skylinrcr01

Why are they supposed to be replaced in pairs? Do they handle air levels differently than the Bilsteins or something?

kenneyd

They are different in their valving and function. The most obvious different is they lack the external reservoirs . The rear of the e55 only has one height sensor, so it opens and closes the valves on both shocks at the same time. they must contain the same amount of air and fill/deflate at the same rate

Hulk

Pretty much sums it up

I have seen a few people do one at a time but don't know if it affects them since they don't drive them much

tw2

Excellent upgrade if you have a reservoir leak.

skylinrcr01

That totally makes sense. Thanks for cleaing it up for me.

skylinrcr01

I think I may, my Passenger rear droops overnight. Guess i need to buy a couple shocks.

Yuille36

If my car has been sitting for a day or two, it will sit low. Not quite a low rider! This is normal, when I start the car up, the suspension will raise to it's correct ride height. So you may not have a air spring issue, as you first thought.