A slight tear in the buckle strap…
I’ve been using Ortlieb products for 15yrs+ and never had a failure until one of the buckles that closes my roll top panniers started to tear.
Getting a set of spare buckles was easy…
I bought all my Ortlieb panniers from Wayne at the Touring Store so I emailed him and he sent me a set of brand new buckles.
Fresh buckle installed…
Ortlieb products are easy to work on so it only took two screws per pannier to remove and reinstall the new buckle. I did both panniers since I had two fresh buckles on hand. The whole process took about mins to complete.
Ortlieb repaired and ready to rumble…
Now these panniers are 100% I’m packing them for my Baja trip. There is a lot of beer and ice to be hauled! 
Nice one.