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Re: O2 sensor draining battery?
I had a 95 Kia sportage in my shop that was draining the battery overnight. Found it had a parasitic drain caused by the 02 sensor. Turns out someone had changed one of the relays in the under hood fuse box. Both relays in this vehicle are what is called a dual output. Not a typical 5 pin relay so the parts store will always give u the wrong one. The correct part number is a bosch 0332019151
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