What It Is
A billet crankcase ventilation (CCV) oil separator puck, replacing the factory piece that manages crankcase gas flow.
Why It's Worth Replacing
It separates oil vapor from the crankcase gases before they're routed through the intake system, so less oil residue ends up pulled into the intake tract over time.
Fitment
1999-2003 Mk4 Golf and Jetta TDI, and 1998-2003 Mk4 New Beetle TDI, all with the ALH engine code.
Common Questions
What does this part actually do?
It's part of the crankcase ventilation system, separating oil vapor out of the crankcase gases before they reach the intake, rather than letting that oil pass straight through.
Does this fit the BEW engine too?
No, this specific puck is built for the ALH engine code only.
Is this a billet upgrade or a stock replacement?
It's a billet part, machined rather than the factory's original design.
