When ordered with the car, MSRP on Space Saver Spare (option code 200) is $150 and invoice is $135. I know these can be ordered from Tischer and others; $300 may or may not be in the ball park. (Remember, you need a scissors jack, wheel chocks and lug wrench too; the wheel won't do you much good if you have no way to pull the flat tire off the car).

But why would you want to risk a used tire from a junkyard, even if you could save $100 or so? If you got a flat late at night in a bad part of town, would you really want to learn "the hard way" that the spare Shady Lefty's Auto Salvage sold you didn't work?

My 2 cents: spend the extra $$$ for new, hope yo never need it, then sell it on eBay or Craigs list when you switch cars.

__________________
2011 X5 35D Deep Sea Blue / Oyster
2008 M3 Vert Silverstone II / Black Novillo, 6MT
2008 X5 3.0 Platinum Bronze / Sand Beige Dakota
2007 X5 3.0 Space Gray / Gray Dakota (Retired)