2016 Ford Mustang engine problems

Filed Oct 21, 2026 · Engine · NY

Coolant intrusion caused by a crack in the engine block coolant leaking into cylinder 3, engine replacement needed. 50k miles on the vehicle.

Filed Sep 3, 2026 · Engine · AL

Brought the car in for service. The tech called me back and said the engine was blown. Condensation in cylinder 3. This was due to the cylinder walls being engineered to small. Which caused a leak in the coolant jacket. I paid out of pocket nearly $10,000 to have it replaced because the third party warranty that I had purchased declined my coverage to fix it because it’s a known issue by ford. Bc

Filed Aug 20, 2026 · Engine · PA

See attached document for complaint

Filed Aug 5, 2026 · Engine · CA

Nelson v. Ford Motor Company is a class action lawsuit targeting a defect in Ford's 2.3-liter EcoBoost engines. The suit highlights coolant leaks into engine cylinders, overheating, and catastrophic engine failures. I have had my 2016 ford mustang ecoboost in and out of mechanic shops for months now accumulating well over $7K in out of pocket expenses. I have been to multiple mechanics trying to diagnose and fix the problem but in the end it was a design flaw in the 2016 ford mustang ecoboost 4 cylinder which caused it to leak coolant, misfire, and overheat. I have been having this problem for some time now, this put my safety and the safety of others at risk because I had to slow down dramatically in order to pull over on the freeway due to the engine overheating from coolant loss. I've also experienced problems like trouble starting, rough idling, loss of coolant, and huge clouds of white smoke coming from the exhaust upon start. I have saved every single receipt and invoice breakdown since this problem began. My mechanic has also been documenting everything including taking notes and photographs of every issue. My car is currently in the shop right now being worked on. My mechanic says that he can temporarily patch the problem with a high performance head stud, copper sealant, and an ExtremeHeat metallic repair paste by JB Weld to momentarily solve the issue. He says that he does not know how long this patch will last so he is insisting I either get a new car or to see what my options are regarding the class action lawsuit filed against Ford.

Filed Feb 1, 2026 · Engine, Fuel system · CA

At about 75k miles my mustang started misfiring at about 2,500 rpm’s and higher. Turns out it was a blown head gasket. This engine model is prone to what happened to it. Ford should have a recall for these engine and a solution as they’re ticking time bombs. I wish I could drive with the peace of mind of not worrying about it. I couldn’t drive my car for months because of the warranty not even wanting to cover it. The warranty from the used car dealership. Got unlucky.

Filed Jan 28, 2026 · Engine · CA

The head gasket in my 2016 mustang eco boost failed. I have 126k miles and coolant is leaking into cylinder 2. I’ve always taken care of the maintenance on a timely matter and no modifications have been done.

Filed Jan 8, 2026 · Engine · FL

2016 Ford Mustang 2.3L Ecoboost Engine. Coolant intrusion into the cylinder. It's a known issue, an engine block design flaw. Ford was replacing the whole engine when those cars were under warranty. There is extensive content online about it and dozens of class actions.

Filed Jan 1, 2026 · Engine · KS

My cars head gasket blew at only 45,000 miles. Replaced my a local well known mechanic for around $3500.00. Now my car at 96,000 miles has blown the head gasket again. I believe the car needs a whole new block. I have seen several lawsuits regarding this and just would love my car running again. This is NOT cheap to fix for me.

Filed Dec 15, 2025 · Engine · TX

From what I can remember its always been an issue with cylinder 3. I was always repaired by Ford Auto Nation of Fort Worth and Auto World Repair 2021 Engine Failure: Confirmed and repaired blown head gasket 2022 Check Engine Light code P303 - Found faulty as well as ignition coil on cylinder 3 2025 Engine Failure: code P303 - Found faulty as well as ignition coil on cylinder 3 Excessive smoke during idle Cracked engine block due to coolant leak through cylinder wall

Filed Sep 6, 2025 · Engine · OH

Component/system: Engine (Coolant intrusion into cylinder 1); Inspection available: Yes; Safety risk: Sudden power loss on road; Reproducibility/Confirmation: Dealer verified coolant in cylinder 1 after engine inspection; Manufacturer, police, insurance representatives or others inspections: No; Warnings/symptoms: Check Engine light turned on, error code P0301, higher than normal engine temperature, low coolant in reservoir, white smoke, rough idle at turning of engine; First appeared: Around 100,000 miles.