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Knock Sensor upgrade, OEM vs. aftermarket

ndsnewleg
in 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX

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What's the skinny on OEM knock sensor vs. Bosch or Wells, etc. I can get a Bosch online for $40 plus $5.50 shipping. Dealers' is $70 plus tax. Wells is $38 from Autozone. $30 bucks saved buys a great bottle of Scotch and "tis the season" after all. I have a 90 Legacy, MT wagon, 170K.

I purchased a direct fit O2 sensor from a guy on ebay and I haven't had a single problem with it. I paid $60.00 plus $5.00 shipping. As long as it is a plug and play module I would buy the bosch online.

Got a Bosch online a couple of years ago from thepartsbin.com. $40. No issues.

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