Audi · Forced Induction

Audi B5 S4 K03 Turbo Rebuild

This Audi B5 S4 short shows a K03 turbocharger rebuild subject from the project. It's a quick look at the turbo components, not a substitute for the detailed balancing, assembly and inspection procedures needed for a turbocharger rebuild.

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What you’ll see in this one

If you're looking at the B5 S4's factory-style turbos, the K03 designation matters. Verify exactly which turbo variant you have before ordering parts.

A closer look at this job

This Audi B5 S4 Short focuses on a K03 turbocharger rebuild topic. B5 S4 owners may search for K03 turbo bearings, seals, turbine shaft play or the twin-turbo 2.7T engine, but the short clip does not prove that each part was replaced or that a finished rotating assembly was balanced. The page is a project reference for the K03 hardware. Proper turbo rebuilds require condition inspection and correct balancing and assembly specifications; consult a qualified turbocharger service procedure before repeating any work.