2018 Ford Mustang Complaints

ENGINE — Filed 09/22/2026

Check engine light came on Sunday night. Monday had AutoZone check the codes - indicated misfire on two cylinders recommended spark plug replacement - Spark plugs purchased with intent to change Tuesday evening- Tuesday morning -Engine overheated on the way to class added more coolant - got the vehicle home and towed to local Ford Dealership the next day to learn that the coolant was leaking into the engine due to head gasket failure. Ford said the engine needed to be replaced.

ELECTRICAL SYSTEM,FORWARD COLLISION AVOIDANCE,BACK OVER PREVENTION — Filed 09/17/2025

The electrical components in the vehicle stopped functioning - for the lights on the interior the overhead stopped working on and off and then dimmed until one day never came back on. At the same time the sensor for cross traffic alert became buggy and then not functional which made all my safety features and cruise control not work. Now I have a TPMS sensor and check engine light with nothing serious wrong

UNKNOWN OR OTHER — Filed 09/19/2026

While driving at highway speeds passenger door spontaneously opened. Passenger was not touching or near latch. Has happened 3 times. Ford states no recall. Looking online seems to be a known issue.

UNKNOWN OR OTHER — Filed 09/10/2026

I own a 2018 Ford Mustang EcoBoost convertible and am reporting persistent spider activity that has become a recurring driver-safety concern. Spider activity occurs on or around the vehicle essentially every day. I routinely see multiple spiders and webs on the windshield, hood, doors, roof, trunk, sides, and around both exterior mirrors. Spiders repeatedly build webs between the doors/body and both mirror housings, and I have seen spiders crawl out from behind the mirrors numerous times, especially the driver-side mirror. I also find web strands inside the passenger compartment. On three occasions, a spider rebuilt a large web across the driver’s-seat entry area after I removed it. On Sept. 10, 2026, after a commercial car wash earlier that day, I had about six spider sightings within roughly 10 minutes. While driving, I saw one crawl up the hood and disappear near the base of the windshield. Shortly afterward, a sizable spider appeared INSIDE the windshield directly in front of my face, apparently coming from where the dash meets the windshield. I have severe arachnophobia and had an immediate panic response. I was fortunate to reach a nearby parking lot and stop without crashing. During the same period, I saw two spiders on the trunk, then another crawling across the interior headliner directly above me, followed by another emerging from the driver-side mirror. I am becoming genuinely afraid to drive this vehicle. This is not a cosmetic complaint. Spiders repeatedly appear in the driver’s immediate environment and create a risk of sudden distraction, involuntary panic, abrupt steering/braking, loss of lane control, and a crash. The car is normally kept closed and I rarely lower the convertible top because of this problem. I am not asserting a specific defect or entry path. I am asking NHTSA to review similar complaints and determine whether a vehicle-design condition may be contributing to persistent spider habitation or intrusion into the driver’s area.

ENGINE,FUEL/PROPULSION SYSTEM — Filed 09/10/2026

I own a 2018 Ford Mustang EcoBoost Premium with the 2.3L EcoBoost engine. The vehicle initially developed a check-engine light and was diagnosed with P0303 (Cylinder 3 misfire), P0316 (startup misfire), and P018C (fuel pressure sensor circuit low). On August 24, 2026, all four spark plugs and one ignition coil were replaced, and a fuel/induction cleaning service was performed. The P018C repair was declined at that time. On September 10, 2026, the vehicle started with an extremely rough idle and produced a very large cloud of white, sweet-smelling exhaust smoke. The check-engine light came on. The original codes, including the misfire codes, were present along with additional codes. The vehicle underwent approximately three hours of diagnostics and road testing. The codes were cleared, and afterward only P018C returned. Testing reportedly did not identify a head-gasket leak, but visible white smoke was still coming from the exhaust when I left the repair facility. Possible coolant intrusion involving the turbocharger was discussed, but the source was not confirmed. Later that day, the vehicle would not crank in Park but started in Neutral. While driving home, the engine began idling so violently at a traffic light that the entire vehicle shook and the tachometer fluctuated significantly. Before September 10, the vehicle had never produced white exhaust smoke, never shaken violently at idle, and always started. The repair facility attempted to inspect the cylinders with a borescope, but both of its borescopes were not functioning. I am concerned about possible coolant intrusion or another engine defect because of the Cylinder 3/startup misfire history, heavy white sweet-smelling exhaust, and severe intermittent rough running. The cause has not yet been confirmed, and I am concerned about possible engine failure or loss of power while driving.

ENGINE — Filed 09/11/2026

I own a 2018 Ford Mustang EcoBoost Premium with the 2.3L EcoBoost engine. The vehicle initially developed a check-engine light and was diagnosed with P0303 (Cylinder 3 misfire), P0316 (startup misfire), and P018C. On August 24, 2026, all four spark plugs and one ignition coil were replaced and a fuel/induction cleaning was performed. On September 10, the vehicle suddenly started with an extremely rough idle and produced a large cloud of white, sweet-smelling exhaust smoke. The check-engine light illuminated and the previous codes returned along with additional codes. The vehicle continued producing white exhaust smoke after several hours of diagnostic testing. Later that day, the engine shook violently while I was stopped at a traffic light and the tachometer fluctuated significantly. On September 11, the check-engine light returned and the previous diagnostic codes were again present. Firestone documented that coolant was present in the exhaust, that the coolant level was low again after coolant had been added the previous day, that the engine was burning coolant and producing white smoke, and that coolant was mixed with the engine oil. Firestone stated the engine may have a cracked head, failed head gasket, or internal engine crack and recommended complete engine replacement. The engine has now suffered a serious internal failure severe enough that the repair facility recommends replacement. The vehicle has exhibited violent shaking, unstable engine speed, repeated misfires, rapid coolant loss, coolant contamination of the engine oil, and coolant burning through the exhaust. I am concerned that continued operation could result in complete engine failure or sudden loss of engine power while driving, creating a significant safety hazard in traffic. Before September 10, the vehicle had never produced white exhaust smoke or experienced this severe shaking. I am reporting this as a potential safety defect involving the 2.3L EcoBoost engine.

SERVICE BRAKES — Filed 09/05/2026

It is a well-known issue across Mustang forms that the brake pedal sensor switch goes bad as well as the small rubber pad that presses against the brake pedal switch. This has happened to me multiple friends in my Mustang group as well as tons online. This is a serious issue because either it will make your vehicle believe the brakes are constantly being pressed letting you shift into gears while the brakes technically aren’t even depressed. That could result in someone getting ran over. Also, it makes it appear that you’re constantly pressing the brake pedal so drivers do not know when you are actually pressing the brakes. I had that issue, I resolved it, but then my switch failed later, which let me not even start the vehicle.

ENGINE — Filed 07/22/2026

2018 WITH 118,000 MILES. Had to get a full block engine replacement due to coolant intrusion into the cylinders. This was diagnosed and replaced at a Ford dealership.

POWER TRAIN — Filed 08/03/2026

Was driving my vehicle roughly 10-15mph after a stop, noticed vehicle wasn’t shifting into the gears properly as it was only in 2nd gear and the RPMs kept climbing, when it finally shifted into 3rd gear my transmission proceeded to lockup cause my rear tires to skid and stop in the middle of traffic and in the middle of an intersection disrupting the flow of traffic. Vehicle displayed a wrench light on the dash saying “see manual” as related to a Powertrain issue. Vehicle is in limp mode and barely drives, any shifting after 1st gear will cause the vehicle to lockup and lose all power for several seconds. ONLY HAS 28,330 MILES, DID NOT REACH THE FIRST SERVICE INTERVAL FOR MAINTENANCE ON THE TRANSMISSION.

POWER TRAIN — Filed 06/23/2026

My 2018 Ford Mustang EcoBoost with the 10R80 automatic transmission began experiencing hesitation, delayed engagement, and harsh jerking during low-speed acceleration (15-20 mph), especially when cold. Engine RPM would increase, but the vehicle would hesitate before engaging. The condition worsened over time and eventually the vehicle entered limp mode, causing a significant loss of power and illuminating a wrench warning light. An authorized Ford dealership diagnosed DTC P07F6 (Gear 9 Incorrect Ratio). The dealer verified fluid level, updated the PCM, and performed adaptive relearn procedures, but the problem remained. The transmission fluid was found to be dark with a burnt odor, and the dealer diagnosed an internal transmission failure requiring complete transmission replacement at an estimated cost of $9,250. This created a safety concern because the vehicle did not consistently accelerate as expected when entering traffic, crossing intersections, or merging onto roadways. Delayed engagement and loss of power reduced the ability to accelerate when needed. The vehicle has approximately 82,256 miles and has been maintained according to Ford's recommended service schedule. I am also aware of numerous publicly documented owner reports, technical discussions, and litigation involving the Ford 10R80 transmission used in vehicles from this generation. One of the commonly discussed concerns involves the CDF drum design in earlier 10R80 transmissions. My understanding is that Ford later revised the CDF drum design in subsequent production; however, when I contacted Ford regarding this transmission failure and requested assistance with repair const, they advised that my vehicle was not covered by any recall, customer satisfaction program, or warranty extension related to this issue. I am submitting this report so that my experience can be considered together with other reports to determine whether a broader safety-related defect exists.

ENGINE AND ENGINE COOLING — Filed 05/15/2026

The contact owns a 2018 Ford Mustang. The contact stated that while driving at various speeds, the engine sputtered with the check engine warning light illuminated. There was heavy white smoke coming from the tailpipe. Upon arriving at the destination, the vehicle hesitated to restart, and the contact observed a significant loss of coolant. The vehicle stalled while driving at various speeds. Upon inspection, the dealer confirmed coolant intrusion in cylinders #2 and #3, resulting in total engine failure. The manufacturer was notified of the failure and stated that the VIN was not under recall, and there was no warranty associated with the vehicle. The vehicle was repaired out-of-pocket by the dealer. The failure mileage was approximately 56,000.

ENGINE AND ENGINE COOLING — Filed 06/17/2024

The contact owns a 2018 Ford Mustang. The contact stated that the air conditioning system failed to function as intended. Additionally, the contact stated that while accelerating from a complete stop, several unknown warning lights were illuminated, and the vehicle chugged and failed to accelerate as intended. The contact pulled over to the side of the road. The vehicle was towed to the residence. The contact stated that the vehicle was inoperable. The dealer was notified of the failure and informed the contact that there was no recall or warranty coverage for the vehicle. The contact was provided an estimate for the repair. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and suggested to purchase a new vehicle. The contact declined due to the sentimental value of the vehicle. The failure mileage was approximately 69,900.

UNKNOWN OR OTHER — Filed 12/07/2018

The trunk wiring which powers the tail lights, brake and parking lights, turn signals, trunk light, and the back up camera is too short, and it stretches and breaks when the trunk is opened and closed. Ford is aware of the issue, but is unwilling to fix it. The back up camera was already recalled, but it and the trunk light are not working again because the trunk wiring issue has not been addressed. The biggest auto safety issue is that the tail lights, brake and parking lights, turn signals, and back up light could also fail due to the trunk wiring being too short.

ENGINE — Filed 03/17/2026

1. Component failed and availability for inspection: The engine assembly block failed due to a manufacturing defect known as "coolant intrusion into the cylinders." The vehicle and the defective engine are currently located at my residence and remain fully available for federal or manufacturer inspection upon request. 2. Safety risk: The safety of myself and others was severely compromised. Coolant entering the combustion chambers causes sudden, severe engine misfires across all cylinders, erratic power loss, and instantaneous stalling. Operating a vehicle where the engine can suddenly lose all power on high-speed roads creates an immediate risk of rear-end collisions and catastrophic traffic accidents. Furthermore, high-pressure internal coolant leaks pose an inherent risk of engine fires. 3. Problem confirmed by a dealer: Yes. The problem has been officially diagnosed and confirmed by an authorized Ford dealership service center, which documented internal coolant intrusion. 4. Inspected by manufacturer, police, or insurance: The component was inspected and verified by the vehicle manufacturer's authorized dealership technicians. It has not been inspected by the police or insurance representatives, as no crash has occurred yet. 5. Warning lamps, messages, or symptoms prior to failure: Prior to the diagnosis, the vehicle exhibited a "Check Engine Light." Currently, the vehicle is suffering from critical failure symptoms: the Check Engine Light is flashing constantly, the engine misfire codes are actively showing on all 4 cylinders, and the vehicle shakes violently at low RPMs (rough idling). These severe symptoms first appeared approximately 2 moths ago and have progressively worsened due to the coolant intrusion.

POWER TRAIN,FUEL/PROPULSION SYSTEM — Filed 04/18/2026

While completing a turn at a T-intersection, the vehicle experienced a complete loss of motive power for several seconds, leaving the car stationary in the path of oncoming traffic. The transmission (10R80) failed to engage, a known symptom of internal CDF Drum sleeve failure (TSB 24-2254). This follows a 'Green' inspection by a dealer on March 23rd where an axle seal leak and shifting issues were overlooked. The failure to engage gear during a turn creates an unreasonable risk of a T-bone collision.

ENGINE — Filed 04/06/2026

A check engine light turned on and the vehicle was taken to a local dealership. The check engine light was for an engine misfire and was diagnosed further. There was an engine failure due to coolant entering the system. Upon further research, I learned this is a common issue for 2016-2020 Ford Mustangs and it is due to a faulty engine design. The dealership is recommending a new engine install with a price tag of over 13,000 despite this being known to happen because of a badly designed engine with these cars.

ENGINE — Filed 04/03/2026

The vehicle was subjected to the “ecoboom” due to Ford’s lack of care when designing the engine. The car blew the head gasket and now requires an engine rebuild.

POWER TRAIN,WHEELS,SERVICE BRAKES — Filed 12/13/2023

I was driving down the road in my 2018 Mustang ecoboost. When all of the sudden slowing down it locked the rear wheels up. I slid off the road and fortunately I didn’t hit anything but it did pop my side skirt off in the rear of the car. Thankfully the person behind me reacted in quick enough time to get around me considering the rainy weather conditions. This is very dangerous. It’s throwing a code for a solenoid B. Had traction control lights. And says see manual. But they all illuminated after the problem first happened. The car has been parked for a while. However someone suggested I try this website. There were no pre warnings to what was going on. The car drove fine up until the point of it just randomly deciding to lock the rear wheels up. I still owe money on the car and have been paying for it for almost two years since it happened. The car has around 100k miles. I saw online where my car is not the only case. One of the cases the car almost got hit by a train. Yikes.

STEERING — Filed 04/23/2024

The contact owns a 2018 Ford Mustang. The contact stated that while driving at 63 MPH, the steering wheel was guided to drive forward, however, the steering wheel independently steered to the left direction. The vehicle independently accelerated and crashed into a concrete road barrier. The driver's rear and the driver's front area of the vehicle were damaged. The side air bag deployed both the passenger and driver. No injuries were sustained. A police report was filed. The vehicle was able to be driven away from the crash scene. The vehicle was taken to an independent mechanic who diagnosed the vehicle with an unknown steering part failure and the rear driver-side wheel bearing needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 46,000.

POWER TRAIN — Filed 10/23/2022

The contact owns a 2018 Ford Mustang. The contact stated that his son parked the vehicle and set the parking brake and exited the vehicle; however, the rolled away and crashed into a tree. The contact stated that after the failure, he researched online and found a recall for rollaway failures however, the vehicle was not manufactured in the date range of the recalled vehicles. The contact referenced NHTSA Campaign Number: 18V213000 (Power Train) as the possible cause of the failure. The contact spoke with the local dealer and was made aware that the manufacturer was very rigid when it came to vehicles that were not included in a recall even if the vehicle had experienced the failure listed in the recall. The contact was also informed that the manufacturer would not help if the VIN was not included in the recall. As a result, the rear bumper was dented, and the contact was unsure if the panel under the trunk was cracked. The contact stated that his son remembered shifting the vehicle into park and applying the parking brake. The contact stated that he heard a chime before exiting the vehicle but had not checked to identify the source of the sound. No injuries were sustained. No medical attention was required. A police report was not filed. The contact had assistance with placing the vehicle back into the initial parking space. The dealer was notified, and the contact was advised to schedule an appointment for the vehicle to be diagnosed. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and the contact was informed that the VIN was not included in the recall. The failure mileage was approximately 7,000.

POWER TRAIN — Filed 10/23/2022

******* DELETE VOQ ******* THIS COMPLAINT IS BEING MARKED FOR DELETION BECAUSE IT IS AN INADVERTENT DUPLICATE OF ODI# 11490557*DJR ******* DELETE VOQ *******

AIR BAGS — Filed 01/06/2021

I WAS IN AN ACCIDENT TWO DIFFERENT TIMES IN A MUSTANG AND THE MOST OF MY INJURY WAS TO MY LEFT LEG FROM THE AIR BAG. I AM STILL LIMPING FROM IT. IT CAUSED MASSIVE BRUISES AND A FRACTURE TO MORE THAN ONE AREA OF MY LEFT LEG. ON THE DRIVER SIDE. BOTH ACCIDENTS WAS ON A CITY STREET. GOING 35 MILES AN HOUR.

AIR BAGS — Filed 08/22/2020

I WAS INJURED IN AN ACCIDENT ON 8/22/20 WHILE DRIVING MY 2018 MUSTANG GT. THE SIDE AIR BAGS DID NOT DEPLOY...EVEN THE INSURANCE ADJUSTER AND COLLISION SHOP ARE WONDERING WHY. MY CAR WAS TOTALED...I DO NOT BELIEVE THE AIRBAG SYSTEM WORKED AS INTENDED. I WAS HIT ON THE DRIVER SIDE WHILE TRAVELING APPROX 30MPH, THE DRIVER THAT HIT ME STATED TO POLICE THAT HE WAS GOING 45MPH.

POWER TRAIN — Filed 11/22/2019

THE TRANSMISSION GETS STUCK IN GEAR WHEN YOU ACCELERATE HARD, YOU CAN'T TAKE THE CAR OUT OF GEAR AND THE CLUTCH DOES NOT WORK. THE ENGINE CONTINUALLY REVS/SPEEDS UP WHEN NO ONE IS TOUCHING THE ACCELERATOR. THIS IS VERY DANGEROUS AND NEEDS TO BE ADDRESSED RIGHT AWAY. THIS WAS DRIVING IN SPORT MODE, THIS HAS NO HAPPENED IN NORMAL MODE.

ELECTRICAL SYSTEM,ENGINE,FUEL/PROPULSION SYSTEM — Filed 08/15/2018

I PURCHASED A NEW 2018 FORD MUSTANG 2 DR 4 CYL ECOBOOST ON JULY 9TH 2018. ON AUGUST 15, AFTER HAVING DINNER WITH PARENTS AT THE HOUSE, I WENT TO VISIT SOME FRIENDS IN DAVIE AND IT WAS APROX 7:45 PM WHILE DRIVING ON A 4 LANE ROAD DIVIDED BY A MEDIAN. ROAD HAS FREQUENT SPEEDBUMPS AND THE MEDIAN HAS MATURE TREES. WHILE TRAVELING ON THIS ROAD - I FELT NAUSEOUS AND PLACED BOTH HANDS ON THE STEERING WHEEL AND SUDDENLY THE ROAD BECAME BLURRY AND I LOST CONCIOUSNESS AND STRUCK A TREE IN THE MEDIAN. THE CAR CAUGHT ON FIRE AND ACCORDING TO A POLICE OFFICER, HE TRIED TO REVIVE ME AND TO HELP ME GET OUT, HOWEVER MY LEGS WERE BROKEN AND INJURED. MY RIGHT LEG WAS BROKEN AND MY LEFT LEG WAS BADLY INJURED. I WAS WEARING A HIGH BOOT ON THE LEFT FOOT AND NO BOOT ON THE RIGHT FOOT IN ORDER TO BE ABLE TO DRIVE COMFORTABLY. SECONDS AFTER THE POLICE OFFICER REMOVED ME FROM THE CAR, THE CAR EXPLODED. I BELIEVE THAT I WAS SOLD A DEFECTIVE CAR THAT LEAKED POISENOUS GASES WHICH CAUSED ME TO PASS OUT AND CRASH I TO A TREE. HAD IT NOT BEEN FOR THE POLICE OFFICER, I WOULD HAVE DIED TRAPPED IN THE BURNING CAR.