O2 Sensor Parts....

So, what is the bestest brand of 02 sensors for 1st gens...After checking the OHMS on my pass side rear 02 sensor, it is bad. Need a replacement, and there is Denso, Bosch, NTK. Which works best on the Tundras?

 

On my old '03 I replaced 2 with Denso's worked great.

 

Denso. They are the OEM toyota brand, without the toyota branded sticker, or price.

It will be costly, but might be wise to replace all 4 while under the truck. What year is your truck?

 

For 2002 4.7L 4WD

Front and rear o2. These were about $47 each. I’d recco you do all 4 if you can swing it. Made my truck run a little nicer (torque) and my MPG go up about 1mpg in city. Highway remains the same.

Confirm your fitment on Denso site. Buy where ever from Denso distributor. Stealers are not the place to buy these at $160ish each.

 

OP: notice PHM has the thread chase too - its a really "nice to have" tool and worth the price paid!

 

Yes it is!

 

‘03 4.7. Already bought 4 AC Delco at Autozone...lol...just kidding....
Will go with Denso. Finally got around to testing the bad one per PHMs advice/post and it was not working. I know NTK is NGK...got one for our Odyssey a while back.
Thanks for all the advice. Will certainly check the Denso website for proper part numbers.

 

What exactly does this tool do? Cleans out the threads before you thread the new sensor in?

 

Yes. Apply grease to it first so any shavings/gunk sticks to the tool.

Old shade tree mechanic tip: You can make one with a grinder, Demel, or file by grinding/filing 3 or 4 grooves in the threads of the old O2 sensor. Then keep that one in your tool box for next time. It works for bolt, spark plug, etc.. The same principle applies, only in reverse, to any nut.

 

Yes. I read about this one on the Big Gurrl Denso Reviews where a commenter suggested it. Lisle is an American Company and the part is quality for $7. You can feel and hear the crunchies getting trapped and obviously see them in the above pic. The new o2 threads on nicely. Prevents trashing the new sensor and gives a tight exhaust seal. Buy one of those o2 Sockets, too.

 

294500 and first light came on
O2 sensor bay 2
'02 4.7 2WD
same deal, do all if I can?
significant tackle for a newb?

 

The rears are easy access, but the nuts are probably seized. You’ll need some hand skills technique in removal. The front are harder due to the connectors removal being difficult to access. You’ll need a Gorilla Arm Technique for those.

I’d change them all if you are unsure the age. I did all mine as the fronts were newer Bosch (6years?) and the rears looked crusty (age?). They were all out of Ohms Spec.

It was a 6 hour total job for me, but I took my time and made sure I cleaned everything up really well. I’d buy 4 new nuts for the rear posts in addition to the new sensors. The Denso fronts come with the Copper Anti-Seize.

 

Hardest part of removing the passenger rear is getting it unplugged, especially since it is mounted with another wiring harness.

 

Wait until you have to do the fronts. They are really difficult especially the pass side one.

 

This is one of those jobs(like many) that is probably a lot easier if the truck is up on a lift and you're not having to lay on your back. I imagine the guys at the dealership can have one unplugged in a few minutes.

 

What, no in-depth write up from PHM? Lol. Greatly thankful for your knowledge and used your write up to check if the sensor was bad or not. Right now, the $50 for the Denso was enough of a hit to the wallet for now....lol...

 

Good on ya. That Big Gurrl Denso store is key to good prices. Brand New Toyota wants $150! even through their Programme.

 

Well, installed the sensor today after church....cleared the code, and it has stayed off. Thanks again for your knowledge PHM and the other members of this forum.