UniAir valve-control module failure
Misfire, rough idle, engine warning light, weak acceleration or a sudden drop in smoothness.
How to check
Start it from cold, let it idle, then accelerate gently through the mid-range.
Estimated Repair Cost
£1,400
Explore common problems, estimated repair costs and practical checks for the 2014–2015 Fiat 500 0.9 Petrol Manual. Use this guide to help assess a used car, then unlock a personalised report for the exact vehicle you're considering.
Misfire, rough idle, engine warning light, weak acceleration or a sudden drop in smoothness.
Start it from cold, let it idle, then accelerate gently through the mid-range.
£1,400
Rattle on cold start, rougher running, timing-related warning light or a generally harsher engine note.
Start the engine from fully cold and listen for the first few seconds.
£1,100
Boot release stops working, rear wiper or washer fails, or rear electrical items work intermittently.
Use the boot release and rear wash-wipe during the viewing.
£350

It can be, but only if the individual car backs it up. For the 2014–2015 Fiat 500 0.9 Petrol Manual, treat model-level patterns as viewing priorities and let condition, history and inspection evidence decide.
The problem cards above list the model-level checks for this guide. Read them as priorities for inspection and paperwork review, not proof that every example will have those faults.
Look for evidence, not just assurances: MOT advisories, service history, repair invoices, warning lights, fluid leaks, tyre and brake condition, and how the car behaves on a proper test drive. And of course, look at your personalised Should I Buy This Car? report, outlining a full list of common issues in detail, a personalised road test, a plain-English explanation and a MotorIQ score.
The guide above gives you the model-level pattern. A personalised MotorIQ report checks the registration-specific record and turns it into an ownership view before you commit.
Or enter the vehicle manually