Multiple misfires 1,2and 3

[Gelbster]

Unless the other O2 sensors have been replaced ,it is prudent to replace all at the same time.
Make sure you get the correct part number - your Boxster uses different O2 Sensor to later M96.The Pelican Parts Catalog is correct.
While you are in there, check the coils for cracks(Search), oil in the spark plug tubes, old plugs and vacuum leaks.All potential/likely sources of misfire codes.

[Walshie]

Originally Posted by Gelbster

Unless the other O2 sensors have been replaced ,it is prudent to replace all at the same time.
Make sure you get the correct part number - your Boxster uses different O2 Sensor to later M96.The Pelican Parts Catalog is correct.
While you are in there, check the coils for cracks(Search), oil in the spark plug tubes, old plugs and vacuum leaks.All potential/likely sources of misfire codes.

Thank you. I will check everything.

[mikefocke]

Originally Posted by Gelbster

Unless the other O2 sensors have been replaced ,it is prudent to replace all at the same time.

I first got a Lazy Sensor code on the front right sensor and replaced it. Maybe a year and 6k later and just for symmetry, I replaced the front left. 30k later and 5 years the original rear sensors are still there with no codes or issue.

So why should they all be replaced at once? Is this replacing 3 sensors that aren't throwing codes the smartest $375 you should spend maintaining a Boxster?

[Walshie]

Originally Posted by mikefocke

I first got a Lazy Sensor code on the front right sensor and replaced it. Maybe a year and 6k later and just for symmetry, I replaced the front left. 30k later and 5 years the original rear sensors are still there with no codes or issue.

So why should they all be replaced at once? Is this replacing 3 sensors that aren't throwing codes the smartest $375 you should spend maintaining a Boxster?

Hi, yes I agree. In the UK we only have 1 sensor for each bank so it's not too bad for piece of mind.