Table 1 shows two common air brake related problems of the 1999 Audi A4. The number one most common problem is related to the air brake antilock control unit/module (five problems). The second most common problem is related to the air brake abs warning light (one problem).
| Problem Category | Number of Problems |
|---|---|
| Air Brake Antilock Control Unit/module problems | |
| Air Brake Abs Warning Light problems |
Abs computer failured during hard braking. After searching car sites, it appears that the vw/Audi abs units regularly fail rendering the abs inopperable. Although the regular braking characteristics of the car are maintained, the abs no longer functions. Read details...
Abs module failed approx may 2004 at 65000 miles. Abs not functioning and warning light remained lit on dashboard display. Replaced part with used abs module from another Audi A4. Old (failed) part is available. Read details...