain issues, specifically the failure of the timing chain cassette, guides, and tensioners in the 4.0L SOHC V6 engine. The first failure happened suddenly with no warning, resulting in severe bottom-end damage, including rod knock. The timing chain cassette ends tend to snap off, sending debris through the engine and damaging lifters, camshafts, and other critical components. The second failure was preceded by an audible “death rattle,” a known symptom of timing chain guide and tensioner failure. Despite this, my vehicle never displayed a check engine light or oil pressure warning before either failure. Unlike later Mustangs with an oil pressure gauge, mine only has a warning light, which never activated.This issue poses a major safety risk, especially at highway speeds. My first engine failure occurred with no prior symptoms, which could have led to an accident had I been merging or overtaking. A failing timing chain can cause misfires, loss of power, or sudden engine shutdown, endangering the driver and others on the road. Independent mechanics have confirmed this issue, and Ford service centers recognize it as a common problem with the 4.0L SOHC V6 engine. Ford has quoted $3,000–$4,000 for timing chain service, making repairs nearly as expensive as engine replacement. These engines rely on multiple chains and hydraulic tensioners that wear out over time, causing slack in the timing chain, jumped timing, and catastrophic damage, typically after 100,000 miles. Despite this, there are no clear warning systems to alert drivers before failure occurs. While timing chains are considered serviceable components, the high failure rate of the timing chain guides and tensioners in these engines, combined with excessive repair costs, indicates a design flaw. I have spent around $4,500 addressing this issue, yet the risk of recurrence remains.

Filed May 11, 2018 · Electrical, Engine · 130,000 miles · MO

The 2005 to 2009 mustangs (all of them) have a water intrusion problem presented as a design flaw in the engine firewall that leaks water onto the smart junction block causing random electrical systems failure including the loss of engine ignition, loss of all systems, etc. In my case, the intrusion of water caused a sudden and complete loss of all systems. Discovered a day after heavy rain. There are thousands of reports of this on the web and the dealer admits it is a design flaw and known problem.

Filed Mar 28, 2018 · Body, Engine · 117,000 miles · IN · fire

Tl* the contact owns a 2005 ford mustang. The contact noticed that there was an abnormal noise coming form the engine. The contact mentioned that the front frame was damaged and the vehicle was too unstable to drive. The vehicle was taken to universal auto llc (491 west main street, greenwood, in 46142) where it was diagnosed that the lifters, timing chain, and timing chain kit needed to be replaced. The vehicle was repaired, but the failure recurred. In addition, the vehicle was leaking oil and white smoke was forming on the front passenger side of the vehicle. The vehicle stalled and failed to restart. The vehicle was towed back to the used dealer. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 117,000.

Filed Sep 26, 2017 · Engine · TX

Throttle body failure causes my vehicle to stop in the middle of the road without any warning.

Filed Mar 3, 2017 · Engine, Wheels · 180,000 miles · NY

: :..updated 03/08/17

Filed Nov 19, 2015 · Acceleration, Engine · FL

When I shift from park or neutral position to drive, the car surges forward. This has happened both when the car is in driveway stationary and intermittently at a stoplight. The date below that is required is incorrect; it has been doing it since I got the car I believe in feb 2005, but I didn't think of it being a safety issue until it was passed down to my daughter this year; for someone that isn't prepared, it could easily cause an accident

Filed Nov 5, 2015 · Airbags, Engine · 51,000 miles · CA

Engine light came on and car was sticking in gear so I took it to the dealer. The dealer found out through a diagnostic test that the throttle assembly but wanted me to pay almost $1000.00 to get it fixed. I told them no and picked my car up. I went on line and found out there was a recall on the throttle assembly.

Filed Jun 4, 2015 · Body, Engine · 72,453 miles · NC

Tl* the contact owns a 2005 ford mustang. While pulling out of the driveway at 5 MPH in rainy weather, water began pouring out of the dashboard. The contact detected a burning odor coming from the engine. The vehicle was not repaired. The contact replaced the cabin filter, but the failure recurred. The manufacturer was not made aware of the issue. The approximate failure mileage was 72,453.

Filed Apr 28, 2015 · Engine · 103,832 miles · VA

7 of 8 spark plugs broke while dealer was performing 100,000 mile service. $824 to replace 8 spark plugs. Really????