Just replaced the rear shocks (which have air levelling) on our '05 Park Avenue which only has 32000 kms on it. Disappointed that the originals were gone already, but at least the new ones were easy to install. I used Monroe Max Airs, as I have had good luck with these on our two previous Buicks, and they are inexpensive. My daughter was complaining about feeling sea sick last weekend on a 1100 km trip. The car rides much better now, so she should be happy on our next trip. Front struts are fine, they should be good until 75000 kms hopefully.