Location of post-cat O2 sensor connectors

[82bmw633]

I have a 1998 M3 (new to me). I am going to replace the post-cat O2 sensors (I have a code). I cannot find a reference for the location of the connectors for the post-cat sensors.

I replaced pre-cat sensors on my former E39 (M52TU) and the M3 connectors for the pre-cat sensors appear to be in the same location as the E39.

Are they under the engine cover with the pre-cat connectors?

Thanks!

[kjl512]

I have a 1998 M3 (new to me). I am going to replace the post-cat O2 sensors (I have a code). I cannot find a reference for the location of the connectors for the post-cat sensors.

I replaced pre-cat sensors on my former E39 (M52TU) and the M3 connectors for the pre-cat sensors appear to be in the same location as the E39.

Are they under the engine cover with the pre-cat connectors?

Thanks!

I have a 1997 M3 and the post-cat O2 sensors are under the car near the actual sensors. If you follow the wires you will see them. Very easy to get to.

[82bmw633]

I have a 1997 M3 and the post-cat O2 sensors are under the car near the actual sensors. If you follow the wires you will see them. Very easy to get to.

Thank you!

[tjm3]

Should be under a plastic cover alongside the fuel/evap piping almost directly under the driver's seat.

[82bmw633]

Should be under a plastic cover alongside the fuel/evap piping almost directly under the driver's seat.

I need to replace the fuel filter as well. Economies of scale. Thanks!