B9 platform

Audi S4

Explore the 2018 Audi S4 build, maintenance tutorials and the modifications shaping this fast, understated daily driver.

Complete build ledger

2018 Audi S4 Build Page

Installed parts, current direction and future changes for the B9 S4.

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Routine service

Maintenance

Air Intake Filter video thumbnail

Intake service

Air Intake Filter

A quick B9 intake-filter service walkthrough.

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Cabin Air Filter video thumbnail

Interior service

Cabin Air Filter

Replace the B9 cabin filter without guesswork.

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3.0T Oil Change video thumbnail

Engine service

3.0T Oil Change

A complete home oil-service guide for the 3.0T.

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Performance upgrades

Engine & Boost

3.0T GFB DV+ Upgrade video thumbnail

Boost system upgrade

3.0T GFB DV+ Upgrade

Install the GFB DV+ performance upgrade on the B9 3.0T.

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