There are 1 owner-reported lighting complaints for the 2010 Audi S4in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
CONDENSATION BUILD-UP IN HEADLIGHT HOUSING ON VARIOUS AUDI VEHICLES THAT DOES NOT DISSIPATE REGARDLESS OF WEATHER OR DURATION OF HID LIGHTS BEING ON. *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026