O2 sensors
#3
#4
#8
Bosch was what they came with off the factory floor. I've used them as I can get them locally. I've yet to have a dead one out of the box. I always reset my adaptive settings and they've performed fine. Nothing wrong with NTK as I think they came stock on D1's. I've heard good stuff on Walker units as well.
#9
#10
I bought both walker downstreams from ROCKAUTO.com for like $78 us shipped....they work perfectly...