It is a Denso 234-9011 and can be had for $95 on ebay, $118 on Amazon and $133 at Rock Auto.

Does everyone else agree that it's okay to go for that? I kinda took Cory's statement to heart that he sticks with Factory parts...plus that's always been my sentiment too.

Is that with the OEM Subaru connector on it? Because I remember not being able to get one for under $150.

I think the non-OEM sensors are fine. It's the crappy non-OEM do-it-yourself connectors they come with that are the problem.

There is a cross reference to Bosch, NGK, etc. but AFAIK the Denso is the OEM for the Subaru sensor.

From everything I just read, it is Plug & play.

ACDelco - 213-2843
Airtex - 5S4302
Bosch - 15537
Denso - 234-9011
NGK - 24659
Subaru - 22641AA042
Walker - 250-54004

Denso is an OEM supplier for many electronic parts for JDM manufacturers. I'd have no trouble putting one in my car.

Maybe my earlier statement is adding to the confusion, let me try to clear it up.

Most aftermarket sensors are fine to use, I would have no problem recommending Denso, Bosch, NGK, etc. Just make sure you get the one with an OE style connector on it. The ones to avoid are usually called "universal" and they come with no plug on the end. You are supposed to cut the stock plug off your original sensor and splice it on to the new one. Which is basically what Cody has done, except it's still the OEM sensor. These are usually less expensive, but like I said most mechanics that I know will not use them.

As Khail just mentioned, I think I was a bit confusing as well... It's not that the part is specifically the factory part, simply that I get the aftermarket one that has the factory connector, in order to avoid having to cut and splice wiring.

Thanks for clarifying guys. According to several posts on Nabisco, Denso makes the OEM sensor anyway, which isn't surprising since I've seen "Denso" printed on other sensors on the car.

Some even claim that Denso makes all of the aftermarket ones too (rebranded), since it's a unique-to-2L-WRX sensor and most manufacturers can't justify making the small qty that the small demand warrants.

The same CEL came back today so I ordered the sensor from Amazon. Hopefully it ships from Fernley and gets here in a day so.