2004 Hyundai Sonata Q&A

2004 Hyundai Sonata Question: which is the bank 1 for the O2 sensor?

Answer 1
Bank one is on the head with number one cylinder. -
Comment 1
On my car- there are two sensors and both are on the manifold. One is on the top of the manifold, the other is on the bottom of the manifold. Which is bank 1 sensor- since I only have one exhaust. -
Answer 2
4cyl. Sonata? Front is B1 S1 , rear is B1 S2 . -