The X5 will have had 4 years in service this November and is right around 63,000 kms now.
I'm getting a muffled clunking on washboard surfaces/broken pavement. It is especially noticeable at low speeds (sub 40kph) and if there is any side to side movement or while turning. Suspension link or sway bar bushing maybe?
I'm also noticing slight hesitations (fleeting but noticeable) under hard acceleration (foot to floor like when merging onto a 4 lane)
I'll give the dealer in Moncton a call and see about getting it up there for diagnosis.