A defect in products is something that cannot be avoided and, usually, occur during the production process. A defect in a product means that the product cannot fulfill its function requirement. Once it occurs the quality of product will be downgraded and it will also affect the company. The company needs to rework or reproduce the product again to fulfill the customer requirement. This paper presents product defects analysis using failure mode effects and criticality analysis (FMECA). A case study in automotive parts manufacturing industry is presented. The objective of FMECA in this case study is to analyze and identify the product defects characteristics based on product reject data received from the inspection line of the industry. The failure effects, causes and criticalities are explored and offer the basis for improvement to undertake.