One problem related to steering has been reported for the 1998 Audi A4. The most recently reported issues are listed below.
Control arm on my 1998 Audi A4 fractured when pulling out of a parking lot, causing complete loss of steering control. Audi technical service bulletin NHTSA # 10016418, #11242004 component description: 22. Suspension:front:control arm:lower arm bulletin number: 11242004 bulletin date: Nov 2004 vehicle: 1,998 Audi A4 summary: service action je campaign-check/replace front suspension lower control arms. Audi has found that in rare cases, one or both front suspension lower control arms on affected vehicles can exhibit wear, even though the damage to the rubber bo ( NHTSA item number - 10016418 ).