Just had a quick play with Google Street Maps and was interested to see how peoples faces and car number plates are automatically blurred. However, what I also noticed is that the blurring only detects such features in the "current" frame. E.g. you see a car and then move towards it, the car is now at a good resolution and the plate is blurred. However, if you move back a step and then use the zoom button you can easily read the plate. So if your car in visible I would recommend you try this trick and then use the report a problem button to ask for it to be blurred (or removed).