This bulletin applies to 2020-2022 Audi A4 allroad, A4, S4, A5 Cabriolet, A5, A5 Sportback, S5 Cabriolet, S5 and S5 Sportback; and 2021-2022 RS 5 and RS 5 Sportback.
Clean the area and check whether there is moisture underneath the protective sleeve. If there is no moisture in this area, re-assess the complaint and continue evaluating the rest of the brake system. The photo here shows a dry state.
This bulletin applies to 2020-2022 Audi A4 allroad, A4, S4, A5 Cabriolet, A5, A5 Sportback, S5 Cabriolet, S5 and S5 Sportback; and 2021-2022 RS 5 and RS 5 Sportback.
Traces of moisture/contamination and/or a warning lamp indicating a leak in the brake system may be encountered. Evidence of moisture may be seen on or or both of the rear brake calipers.
Assembly fluid was used in the supplier’s production process. The moisture that is visible does not necessarily indicate that there is a leak at one or both rear calipers. This may simply be residue from assembly fluid.
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety ofspecialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.
