1995 KIA SPORTAGE
Problem: Catalytic converters are deteriorating ahead of schedule, allowing higher than acceptable emissions.
Fix: Replace the catalytic converter.
2000 AUDI TT COUPE
Problem: Cars reportedl y are unstable when driven at high speeds.
Fix: Install a control arm with stronger shock absorbers along with a rear spoiler. On all-wheel-drive models, replace front and rear stabilizers.