Part number 99610685005Source-mentioned candidate. Verify fitment and availability independently.
Cited source accounts
anywhere, when I did my early '98 build update I needed to change the metal pipe as well. That said, the 996 106 850 05 hose was the correct fit for my coolant expansion tank so I did not need to update that, just the metal pipe that runs under the rear of the engine.
Replace the coolant expansion tank
This is a source reference. Confirm exact model applicability in the original material.