Audi S4 service brakes, hydraulic problems by year
44 NHTSA owner complaints name the service brakes, hydraulic across 5 S4 model years. The most reported year is 2000 with 31 reports.
| Year | Service Brakes, Hydraulic reports | Share | Median mileage | |
|---|---|---|---|---|
| 2005 S4 | 1 | 2% | — | |
| 2004 S4 | 1 | 3% | — | |
| 2002 S4 | 9 | 41% | — | |
| 2001 S4 | 2 | 2% | — | |
| 2000 S4 | 31 | 22% | 64,220 mi |
Share is the fraction of that year’s complaints naming the service brakes, hydraulic. Raw counts are not adjusted for sales volume — years that sold more units naturally accumulate more reports.