I've had my X5 3.0sd (your35d) since April 08 over here and before that a 535d for 3 years.

No engine problems at all despite the remap on my 535d

Great cars

__________________
Currently :
2008 X5 3.0sd M Sport
2008 Audi TTR 3.2 S-tronic
2008 Lotus Exige S
2010 Lincoln Navigator (in the US)
Past:
2005 535d M Sport Tourer
2005 Audi A4 3.0 Quattro Convertible
2006 Lotus Elise