O2 sensor (what to buy?) (2 Viewers)

[Rifleman]

If it is indeed the sensors, I would be surprised that they only lasted 10 yrs.

Just as an FYI O2 sensors are a wear item, and need to be replaced as part of a regularly scheduled maintenance plan
In the case of the old single wire unheated O2 sensors from the late 80's early 90's they were supposed to be replaced every 30 thousand miles,
Newer heated 4 wire O2 Sensors should be replaced at, or around every 60 thousand miles, for best fuel mileage and overall engine performance

 

[jaymar]

I asked machine shop about sensors in general, with the aim of going another 200,000 miles minimum with this rebuild. They said replace the sensors.

 

[Rifleman]

I asked machine shop about sensors in general, with the aim of going another 200,000 miles minimum with this rebuild. They said replace the sensors.

When i ran my own shop i had customers who said they couldn't afford the cost of new sensors so they would ask us if there was anything else we could do,

We didn't like doing this, but we would remove the old O2 sensor, and clean all the caked on crap out of the holes in the tip of the sensor,

Then we would reinstall the sensor and let the customer know that this "quick fix" bought them a few extra miles of use, but they still needed to buy new sensors

 

[fjbj40]

I just replaced O2 sensors in my 2010 4Runner.

Had ck engine light and P0420 and another that was cat below efficiency threshold. Put in new OEM sensors, erased light. Problem went away and fuel mileage improved dramatically.

230,000km on factory sensors. At the cost of fuel and improved operation it’s well worth it!

 

[mudgudgeon]

1995-1997:

89465-69085
89465-69105

These will come with gaskets but will not come with any hardware. 90179-08059 x4 will net you the lock nuts for the studs. If you need new studs and can get the old ones off, 90116-08211 will work perfectly.

@OGBeno These studs 90116-08211 look to be discontinued.

Is this a suitable substitute 90116-08112
(waterpump/fan hub studs)

I'm sure the numbers give designation for studs specifics?? Thread size and length?

 

[jaymar]

@OGBeno These studs 90116-08211 look to be discontinued.

Is this a suitable substitute 90116-08112
(waterpump/fan hub studs)

I'm sure the numbers give designation for studs specifics?? Thread size and length?

@OGBeno bump.

 

[mudgudgeon]

@OGBeno bump.

In the process of ordering these along with a bunch of other stuff.
Will be able to confirm if these work in a week or so

 

[OGBeno]

90116-08348

 

[COS80]

I've read a bunch of posts but i can't quite determine what's the current wisdom on the discontinued 89465-69105... is it to use the Denso Part # 234-4153?

 

[BTLSHP]

FWIW, I just purchased these from Japan4x4 after discovering the "NTK" I had purchased via Amazon was not a legit NTK sensor.

They are for a 1994 FJ80 and I could not find comfortable sources online at other than enchanted prices.

 

[COS80]

View attachment 3794566
FWIW, I just purchased these from Japan4x4 after discovering the "NTK" I had purchased via Amazon was not a legit NTK sensor.

I'm working with them presently, too. He suggested that p/n, but said that it's not listed for the 97 US model. What year is yours?

 

[BTLSHP]

I'm working with them presently, too. He suggested that p/n, but said that it's not listed for the 97 US model. What year is yours?

Sorry, added the 1994 later. As I understand things, with respect to the upstream O2 sensor the difference is the style of connector.

That said, I thought the 95+ models still had legit Denso and NTK units available. My ordeal began when a stupid me bought an "NTK" from Amazon at the beginning of my rehab project. It failed in three months.....

 

[COS80]

Sorry, added the 1994 later. As I understand things, with respect to the upstream O2 sensor the difference is the style of connector.

That said, I thought the 95+ models still had legit Denso and NTK units available. My ordeal began when a stupid me bought an "NTK" from Amazon at the beginning of my rehab project. It failed in three months.....

The Denso p/n I referenced above is available... I was just hoping for some advice before I jump on one and then find out there was a better alternative all along, if I'd just known where to look for the answer (which seems to happen to me a lot).

 

[COS80]

Screw it, I'm ordering Densos.

 

[Malleus]

The only difference between the 1993-1994 sensors and the 1995'197 sensors is the connector. And the vendor Toyota bought them from.

 

[BTLSHP]

The only difference between the 1993-1994 sensors and the 1995'197 sensors is the connector. And the vendor Toyota bought them from.

The Amazon “NTK” sensor I bought was not going to be repined. Looks like the wires were sealed in with potting compound of some sort.

 

[Malleus]

The Amazon “NTK” sensor I bought was not going to be repined. Looks like the wires were sealed in with potting compound of some sort.

You can't repin the sensor, you have to change the connector housing on the harness end to match. This is only for the 2nd generation 80 (1993-1994); the 3rd generation 80 sensor is still available.

 

[BTLSHP]

You can't repin the sensor, you have to change the connector housing on the harness end to match. This is only for the 2nd generation 80 (1993-1994); the 3rd generation 80 sensor is still available.

Ok, at this point I am waiting for two new sensors ordered from Japan4x4, then I will deal with what emerges. For now, I found one of the Bosch generics on sale for $23 at RockAuto and the car runs well. That will then become part of her pile of spare bits going forward.

 

[COS80]

This is off to a terrible start... attempting to remove the very first nut resulted in a broken stud. Now what?

 

[BTLSHP]

This is off to a terrible start... attempting to remove the very first nut resulted in a broken stud. Now what?

Sounds like the down pipe has to come off—at least on a 94 and older 80 Series. If there is a stub you can get small vice grips on, you may have other options using acetone/atf, heat and perhaps something like phosphoric acid?