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996 / Engine & intake

Porsche 996 911 Air Oil Separator and Hose Replacement

Replace the air oil separator (AOS) and associated hoses on a Porsche 996 911, demonstrated on a 1999 Carrera. The manual covers engine support, intake and accessory removal for access, separator and line replacement, and reassembly. Additional access work depends on whether you replace only the separator or the associated lines.

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FCP Euro254 source-derived steps · Check procedure and vehicle applicability
YTAI / Framewise
Written manual

Read the free Fullymatted video manual with source timestamps · Original video: FCP Euro.

At a glance

Replace the air oil separator (AOS) and associated hoses on a Porsche 996 911, demonstrated on a 1999 Carrera. The manual covers engine support, intake and accessory removal for access, separator and line replacement, and reassembly. Additional access work depends on whether you replace only the separator or the associated lines.

How we use sources · Steps follow the credited source; they do not establish independent verification or exact vehicle fitment.