UNKNOWN -- I was turning 90 deg from the street into my 30' driveway, going very slow as usual with foot on brake pedal to slow further before entering the garage (the door had just finished lifting). But as I was straightening the steering coming out of turn, the car suddenly accelerated, brakes and steering both were unresponsive and the car smashed into the garage. Slowed further by the impact, the car caromed into the garage stairs smashing them to pieces before coming to rest against the rear garage wall after I hit the OFF button (it's an EV). There was no alert from the onboard systems of a pending crash and the air bags did NOT deploy. I was uninjured. Posting my accident on a social media owners group, other owners have had similar experience of the electronics going out while driving. The car remains at a 45 deg angle inside the garage now 6 days later awaiting the insurance company to come and extricate it for their assessment of the damage to the car.