4play4dr

Does it matter? Will autozone/o'reilly brands suffice? What brands to stay away from? Needa replace for smog

tmf2004

iTrader: (15)

I heard Bosch are good but u could always stay with Denso

http://www.rockauto.com/catalog/more...225&cc=1356072

nezlyfe

I've used the universal Denso and cut the old connector and it worked fine and cheaper than oem fit.

newgsman

iTrader: (4)

For the post cat O2 sensor I put in a generic aftermarket about 800 miles ago and so far it is working fine. GS400. I was getting code P0161. Paid just under $40. Even passed my emissions test a couple of days ago.

steventrrr

seeing as to how you are in CA, where emissions is a pain in the ***, I would stick with Denso. if it is your post cat o2 sensor(s), make sure it's not your cat before you buy some o2 sensors. On my old car the cat was going out and it would throw codes for the o2 sensor.

Hollywoood

iTrader: (9)

^^^^^^ good info.. Gotta change mine

SaiyanGS3

iTrader: (8)

I've used both Bosch and generic aftermarket in my old Q45 and both of the worked. I haven't had the need to replace any in my GS yet, but when I do I will purchase something from Rock Auto. Honestly I would probably search and see what who made our OEM sensors and buy the same brand.

GS4_Fiend

iTrader: (22)

Bosch and Denso are OEM replacement. But I would stick with Denso.

AZTurbo

iTrader: (10)

I used the NGK units that have the correct harness, not universal. I have not had an issue with them.

4play4dr

For the universal ones..u guys just spliced the harness onto the old one?

Ursus

I used the cheapest from rock auto AWPI or something like that. Direct fit came with connector ( no splicing ) and even had anti seize on the thread.

SaiyanGS3

iTrader: (8)

Good info to know.

GS4_Fiend

iTrader: (22)

why in the world would you want to splice? buy it from denso, it's plug and play bro.

steventrrr

^agreed. should never splice into factory wiring unless you need to.

4play4dr

I was thinkin the same..some ppl were saying cut the old connector off? But ima go with plug n play for sure! Thanks fellas