https://repairpal.com/porsche-repair-in-san-diego-california
With this vehicle and your concern, I defer to an actual Porsche expert. Refer to that Directory link to find a shop that lists Porsche service near you.
RepairPal Certified shops can diagnose and repair your 1999 Porsche Boxster. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
I realize this post is old so current pricing to replace rear wheel bearings at my Chgo.area import shop is $650 per wheel.Labor est.is 5 hrs.and bearing cost 70 to 140 if S model.Is good idea to pack new bearing even though its sealed.