P0325 popped up. Tried to wiggle the connector on the knock sensor and cleared the code but it came right back.
I have two question, hope someone can advice.
1. Is this common failure? Anything I can diagnose before ordering a new sensor?
2. I see that there are few options as replacement parts. OEM goes ~$135-~$150 from amazon or eBay, but I see there are identical replacement OE parts that got for less than $20. Any advice/experience with those cheaper options?

 

It's relatively common they're very fragile like my feelings. Only use OEM, stay away from Ballade. It's worth the OEM money, once the sensor is in it will likely last a good 10 years. They go bad whenever someone replaces the starter or clutch, usually. However they are quite fragile so perhaps time and heat cycles can make the fragile sensor more brittle, if that's possible.

Soviet made a great DIY. You need a 24mm deep socket, a u joint extension and a slim head ratchet, or a 3/8ths with a cheater bar. Sucker is on tight. When tightening screw in by hand first then finish off with the wrench. It's easier to put in than take the old one out. Remember it's very fragile so be careful to not put any stress on the green plastic.

Alternately using a long 24mm swivel head wrench works pretty good to remove it since it's already broken it doesn't matter what happens upon removal. There is 1 electrical connector.

 

Yeah, I have seen the video and the thread here. Very well done. Thanks for the feedback.