I don't have the X1 but I'm willing to trade all 3 of the following cars for just the Mazda if no-one wants to give you the X1
Nissan WOODONE ADVAN Clarion GT-R (SUPER GT) (fully tuned)
Ferrari 430 Scuderia '07 (fully tuned)
McLaren F1 '94 (zero mileage)
x1 only
X1 is worth nothing ( along with every other car you can gift in the game ) now you can back up the save file before trading and restoring afterwards.