What's the difference between 部件, 零件, and 配件？ What's the difference between 部件, 零件, and 配件？

I'm trying to translate the English sentence "Manage parts &amp; accessories retail operations" and am having difficulty finding the right words for "parts" and "accessories". 

Also, not sure if I should throw in 辅助品 for "accessories" rather than one of the above options.

FYI, this translation is for a vehicle manufacturer.
零件 (parts) and 配件 (accessory) would suffice, in Traditional Chinese.