Kwiksen Oxygen O2 Sensor 234-4623 234-4732 Downstream

These sensors seem to only last me a few months on my 2007 Impreza 2.5i. I have unequal length headers mated to a stock cat pipe from a 2008 outback. This last sensor only lasted about a month before breaking and throwing the same codes again. Seems that sustained highway driving does them in. They are very affordable so it's easy to try to justify buying these, but for next time, I'll be buying an OEM sensor.

Just popped this into my '06 SAAB 9-2x (downstream), no check engine light, no "pending faults", took it on a 100 mile drive just to be sure. Seems to have worked just fine, and it was completely plug-n-play. If this thing lasts a year, I'll be happy. For $25 this was a high value purchase. The box it came in is different (white non-descript box, but who cares?). Came with anti-seize pre-applied to the threads. Beautiful. Thanks China! Better get your act together, Bosch.Update: 10,000 miles later and this is still doing the trick.

Did not work for my 2008 Subaru Outback. After a couple days the check engine light came back on, the car was running very rough, and I had to order another brand. This oxygen sensor is missing the large flat washer-like piece that my make and model needs. I went with a Denso sensor instead and it worked really well.

I initially made a negative review for this product for a check engine light I got after install but found another part caused it, so my apologies, this worked fine in my 2005 Forester X

Had a DTC for Bank1 Sensor 2 (post cat. (catalytic converter sensor B1S2) AKA downstream sensor. Replaced with this sensor perfect fit, great price and great performance so far. Definitely recommend it !!!

bad quality

Thought the product was good it lasted 2 months now I have to buy another one preferably from advanced because it at least comes with a warranty if I need it replaced

Install in Saaburu 92x. No problem with install, 300 miles, no more check engine light.