Fiat Mobi problems (2016–today)

We have documented 2 engines and 1 gearbox for the Fiat Mobi; the Dualogic gearbox has high or critical severity faults. None has a «Buy» verdict; the safest option is the 0.9 TwinAir and 1.0/1.3 FireFly, with a «With caution» verdict. Beyond the engine, the Mobi has accumulated safety recalls in Brazil, all handled at dealerships: the GSR automated gearbox sensor (2018), the ignition and injection relays (2018), the differential axle retainer (2017), the handbrake lever (2024) and the engine control unit (2025). The 2018 steering campaign affected only 9 units.

Among the 2 engines and 1 gearbox we have documented, none has a «Buy» verdict; the safest option is the 0.9 TwinAir and 1.0/1.3 FireFly, with a «With caution» verdict. A Fiat campaign from December 2022 replaced the fuel supply pipe, which can degrade especially with ethanol, on 143,474 cars from 2022 and 2023, including the Argo, Cronos and Mobi. The sources do not name the engine, but these cars use these versions, so it is worth checking with the chassis number that the replacement was carried out. We found no other engine-specific faults, but also no reliability analyses.^[1][2]

Beyond the engine, the Mobi has accumulated safety recalls in Brazil, all handled at dealerships: the GSR automated gearbox sensor (2018), the ignition and injection relays (2018), the differential axle retainer (2017), the handbrake lever (2024) and the engine control unit (2025). The 2018 steering campaign affected only 9 units. The most important documented faults are: intermediate shaft of the electric steering column with a faulty weld (2018 campaign) (steering, critical severity), handbrake lever that may fail to hold the car (2024 campaign) (brakes, high severity), GSR automated gearbox that can drop into neutral because of the gear selection sensor (gearbox and clutch, high severity) and ignition and injection relays that can stall the engine (2018 campaign) (electrical system, high severity).^{[3][4][5][6][7]}

The most important by severity and frequency, on the engines we have documented, are: actuator or hydraulic pressure fault: the gearbox drops into neutral on its own or refuses gears (Dualogic, high severity), premature wear or breakage of the Dualogic clutch (Dualogic, medium severity), sensor failures: lambda sensor and crankshaft position sensor (TDC) (1.0, 1.2 and 1.4 Fire, medium severity), oil consumption or leak, in one case from the rocker cover gasket (1.0, 1.2 and 1.4 Fire, low severity) and faulty ignition coil (misfire, engine warning light) (1.0, 1.2 and 1.4 Fire, low severity).

According to our rating by year, the best is 2026 (10.0/10); the worst rated is 2018 (6.7/10). Each year's rating counts only the engines sold that year and the faults that affect those units: open each year to see what changes.

Yes: we have documented 6 campaigns for the Fiat Mobi, such as stellantis campaign of May 2025: water ingress into the engine control unit (2025). Check with your VIN at the official service centre whether yours has been done.^[7]