Since 1988, Quality Diagnostics has taken a data-driven approach to auto repair. We service all makes and models, delivering a complete scope of repairs and maintenance. Call (610) 534-8863 today and schedule an appointment. Put your car in our capable hands! Since 1988, Quality Diagnostics has taken a data-driven approach to auto repair. We service all makes and models, delivering a complete scope of repairs and maintenance. Call (610) 534-8863 today and schedule an appointment. Put your car in our capable hands!