If your product is a complex component that is integrated into a product by the OEM, does the 'component' still need CE marking?

It depends on the type of component and the specifics of the OEM. Components are covered by the regulations provided they fall within the scope of the regulations. E.g. a resistor being a passive device and falling outside the scope of the regulations is NOT subject to CE marking. A dc-dc converter module is covered by the regulations and therefore CE marking applies. If the OEM is located outside of the EU then they may legally purchase components / modules from elsewhere outside the EU and CE marking does not apply. However, if the OEM then sells the final product into the EU they take overall responsibility for the complete product including the component / module. If the OEM is based within the EU it is illegal for component / module suppliers to sell them these items without CE marking PROVIDED that the regulations apply.

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