A camshaft position sensor helps the engine control unit (ECU) determine the precise amount of fuel the engine needs at any given moment. When this sensor begins to fail, it can cause all sorts of problems - poor fuel economy, rough idle, hesitation, and it can even leave you by the side of the road. Therefore, when it's time to replace the camshaft position sensor, it's critical to use a Genuine Honda replacement part.
OEM Honda parts have a lot of advantages over after-market parts, but this is particularly true of OEM sensors. Many after-market sensors are "one size fits all" devices that are simply re-packaged based on the application. While this makes after-market sensors cheap to manufacturer (and cheap to buy), it can cause havoc with engine timing. Best case, an after-market cam position sensor will be "off" a small percentage...this will waste a little fuel and reduce performance, but it will be a small amount. You might not even notice.
Of course, if the cam position sensor is off by even 1/2 of one percent, it will hurt your vehicle's gas mileage and reduce power. Considering that you can buy a genuine Honda replacement part for us for wholesale, and considering we ship parts fast, it only makes sense to buy an OEM replacement.