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eBay listing advertises that they are selling a NTK 24300 but the etching on the o2 sensor I received from them says 22641AA050 LZA06-AF1 NTK. It is a 5-wire. Googling those part numbers didn't result in anything conclusive. Tech support at NTK USA said that the correct replacement for an L1H1 is supposed to be an LZA09. The shipped to me is an LZA06. They have no data on LZA06’s since they are only sold in Japan but did say that there are big internal differences between each model (LZA06, LZA07, LZA08, etc.)