Originally Posted by dkl

While it may be very common in Canada, it's not common to see it in the US for e53 since it's a dealer installed option which almost no one takes. Although, it's becoming more common for e70 and newer X5 since BMW made it a factory or port installed option. I paid about that much for it 18 years ago and that was with a discount. BMW listed it for about $800 IIRC.