Thanks qtiger -

I found an article on the net about the issue:From:
http://www.artsautomotive.com/PartsRoom.htm
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Here's an example: let's say you have a Honda Civic. The parts manufacturer NGK made the spark plugs for you car, but not the spark plug wires. If you bought a spark plug for your Honda at the dealer, it would come in a Honda box with a NGK spark plug inside. That would be a Genuine part. If you bought NGK spark plug from a parts store, it would come in an NGK box with the exact same NGK spark plug inside. That would be an OE part. If you bought a set of NGK wires from a parts store, that would be an OEM part. However, if you had a Mazda Protege, NGK wires could be Genuine or OE.

Not everyone agrees on these definitions. Many mechanics will say that OE is synonymous with Genuine. Or OE and OEM mean the same thing. These are our definitions, based on definitions that our major suppliers use. Put forth in an effort to explain where the parts we use in your car come from
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