If you're close enough to buy, I suppose you're close enough to get it maintenance and fixed across the border. I doubt you can go to AutoZone and pick up a generic part. Although with a vertical integration, that's that's happening in the U.S. too.

The US market response? Hide, pretend they're not there:

  So far, the many Chinese car companies that want to expand into the U.S. have been kept at bay.

  The U.S. has applied sky-high tariffs to vehicles imported from China, and regulations make it nearly impossible for such vehicles purchased in Mexico to be registered in the U.S. A trio of senators has urged the Trump administration this month to ban Chinese vehicles sold and registered in Mexico and Canada from entering the country; several dozen House lawmakers sent a similar letter this week. A Senate bill to prohibit China’s carmakers from building cars in the U.S. is being crafted. 

and complain about subsidies:

  Auto executives and lawmakers say China has created an unfair playing field, with heavy government subsidies and ultralow labor costs. In addition to applying tariffs, the U.S. government banned Chinese-connected software in new cars. 

It's true that China as a state supported the PV and EV industries to the hilt in order to get those industries started. It's also true that EV subsidies from the Chinese government have dropped to near zero in recent years and that many of these EV's are assembled in workerless factories and self drive out the door and park up ready for transport.

I stand by the US Government with its concern over external wireless connections to cars and hope they extend any such bans to _all_ cars unless specifically requested by buyers.

Curious how hard or easy it would be to register a Chinese car. Not curious enough to mess with paywall bypass.