Fiat 500X (2014–today)Faults of the start-stop system
Start-stop system of the Fiat 500X: problems and faults
In the Fiat 500X there are 2 documented faults of the start-stop system: infotainment system faults and electronic warnings (screen, Start&Stop, alternator) (rest of the car) and Start&Stop system faults (0.9 TwinAir and 1.0/1.3 FireFly engine).
- Medium severity: Infotainment system faults and electronic warnings (screen, Start&Stop, alternator) · rest of the car
- Low severity: Start&Stop system faults · 0.9 TwinAir and 1.0/1.3 FireFly engine
Most serious fault: Medium severity
Problems of the start-stop system on the the 0.9 TwinAir and 1.0/1.3 FireFly
From most to least important. Check the affected years and versions on each page.
Faults on the rest of the car
Documented on this model, from most to least important.
Symptoms these faults cause
Frequently asked questions
What faults of the start-stop system does the Fiat 500X have?
In the Fiat 500X there are 2 documented faults of the start-stop system: infotainment system faults and electronic warnings (screen, Start&Stop, alternator) (rest of the car) and Start&Stop system faults (0.9 TwinAir and 1.0/1.3 FireFly engine). Each fault has its own page with the affected years and versions, the symptoms and how to check for it.
Which engines of the Fiat 500X have faults of the start-stop system?
The documented faults affect the 0.9 TwinAir and 1.0/1.3 FireFly, and 1 fault is to the rest of the car. Check the years and versions on each page: they do not always affect every unit.
Have you had a fault of the start-stop system on your Fiat 500X? Tell us at what mileage and how much you paid. Report your fault.
Sources
Every fact on this page links to its source. If you find an error, let us know.
- Fiat 500X : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Fiabilité et pannes de la Fiat Panda (depuis 2012)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French