cartechboy writes: Tesla had a mixed bag last year when it came to headlines. The good news was the Model S received a top safety rating, but the bad news came with three of those electric cars catching fire after receiving damage to the battery packs. Now another Tesla Model S has caught on fire, but this time the car was parked and unplugged. The fire happened earlier this morning in the owner's garage in Toronto, Ontario. At this time no one knows what sparked the fire, but we do know the vehicle was only about four months old. Again, it wasn't plugged into a charging station, and it wasn't turned on. Parked. In a garage. With no one near it. Interestingly, the battery on this particular Model S was unscathed by the fire. In fact, the Toronto fire department says the fire didn't originate in the battery, the charging system, the adapter or electrical receptacle since all of those components weren't touched by the fire. So, how did this Tesla fire happen, and will this blow up into a larger issue for the new automaker?