The automobile has evolved into a complex multimaterials stem that is exposed to a highly aggressive and wide range of environments. Its design includes auto-body and structural materials; hardware such as trim, bumpers, and brackets; engine; drive train and exhaust systems; electrical and electronic systems and systems incorporating liquid passages and reservoirs such as heat exchangers; hydraulic brake lines, fuel lines and tanks; and oil and transmission fluid reservoirs. corrosion in the automotive electronics industry has become a significant factor in recent years because of the extremely complex systems that have been developed and the increasing demand on their reliability. Technological advances have resulted in the development of sophisticated components with closer spacing so that extremely low levels of corrosive contaminants can cause failure. Testing for this type of behavior is difficult and costly. Further advances in electronics can only be made where corrosion issues are addressed and reliability is maintained. Many publications have appeared in the technical literature on the subject of corrosion in electronics with more and more emphasis on testing.