Damn, that's a slick trick up your sleeve! Let me put some X6 badges on some beat up X3s. And if I get rich doing it, I owe you a giant big mac.

Back to the OP, I surely hope the reason you are replacing the roundels is NOT to replace the white and blue with other colors, cause all you need to do is to buy a $15 kit of vinyl precut to fit the roundel. I have black & white, looks hot on a sapphire.

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X5 35i Sport, Black Sapphire