It is OEM, I'll return it and get another one.

I have a 2004 S60 with 80K on it. The idle was low and started idling rough, whether the engine was hot or cold. And the CEL light was on with a code of 2407. I took it to the Volvo mechanic. After 3 days, they said it needed new plugs and a mass air flow sensor. He said the engine throttle was fine...