The location of the Bank 1 catalytic converter depends on the engine configuration of your vehicle. In most cases, Bank 1 refers to the side of the engine where cylinder number 1 is located. In a typical inline-four or V6 engine, Bank 1 is usually on the same side as the cylinder 1. However, it's important to note that the specific placement can vary among different vehicle makes and models. To determine the exact location of the Bank 1 catalytic converter in your vehicle, it is advisable to consult the manufacturer's documentation or seek assistance from a qualified mechanic.