Depends on the car. If it is a newer car, with ECUs that need factory software to diagnose and repair, then Velocity is probably your only good choice. Aron is great (and just gave a tech day session for FCA Hawaii). If you have an older car, Larry Thompson of Thompson Automotive at 1149 Beretania may be able to help you. Check with him. And a few talented folks will pick up their own wrenches!