You would never want to replace just one accumulator. It is like replacing one shock. They're about a hunnert bucks apiece, and then you KNOW you are good there for a long time. They make a huge difference! With things working properly, there is no bounce AT ALL, and it absorbs bumps and dips beyond what you think it could do.....

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Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John