Hi all well, i have air suspension at rear alone and once side sagged a little while ago, but then rose as if my miracle, last week both sides sagged at rear but then raise up on turning key.

Today both sides are down accompanied by a hissing sound from the right hand side, safe to say they are kaput? is there some miracle tube that may have cracked that can be replace? or do they just go at the mileage I have 100k miles and neary 19 years with last 13 spent it a very hot place.

Is is 'ok' to replace them with could springs if needed? and what should the installer be aware of? ANY pointer much appreciated

PS if it has sagged by the same amount on both sides at rear both bags are buggered so to speak yes?

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E53 X5 3.0d SUV prod.date 11/2004 eng.variant M57N Europe Right hand drive N