2019 FORD MUSTANG Complaints

My vehicle recently had a head gasket leak due to a faulty engine block design. I noticed one day the coolant was lower than it should be but nothing concerning, over a month or so it got progressively lower & the car would also sputter/misfire on startups from time to time. This is due to coolant slipping through the gasket & getting into the cylinder & oil which can lead to catastrophic engine failure or worse. Eventually I got a check engine light & was told it was a misfire after running a diagnostic on the vehicles OBD2. I researched what the issue could be &it became more & more apparent that it was a head gasket issue. The oil was contaminated & coolant was getting very low. Apparently it’s a big issue since Ford is now facing a class action over the defect. The vehicle also has some issues with the transmission, for example ill start the car up on a cold California morning 50°F & let it warm up before driving & when I go into reverse after the car will jolt hard as if you were backing up & hitting something like a wall, even in the afternoon when you start it from a cold start & go into reverse it will do it. Not sure why but it’s concerning to say the least. The transmission also feels confused when shifting, when I’m in 4th about to push fit it will get confused & revs will drop slightly before going up again to up shift, also when downshifting due to braking the shifts can feel a bit hard, especially when needing to stopping fast. The engine & transmission are the most importantly parts of a vehicle & without them working properly is something no one should have to face.

The 10-speed automatic transmission (10R80) in my 2019 Ford Mustang GT began malfunctioning around 84,000–85,000 miles, displaying a consistent hesitation followed by a sudden jolt during acceleration between 15–30 mph. A Ford dealership confirmed the issue and diagnosed it as an internal leak in the clutch drum assembly, referred to as a “CDF drum internal leak.” The vehicle has not shown any warning lights or dashboard messages, and the symptoms developed gradually before becoming consistent. The malfunction causes the car to unexpectedly lurch forward during normal driving, which poses a safety risk to myself and others, particularly in traffic, at intersections, or when merging. This unpredictable behavior could lead to loss of control or rear-end collisions. The transmission remains installed in the vehicle and is available for inspection upon request; however, will be fixing it soon since it is my only car. To date, the vehicle has only been inspected by the dealership and not by the manufacturer, police, or insurance representatives.

5.0 GT Engine continues to lose power and has loud “clicking” when idling. First appeared after May 2025 oil change. Mustang dealer ran codes check - nothing shows up. Mustang dealer has recorded a video / audio of sound and recommends engine replacement. The engine only has 22,000 miles on it .

There is TSB that was issued on the shift forks of the 2018-2019 Ford mustangs where aluminum shift forks were originally installed which led to cracking and breakage. Due to this a TSB was issued reverting back to them using steel. My son purchased a 2019 Ford Mustang with only 9000 miles on it three months ago and this part has broke and no one wants to cover the Repair. This should be covered Repair. There should be a recall.

Coolant leaked into my engine cylinder blowing my head gasket . This is due to poor design from Ford. The cost to replace the engine is about $12,000

Vehicle was purchased new in 2019 and in 2022 my transmission started with harsh gear changes which resulted in a reprogram/relearn of the transmission. As of May 2025 my transmission is doing the same and has now caused my vehicle to stall while at a red light. In addition to this I have not seen any warning signs or check engine lights.

A vehicle was listed for sale in June 2025 with an odometer reading of 115,152 miles. However, a CarFax report dated March 13, 2025, showed the mileage as 37,707. This is a discrepancy of over 77,000 miles in less than three months, raising serious concerns about odometer tampering or title fraud. The issue was discovered prior to vehicle delivery, and the transaction was canceled. The dealership has not provided any explanation for the mileage increase. This discrepancy may mislead future buyers and compromise the vehicle’s maintenance and safety records. The vehicle was not inspected by a mechanic before cancellation. The concern has been reported to the Better Business Bureau (BBB), California DMV, and CFPB.

There is a coolant leak and that has caused significant damage to the engine due to a bad head gasket by poor manufacturing of the engine.

We purchased a Ford Mustang for our daughter 6 years ago, and have had the following ongoing dangerous and expensive widespread issue, 6 incidents to date, caused by Ford knowingly using soy based wiring (as opposed to petroleum based) for environmental reasons, that attract rats like it was cheese. The rats have been eating through essential wiring and once in the car also eating hoses and insulation, putting our daughter’s and others lives in grave danger and costing us thousands of dollars in continuous repairs, the last time rats ate through her brakes! (luckily discovered by warning lights in her car before her brakes failed) Ford is very aware of this issue and receive many complaints but do nothing, except refer me to you after I filed a complaint with them. No warranty covers this. Only my neighbors who don't have cars with soy based wiring don't have this issue, showing that this is clearly the cause. In a futile attempt to combat this, we have expensive monthly exterminator rat service, noise makers in her car, glue pads under her car, in her car (removed when driving), spray peppermint and bleach, and check the car daily. (Governor Newsom banned rat poison in Calif making it more challenging) But these expensive and time consuming measures are not full-proof as evidence of our continual costly repairs, and nothing will work until the root cause is addressed, the soy wiring. Ford needs to replace soy based wiring with petroleum based wiring, pay for all rat damage retroactively and future repairs until the soy wiring is replaced. (I have copies of all repair receipts, dating so far from Nov 2019 through April 2025) Just one of many article links in a quick google search that shows this is a widespread issue: "Rodents can’t get enough of Fords soy coated wiring and that’s a big problem!" [XXX] Please do something because Ford won't. (you ask date of incident, I have 6, I put most recent ) INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2019 Ford Mustang. The contact stated that while shifting from reverse(R) to drive(D) or from park(P) to drive(D), the vehicle jerked before shifting into the intended drive mode. While driving at approximately 50 MPH, the vehicle was shaking abnormally while accelerating. The check engine warning light had illuminated intermittently. The wrench symbol was displayed on the instrument panel, and the vehicle lost power. They waited for a while before restarting the vehicle. The failure was intermittent. The vehicle was taken to the dealer, who diagnosed that there was a failure with the transmission, but had not determined which part in the transmission had failed. The vehicle was not repaired. The manufacturer was informed of the failure and opened a case. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was unknown.