There are 4 owner-reported powertrain & transmission complaints for the 2018 Fiat 500Xin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
THE Transmission Valve Body Solenoid was diagnosed as not working. while i was driving on the highway without any indication the car just started slowing down . There was not a warning or anything, then the transmission service lights up, i had to have my car towed to a dealership however they informed me that there was never any service they were supposed to do on my transmission because of the type of vehicle i have. this part is expensive and not easily obtainable. car is still showing transmission issue.
I purchased my 2018 Fiat 500X POP used in April 2023 with only 22k miles. This past weekend 12/16 when I would first start my car up and get ready to leave in the mornings after having been parked for the night, my car would start up normal and I could proceed down the street. The minute I apply the break my car would lose power, stall out or shut off completely. I would press the start button, release the break, shift the gear to drive and proceed forward. I would go about 20 mph as I was driving in a residential area then my car would stall out and shut off again leaving stuck in the roadway. I repeated the start process to pull over to a safe location. I called the dealer and they said there are no recalls for this issue, however, I located one, but my VIN is not coming back as one of the affected vehicles. This is extremely dangerous as I live in an area with freeways as the only way to get to certain areas and cannot have this vehicle shutdown on freeways because it could result in a bad accident. I am looking for any assistance I can receive from this complaint. Fiat is not helpful, and the closest dealer is 2hrs from my residence.
There is an active recall for the power train control module for this car but it is not showing up in the NHTSA list. https://static.nhtsa.gov/odi/rcl/2018/RCRIT-18V524-1313.pdf identifies the specific recall for the powertrain control module for the Fiat 500X https://www.nhtsa.gov/vehicle/2018/FIAT/500X/SUV/2WD#recalls lists the recalls done for the vehicle and it does not list the powertrain control module recall issue. We just bought this car from CARMAX and looks like this campaign recall fix was not listed on the site so they didn't address it and now the car wont work or run. If the recall was listed by the VIN they would have been required to fix before selling.
WE HAD SEVERAL INSTANCES WERE THE CAR BUCKS WHEN TRANSMISSION SHIFTS. WAS TAKEN TO DEALER AND UPDATES WERE MADE AND HAD NO ISSUES UNTIL AGAIN IT HAS STARTED AGAIN. NOT ALL THE TIME BUT EVERY ONCE IN A WHILE. AT SUNSET NOW BUT UNABLE TO DUPLICATE PROBLEM. THIS IS NOT THE FIRST ISSUE WE HAVE HAD. FIRST IT WAS THE FUEL TANK
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026