2016 Fiat 500X engine problems

Filed Jun 16, 2026 · Electrical, Engine · CA

3 times my car had died going under 30 mph, it must turns off or goes into this neutral position and won’t let me change gears, when i restart it, the engine makes an awful squealing sound. all these “drive mode unavailable “ “check esc system” “service electronic brake” it seems it is related to the S55 / 16V529000 safety defect …. “intermittent switch to neutral while driving”

Filed Jan 12, 2026 · Electrical, Engine · 144,000 miles · FL

The contact owns a 2016 Fiat 500X. The contact stated that while driving at an undisclosed speed, the transmission unintendedly shifted from drive(D) to neutral(N). The RPM became elevated; however, the vehicle failed to accelerate as intended. While driving approximately 15 - 20 MPH, the vehicle went into LIMP Mode. While in LIMP Mode, the contact coasted to the side of the road and waited for several minutes before continuing to drive. The failure had occurred twice. Additionally, the check engine warning light illuminated intermittently. The vehicle had been taken to a certified mechanic, who determined that the transmission had failed and needed to be rebuilt. The dealer also diagnosed that there was a failure with the instrument cluster. The instrument cluster lights were cleared; however, the transmission was not repaired. The check engine warning light remained illuminated. The contact was made aware of the federal safety agency Campaign Number: 16V529000 (Power Train), for the transmission for the same year, make, and model. The manufacturer was made aware of the failure and confirmed that the VIN was not included in the recall and opened a case. The failure mileage was approximately 144,000.

Filed Nov 11, 2025 · Engine · KY

While driving, the vehicle suddenly shut off completely in the middle of the road, forcing me to come to a full stop and make several attempts before it restarted. During the incident, all electrical power was lost—I was unable to use hazard lights or blinkers, and I’m unsure if the brake lights worked when pressing the pedal. This created an extreme safety risk to both myself and other drivers. About a month earlier, the same issue occurred and the dealership diagnosed it as a “battery, fuse, array” problem, replacing the battery. The same issue has now returned, and the dealership has identified it as a MultiAir actuator failure. The vehicle is a Fiat 500X equipped with the 2.4L Tigershark engine, which has known problems with the MultiAir system. The car has only around 60,000 miles and is currently at an authorized Chrysler/Fiat dealership, available for inspection upon request. The problem has been confirmed by the dealer, no warning lights appeared before the failure, and a technical case has been opened with Fiat/Stellantis corporate.

Filed Jul 30, 2025 · Electrical, Engine · NY

I am writing to you in regard to my 2016 FIAT 500X about multiple concerns. 1. There has been an open recall on the Emissions system since 2022. I immediately followed up and was put on a waitlist as I was told that the parts were on back order. I was told I was 27 on the waitlist. I followed up every 3-6 months for an update on getting the recall repaired but was told they have no update on the parts. It is now 2025 and my registration and inspection are expired. I was informed by FIAT service mechanic that the open recall should not impact my inspection. Upon bringing it in for inspection, I needed to get the thermostat replaced, which was one of the first recalls that was rectified upon purchasing the car in 2017. My car failed inspection. I followed up with FIAT corporate and was assigned a case manager who followed up as well unable to rectify the situation. Now my car is unsafe to drive, I have gotten a ticket for expired inspection . I told the officer that there is an open recall and that I am at the mercy of FIAT. Secondly since I purchased the car I have brought it back multiple times, expressing concern that the car lags when you press the gas. If I am merging on the the highway and I am going 30mph the RPM will struggle to go over 3 in order for the car to accelerate and then it falls to 1-2 RPM. Attached are numerous photos of my constant communication of presenting issues. The entire electrical system will turn on and off on its own. Error I have gotten speeding tickets always when trying to switch lanes or am preparing for the exist because I have to compensate for the lag otherwise I will get smashed by another car. When driving 25-40 mph the engine will make a humming sound as if it is stuck in a gear. So my options are 50+ or 25 or less. Living in NY this is very difficult. I have even advocated that I believe my car is apart of the 2016 transmission recall on my particular make and model. My car is unsafe to drive and I need some guidance

Filed Jul 2, 2025 · Engine · CA

Oil level dropped way below minimum. The current consumption is 1000miles every quarter

Filed Jun 17, 2025 · Engine · CA

The car consumes a lot of oil. After 4000 miles I was under 3.5 qt and the oil pressure light would go off

Filed Jul 31, 2024 · Engine · FL

Hi, I received a recall notice from FCA regarding oil consumption - I threw the letter out, but took the car to dealer. They found the active recall W-80, , had me do the 1500 mile test, came back but for some reason, now it is not even visible anymore. Now my check engine light is on and the oil light is on. My engine is over consuming oil and now I won't be able to repair it. I escalated it to FCA, but they can't see it either and are unable to help me. Need this to be resolved, but don't know how to.

Filed May 21, 2024 · Electrical, Engine · SC

The day after we had a bad storm, my car's electrical system went haywire. I was driving to work and all kinds of warning lights started flashing. Then when I came to a stop sign, stopped, then proceed to go again the car car would not go. I was still in drive but the car would not go when I pressed the pedal. So I put the car in park then back in drive and it started driving again. Then a warning came on about my power steering. I get further down the road to a stop light. I stopped and when the light turned green it would not go again while it drive. So I put it in park and back in drive and it went.i get to a stop sign about 1 mile down the road and my steering wheel locked up. So I put the car in park and back in drive and it started turning a little bit so I was able to pull off the road into an abandoned parking lot. I tried to turn the car off and it would not turn off. So I unhooked the battery cable and it cut off. I had the car towed to my house. They hooked the cables back up yo get the car onto the tow truck. Once the car was home, the wheel was fine but it had some warning messages on the dashboard. So the next day it rained again. And I went outside later that evening and my tail lights and the dashboard was illuminated. My air conditioner was running but the car was not crank. So I finally got it to the shop and they are saying water got into the RHA hub; but how? I don't have a leak in my car. I've never seen water in my car and on top of that, why is my RHA hub in the trunk? Anyway, after that I looked it up and come to find out a lot of people with Fiats have been having the same problem. And they are just as upset and lost as I am.

Filed Feb 13, 2024 · Engine · CA

The car had a NTSB recall on the engine. The engine needed to be replaced. After having the engine replaced I was told to pick up the vehicle which shook profusely and then had a check engine light come on only minutes from driving away from the dealership. I turn around and returned the vehicle immediately to have it remedy the situation. It took over a month and the second time I was told to pick up the car, the same thing happened again only minutes from leaving the dealership, except this time the engine started to stutter like it was going to stall. After another month of them attempting to remedy, which is now the 3rd time they told me to pick up the vehicle which was in 22nd December 2023, the engine stalled only 100 yards of driving away from the dealership in fast 2-lane traffic. The progressive deterioration of the new replaced engine after the required recall was and is clearly a danger not only to myself and my family but also to other drivers. They are now saying which is 13 of February 2024 over a month of them trying to fix it, that the car is ready to be picked up. I do not believe this vehicle is safe to be on the road. I am concerned for myself and other drivers safety if I attempt to drive this vehicle. I have been told it has been tested but they said that the other 3 times I have picked up the vehicle. There is no way to ensure or guarantee this vehicle will not stall again in dangerous traffic. I have a video of the incident with the foreman mechanic trying to start the vehicle.

Filed Nov 22, 2023 · Engine · TX

Low oil pressure sensor light is on, came on after car reached 100 thousand miles. Interior glue melted on the doors and roof from the heat and are bucking, I feel is poor manufacturing.