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Historically, accelerated cyclic corrosion test protocols utilized by original equipment manufacturers (OEMs) have been developed based on a great knowledge and abundant vehicle field data of primarily steel-containing vehicle components. Laboratory-accelerated cyclic corrosion tests with repeated cycles of wet, dry, humid, and/or corrosive media application have been developed both separately and in partnerships, such as in the case of SAE J2334, to simulate a severe corrosive field environment for evaluation of cosmetic corrosion performance of painted steel. With the interest in lightweight metals such as aluminum alloys and magnesium alloys in automotive applications, the validity and confidence of these accelerated test protocols with vehicle field data of lightweight metals is valuable to further increasing the usage of these metals.