Hi guys, my Stream developed a broken Primary O2 sensor issue which boils down to having a need to replace it. I found and NGK item that doesn't hurt the pocket so much however... It states that is only applicable to the 1.7 litre engine. Now as I have the K20 I was wondering if they are interchangeable between the two? From the pictures the plug and wiring looks the same, but since I am not an expert I rather ask than waste money. Cheers for any help!