Hi guys, need a little help with a rx330 I have code P0037 bank1 sensor2 I order from Amazon part Denso 234-4509 I search only have rx300 but can't find anything on the rx330. Popping the hood I only see 1 sensor. Can some please let me know where b1s2 is located or a how to? Thanks in advance for any input.

 

Sensor 2 is the O2 sensor after the cat attached to the exhaust manifold, Sensor 1 is the AF sensor after the exhaust manifold before the cat, and it is sensor 1 you see when opening the hood.

To see sensor 2, bank 1 (firewall side) look just after the cat that is attached to the exhaust manifold, and you will need to get under the car, and remove a belly pan (if RX330 like RX350) to see it maybe.

On the RX350 at least, it is low enough down (because engine sits angled to the firewall) to be out of the way of the firewall clutter, and should not be hard to replace.