So I have a nail in my front left tire on my 2015 MS P85D, just off the tread (sidewall) so not repairable. Tire shop says that since its AWD I need to replace all four tires. I think I understand the logic, at least on a conventional ICE AWD vehicle. However, given the the front axle has a separate drive system (motor) from the rear axle, I wonder if I can get away with just replacing two tires (one axle)? Thoughts?