is it bad to go with NON-NISSAN o2 sensors?

where do u guys recommend me buying them?

how long will install take?

also isnt there different types i can buy? some with just the o2 sensor and some with the adapters too?

which ones should i buy?

 

3 o2 sensors.

www.oxygensensors.com

install shouldnt take more than say an hour jack up to jack down.

 

which brand should i buy? Bosch...Denso...or Walker?

 

Bosch is the OEM manufacturer for Nissan - so you can't go wrong with a replacement from Bosch.... Walker works equally well - and are cheaper... take your pick. I think Denso and Bosch cost the same (I'd go with Bosch in that case - since they are the OEM).... you can go with either the OEM connector or universal connectors and splice in your old connector...

 

does these o2 sensors plug right into my existing o2 sensor harnesses?

 

Yes if you get the ones that come with the plugs. The universal ones are not plug and play as they need to be soldered on to the old wires. I have the universal walkers as they are $20 cheaper.