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I was wondering if anyone has used the Ultrapower O2 sensors that Rockauto sells? They are half the price of a Bosch. Are they worth it or are they junk?

well the bosch are garbage so i definitely wouldnt recommend a noname brand. denso is the oem. either buy denso oems or denso universals. i have had alot of bad luck with o2 sensors. from now on i would only ever buy oem. i was also able to get them from amazon.com slightly cheaper then rockauto so have a look there aswell. http://www.densoaftermarket.com/catalog ... ?part=o2sn

part numbers
Front
234-4143 oem
234-4209 universal
Rear
234-4606 oem
234-4209 universal

fyi ive tried no name ebay sensors (4), bosch (3) universal style and ngk (2) oem style and had codes with most of them. denso universals worked right away and havnt given me problems since.

Confirming the universal Denso O2 sensors work great. A minor advantage for me was the rear connector was very difficult to reach so I just spliced from under the car.

Thanks guys that was exactly what I was looking for. Didn't want to waste money.

Try ebay. I bought both of mine for ~$100 (Denso)