This GERMBAN oxygen sensor is a direct replacement for your 2008-2014 Subaru Impreza WRX or STI with the 2.5L H4 turbocharged EJ257 engine. It's the upstream sensor, also known as the front or pre-cat sensor, and it's heated for faster switching and more accurate readings. The OE part number is 22641-AA510, and this sensor crosses to a ton of other numbers like 2349034, 18093, and 250-54079, so you can be sure it's the right fit. It comes with a 4-wire harness that's about 31 inches long and features both blade and bullet terminals. Installation is easy and direct—just plug it in and go. GERMBAN gives you a 3-year warranty with this sensor. If your Impreza is throwing a code or running rough, this O2 sensor is a solid, affordable fix to get it back in tune.
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