Bought lx470 with 250000 miles, ride was very bouncy, AHC goes L to N to H with no issues although the marks at reservoir only moved 4 to 5 marks. Went ahead and changed 4 accumulators with aftermarket (maybe bad idea), followed instructions depressurizing the system, changed globes, and then bleeding each corner, AHC still goes from L to H with no problem but I'm still only moving 4 marks at the reservoir, and the ride got worse very rough and stiff ,I did notice when going from L to H at the reservoir when the pump stops working there's a visible "burp" in there, is this normal? or could I be getting air through there?