Fiat 500E vehicle braking behavior is unexpectedly hard, sudden, or unpredictable until the user uses an obd scan tool with appropriate diagnostic software- and initiates brake controller sensor re-calibration. This option is found under the diagnostic menu under: ABS>renenerative brake controller>active diagnostics, and then selecting the procedure to start (rbc sensor calibration). Online forum users (please see link below) are currently using 3rd party software, at their own expense, to correct the braking deficiency (approximately $49). My personal vehicle was purchased used and was exhibiting sudden and unexpected braking issues at approximately 8,500 miles; this is in my opinion a very low number of miles to be experiencing regenerate braking and control issues. Please reference the ongoing discussion thread at Fiat 500E online forums: Https://www.fiat500owners.com/threads/fix-grabby-brakes-for-70.149282/#post-1292483

- Columbia, SC, USA

On multiple occasions my wife's care has refused to srmtart with now answer from the dealership why, the brakes have been replaced by Fiat under warranty and they still squeak when in reverse, and lately it says there is a tire sensor that is damaged or low along with drive mode unavailable, this keeps us from using the AWD system effectively, and Fiat said they fixed the issue once before and it came back within the week. The car has had electrical problems from the day she bought it along with multiple occasions with not starting and multiple computer problems with now help from the dealerships, this car is still covered under all warranties and still causes problems with my wife going to work. On two occasions the drive mode unavailable error came up while driving, this doesn't allow the car to operate the AWD system like it should

- Joint Base Lewis Mcchord, WA, USA

The vehicle was approaching a stoplight at approximately 15 mph and suddenly accelerated while the brake was depressed, causing a minor accident (little damage to bumpers of both vehicles). Car was returned home (1 mile away) without incident. Upon moving the vehicle in the driveway later that same afternoon, the vehicle suddenly accelerated again when depressing the brake; had to engage the parking brake to bring the vehicle to a complete stop.

- Pooler, GA, USA