Hi Guys! First post

I brought my beetle a few months ago...when I purchased it was told by the seller it need a new airbag sensor which would cost me $150AU (not much really!)
On further inspection from an Auto Electrician they told me I needed an airbag module in the computer replaced...$1300! So i've gone ahead and spent the money getting it fixed....only to find that the light has come back on!! You can imagine my frustration!
Anyways...after having it back to the same place twice they basically have no idea why. They've told me that there is a code coming up for the passenger side airbag.
Can anyone suggest any ideas as to what this may be...as the professionals dont seem to have a clue!

Cheers