My Disco II recently began sagging on the rear passenger side at times after the ignition is shut off. Now it sags in the rear sometimes when turned off. I don't think there is an air leak because it sometimes holds air. Is there a sensor or switch that mighthave a problem?

 

Post in the Discovery section if you want to make sure someone answers your question.
Mike

 

are you parking then car on level ground ? it could be the height sensor also, alot of disco 2's have dodgy height sensors making the airbags do what they want