Hello there.
I have an f20 b and only recently replaced my 02 sensor.
It was the exact same as the h22 sensor,same plug everything. It was a blue print and I have the part number if you want to cross reference it.
How's my wires has your sensor got?
Yea mine has 4 aswell and is in front of the cat underneath the car.
It fixed my hesitation issue I've had for a while and my fuel economy has shot up.
I can't find the sensor at the moment, but Il get a part number anyway.
If your looking for a sensor that's works properly and dosent have the Honda price tag blueprint is the way to go. I can't fault it at all and I've scoped it on my scanner.