which sensor to buy?

Question

Its hard to determine the part number of the B1S2 sensor for my  corolla xrs 2009. Any suggestions?

Answer 1

Hi there,

Because it's a 4 cylinder engine, you only have a bank 1. It is sensor 2, this will either be called the downstream O2 sensor, the rear O2 sensor or sensor 2. Without knowing which engine is in it, I can't tell you the part #