Help!!!!!

Hi, not long bought my first Range Rover, 1998 's' 4.0 SE. Been running beautifully for the past 8 weeks, but the other day the suspension went down and now has real trouble lifting back up again. i have had no faults appear on the dash and the compressor lifts the back up to top level with no problems, its the front that has the problem, when raising i can hear a leek from the passenger side, is this the airbag? does it need replacing? is it a big job, is this the problem?? thanks luke!!

welcome luke, no not big problem you need two new front bags. need doing asap..

Thanks, Ideal, and thats more than likely the problem? like i say the back goes up fine, googled changing the them and it looks like a small job not taking to long, do i need both sides or could i get away with just doing the one?