Johan_

Just to give an update: about a month ago I got bilstein B6 mounted at the back. It's very good to have suspension back, but I also see the downside. For most of the ride there is no difference, so in that sense I'm still happy that I spend just over 400 ont he Bilstein instead of just over 1000 euro for the original. But for short steep speed bumps the back of the car is more jumpy and less comfortable, enough to let traction control kick in sometimes. Makes perfect sense for sport damping (they're also suitable for lowered suspension), but the car doesn't feel any more sporty, so there's no upside besides the lower price. In hindsight I maybe should've gone for different aftermarket dampers, but in practice the difference is small, and I'm still happy I saved 600 euros on a car with a 8k euro value if the lifetime of the dampers is good.

Just to check: it's no problem to have Bilstein B6 at the rear while keeping the original at the front?

I know I'm reviving an old topic, but I think the content is relevant I have a 2009 IS 220d and my left rear shock absorber has leaked so much that speed bumps need to be taken slowly. looking at https://www.toyodiy.com/parts/p_E_200901_LEXUS_IS250~350~2xxD_ALE20L-AEFLYW_4804.html (found by putting in my VIN) the replacement part number is 48530-80509 MARK 48530-53270. Googling a lot shows 48530-80509 is the toyota/lexus part number for the Tokico 48530-53270 part number. Finding that part is near impossible and they're 360 euro a piece at the dealer. So my question is: if I look at the cross reference: https://www.toyodiy.com/parts/xref?s=48530-80509&mE=on I see a large list of models, if I click I them I see the following part numbers for the rear shock absorber: 48530-80506 MARK 48530-53240 48530-80286 MARK 48530-53130 48530-80290 MARK 48530-53140 Are these compatible as well? That would widen my search range. If there are other genuine compatible part number, how would I be able to find these? Other option is that I go for a different brand, then I have do dive into the world of which aftermarket brand is good and which isn't, and if there are compatibility issues there as well. Any help on getting a new part is much appreciated!