Nope. There’s no extra cost to the parties. The manufacturer is already liable for the damage their product does if it is defective, or fails to perform. There’s “liability insurance” for the “dumb” Tesla too. Remember, the driver is already responsible for all the damage that they cause through failure to properly use the product - all autonomy might do is shift some of that from driver to manufacturer, but it doesn’t create any new cost to the driver-manufacturer exchange. To the contrary - by definition in this scenario the AI driver is significantly more safe than a human driver. The costs of insurance between driver and manufacturer are lower, not higher, with autonomy. It’s not going to be reasonable for Tesla to withhold that.
This is especially the case because unlike airbags (or many other safety features), actual autonomy will protect people who aren’t the purchaser of the car - and are thus strangers to the economic transaction altogether. They deserve for the parties to that transaction - manufacturer and purchaser - to make the reasonable choice in safety.