From : CoyoteX3

BMW semble, après les nombreuses critiques de la presse automobile et des clients, avoir modifié les rêglages des suspensions sport sur les modèles 2005, la rendant ainsi aussi confortable que la standard, tout en évitant le tanguage que j'avais ressenti avec cette dernière.

C'est un préparateur de voitures dans un garage BMW US qui parle, et croyez-moi, pour avoir lu pas mal de ses posts, il sait de quoi il parle:

"This is my finding after new car prepping 2005:

X3 Sport Package for delivery this week:

.......................................................................
for 2004 , the info on Sport Package suspension bits:
-----------------------------------------------------------------------
anti-sway bar front dia. 23.6 mm
anti-sway bar rear dia. 18.7 mm
front coil spring wire dia. 14.4 mm (same as non-sport package)
rear coil spring wire dia. 17.5 mm ( .4mm thicker than non-sport)
front shock # .... 110+800 (different than non-sport)
rear shock # .....81.49.0.300.516 ( different than non-sport)


The seat of pants feel of tiny to small road bumps is a "sharp" or "hard edge" feeling to tiny impacts

.......................................................................
for 2005 , the Sport Package suspension bits:
-----------------------------------------------------------------------
anti-sway bar front dia. 23.5 mm
anti-sway bar rear dia. 18.5 mm
front coil spring wire dia. 14.6 mm
rear coil spring dia. 17.4 mm
front shock # ........260+800
rear shock # ..... 81.49.0.300.843

The seat of pants feel of the 2005 Sport package over small road bumps is "soft" or "rounded edge" feeling . Much nicer indeed ......