2015 Ford Fusion engine problems

Filed Oct 15, 2026 · Engine · NC

coolant intrusion

Filed Sep 8, 2026 · Brakes, Engine · FL · crash

Year/Make/Model: 2015 Ford Fusion Engine Type: 1.5L EcoBoost 4-Cylinder Description of Safety Flaw and Incident: My vehicle is experiencing severe overheating and internal engine fluid loss due to the widely documented Ford EcoBoost coolant intrusion defect. The vehicle routinely runs hot, losing coolant rapidly with no external signs of a visible hose or radiator leak as well as failure of the brake lighting stop bumper and purge valve connecting to the gasline after fueling. This issue causes the vehicle to rapidly overheat while in motion, forcing sudden loss of engine power (limp mode) during highway driving. Car not properly cranking after fueling and brake light continuously being on even when brakes not being pressed. This unexpected drop in speed creates an immediate crash hazard for myself and surrounding traffic. Coolant entering the combustion chamber also fouls the spark plugs, causing severe engine stalling, rough idling, and misfires. I've spent several dollars fixing these malfunctions that have continuously persist. Ford Motor Company has historically been aware of this structural defect involving coolant leaking across the cylinder bore walls, yet failed to issue a comprehensive safety recall for 2015 models. I am filing this complaint to urge the federal safety agency to open a formal defect investigation and mandate a safety recall, as this component failure leaves drivers stranded in hazardous traffic situations.

Filed Aug 26, 2026 · Engine · SC

The 2015 ford fusion are very known for this issue with coolant lost and more recently I was driving and a warning popped up saying my coolant was over temps so I pulled over and turned the car off next thing you know my coolant was gone and I just filled it up. To make it even worse my mechanic told me it’s a known issue and ford doesn’t even cover it because it isn’t a recall

Filed Aug 3, 2026 · Engine · IN

I have a coolant intrusion into the engine and blew my engine in the middle of driving down the highway. No signs, no warning. Lost control, ended up on side of road. Had husband pull it the rest of the way home.

Filed Jun 25, 2026 · Engine · OH

Engine warning display came on with "cylinder over temperature" immediately after temperature gauge went from normal (slightly under 1/2 way) to "Hot" immediately. Shut off engine - opened hood, coolant was noticed on passenger side just below coolant bottle. After waiting a little bit the tempature on the gauge hadn't dropped any & the radiator was cool to the touch. The day before washer fluid was added, while there the other levels were checked after sitting all night, the coolant was showing within the marked operating zone. Ended up calling for a tow truck.

Filed Jun 6, 2026 · Engine · FL

I bought the 2015 ford fusion for my son as a graduation present as he headed off to college on his own. The car started misfiring upon cold start for about 5-10 seconds. Eventually the car started misfiring while driving. He frequently had to pull over on the side of the road while driving to make it to his destination. I had him take the car to a ford dealership to be inspected. To my surprise, Ford Parks of Wesley Chapel told me that the 2015 Ford Fusion 1.5L ecoboost has a known issue with coolant leaking into the engine causing misfiring and eventually engine failure. They offered no assistance in fixing the problem. They told me the cost to replace the engine was over 13,000.00.

Filed May 27, 2026 · Engine · 91,000 miles · FL

The contact owns a 2015 Ford Fusion. The contact stated that the vehicle was experiencing excessive coolant consumption, causing the low coolant pressure warning light to illuminate prematurely. The vehicle was taken to an independent mechanic, where it was diagnosed with coolant intrusion in the combustion. The contact was informed that the head gasket or the engine needed to be replaced immediately to prevent further issues. Additionally, the contact was informed that the failure was due to a faulty engine design. The vehicle was not yet repaired. The manufacturer was notified of the failure and informed the contact that although the model year was affected, the vehicle was not covered. The failure mileage was approximately 91,000.

Filed May 5, 2026 · Engine, Fuel system · NY

I own a 2015 Ford Fusion SE. I bought it used when it only had 47,000 miles on it. Over the course of time since buying it in DEC 2022 until now, it has had low coolant that I have had to address but no visible leaks. Current mileage now is 87,100 and just recently the coolant was low again and the check engine light came on for DTC P0301 -Cylinder 1 misfiring. It has had rough start ups, rough idle, decreased acceleration, and poor fuel efficiency. I have found the problem to be Coolant Intrusion – Engine Defect Concern “Coolant intrusion” is a known engine design defect in which coolant leaks into the cylinders, leading to internal damage, misfires, and eventual engine failure. After researching it I found that many other people have had the very same issue with no help from Ford. This should be a recall as this is an internal issue with the short block and something that should have been disclosed before purchasing this model/engine. The only repair that will fix the core of the issue is replacing the entire short block which costs thousands of dollars, way more than the cost of the entire vehicle at this point. Without fixing the issue, the engine will fail. Again, this should be something Ford should pay to repair, not any customer who came into this blind.

Filed Apr 25, 2026 · Engine · AZ

While driving at 30MPH, vehicle lost power without any notice/warnings. Had the vehicle towed to dealer who misdiagnosed as transmission problem (quoted $8000 to swap). Had a second opinion and indeed it was the dreaded coolant intrusion in the engine, catalytic convertor which cause the loss of acceleration and the transmission was completely fine. This is a ridiculously common issue with the 1.5L engine and Ford has not offered any support other than "oh well" mentality. Prior to this, car lost coolant, I had to top it off every couple days, blew with smoke, sweet smell, all in line with coolant intrusion. Had the lines checked and repaired as recommended but about 6 months later this happened.

Filed Apr 17, 2026 · Engine · WI

Coolant Intrusion in the Block Led to white smoke coming out of the exhaust thick enough that I couldn't see as I tried to back out of the road.