Parts Grading A standard code system is used to communicate the condition and quality of a part between automotive recyclers, automotive repair shops, and insurers. A Grade - The highest quality part. It is of low miles and/or exceptional condition for its age.B Grade - The second level quality part. It is of average miles and normal condition for its age. C Grade - The third level quality part. It has high miles and/or light damage. No Grade - A part that has not yet been graded. Please message us with questions. Template Design & Developed By. Design & Developed By : eFusionWorld.