BMW Repair: O2 Senser, o2 senser, 318ti

Question
I have a 98 318Ti, The check engine light came on with a P0130 (O2 Senser, Bank 1 Senser 1) code. Is this the pre or post cat senser?

Answer
Don, should be the Precat sensor. Post cat sensor should be Bank1, sensor Two. Give me the last seven digits of the VIN and I'll know for sure. Or you could disconnect the Post cat sensor, cycle the key and rescan the car with the scanner and see what the scanner calls the post cat sensor. If this helps please fill out a follow up survey.
-Evan