I can't say how long it will last, but I just had mine resealed. Parts are about $35.00 - $40.00 and it involves approximately 4.5 hours labor. I fully expect the seals to last many years and many miles.
No more steering fluid leaking on the garage floor and during the reseal the wormshould be set back to spec making for a "like new" steering feel.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.