Fiat 500
Modern 3-cylinder turbo engine with innovative FireFly technology, technically complex in design. The integration of EGR into the MultiAir unit makes repairs disproportionately expensive. The mild hybrid system shows early-phase weaknesses with the 12V battery. As a relatively new unit, long-term experience is still limited.
Modern City Runabout
Three-cylinder turbo in the lightweight 500 Hybrid: nippy, economical, and with mild-hybrid boost surprisingly lively. Fiat driving without a guilty conscience.
Engine Weaknesses 4
On the FireFly 1.0 T3, the EGR is not available as a separate part. If the exhaust gas recirculation solenoid valve fails, the entire MultiAir unit must be replaced. Cost over €2,000.
Symptoms: Engine warning light, power reduction on motorway, check engine message
The small turbocharger of the 1.0 T3 shows noticeable turbo lag on pull-away and is wear-prone with overly long oil change intervals. Reports of whistling noises increase above 100,000 km.
Symptoms: Turbo lag when accelerating from low revs, whistling or hissing noises, power loss
Individual reports describe increased oil consumption and blue exhaust smoke, indicating piston ring or valve stem seal wear. Unusual for a relatively new engine.
Symptoms: Falling oil level between service intervals, blue smoke from the exhaust especially on cold start
The mild hybrid automatically deactivates start-stop and energy recovery as soon as the 12V main battery drops below a threshold. Happens regularly with short-trip use and cold temperatures.
Symptoms: Start-stop not working, hybrid display inactive, charge level indicator at lowest value
Vehicle Weaknesses 13
The semi-automatic Dualogic gearbox on the Fiat 500 (312) tends to jerk when shifting, drop into neutral unexpectedly and fail completely. Control unit replacement costs 2,000–2,400 Euro.
Multiple recall actions on the Fiat 500 (312) involved defective brake hoses, incorrect brake torque and non-compliant brake pads.
Recall action on the Fiat 500 (312) for faulty airbag wiring that could impair correct deployment of the driver's airbag.
Sills and wheel arches on the Fiat 500 (312) rust faster than average, especially with regular winter use and road salt exposure. Paint corrosion at sill edges from as early as 5–7 years.
The electric power steering on the Fiat 500 (312) can fail intermittently. Water ingress into the steering rack has been documented, which in the worst case can lead to complete seizure.
Recall for faulty seatbelt pretensioner activation. Pretensioners could fire too late or not at all in a collision.
Control arm rubber bushings and ball joints wear faster than usual on the Fiat 500 (312) and regularly draw attention at MOT. Typical problem from around 60,000 km.
Electric window regulators on the Fiat 500 (312) fail frequently, typically due to cable break or motor failure. Repair by a mechanic costs 150–400 Euro per side.
The rear silencer on the Fiat 500 (312) rusts through within a few years, especially in short-trip use, as condensation water accumulates inside.
Brake discs and pads on the Fiat 500 (312) wear faster than average and frequently fail inspection for insufficient braking performance.
The AC condenser on the Fiat 500 (312) sits exposed behind the grille and is vulnerable to stone chip damage causing refrigerant loss. Condenser repair costs 400–800 Euro.
The wiring loom in the rubber grommet of the Fiat 500 (312) tailgate breaks due to constant bending. Typically affected are tail lights, brake light and rear window heating.
The lighting system on the Fiat 500 (312) fails inspection at above-average rates. Misadjusted headlights and defective light elements cause MOT failures.
Reports & Tests
805 owner complaints filed with NHTSA (2007–2023). Most reported: Powertrain (386), Electrical (135), Engine (108).