Replace O2 sensors, reboot before or after?

[e34musician]

I just received my parts today from Bavarian. It takes 7 days because I'm in CA. It was shipped from the east coast.

Anyway, I got 1221 code. I will replace both O2 sensors. Should reboot before or after replacing the sensors. Thanks for the help.

Pete

[Blitzkrieg Bob]

while you replace the sensors, and the car will forget the old data and begin to relearn the data from the new sensors as you drive..

[Martin in Bellevue]

BMA will overnight stuff to ya with CA Overnight. That shipper is great within the state, & cheap; not so great to WA.

[Dave M]

BMA will overnight stuff to ya with CA Overnight. That shipper is great within the state, & cheap; not so great to WA.

May not be the quickest to Canada either, but its almost all I use. Just spoke to Patrick today, and Yves last week

Dave M