Started a tune for my car but the primary o2 sensor is reading way too rich, so I am going to replace it. Question is are these aftermarket ones any good? Seem to have seen different opinions. Any one had one recently? Something like this clicky.

I'm going to get an OEM one priced by Si but thinking its going to hurt...

 

I tried a cheapo one when mine went, ended up replacing it with a Bosch and it's been fine ever since. Think it was about £60 a few years back.

 

We have genuine Honda ones in stock

 

Normally an 02 sensor will fail lean, ie low voltage... seems odd that it's high.

What the ECU normally does is interpret the low voltage as a lean condition, and then richens the mixture. Hence why a failed 02 sensor gives you poor MPG.

I'd check it's not genuinely rich and the 02 is reading correctly.

 

I'm using a Bosch sensor all connected to AEM gauge. But I would think a OEM job is probably the best for a normal road car. Lets face it they don't normally fail as far as I know.

IME they do fail lean but at that point you really want to look into the lean factor? It's not norm and not good for engine running lean (or rich) but u get the ..

 

They all fail, they are a consumable part that wears out after 5yrs or so of "normal" driving.

 

There you go Richmc has lots of experience of cooking his sensors. I new there was someone out there who loves to cook

 

Read this amasingly accurate Wiki - http://en.wikipedia.org/wiki/Oxygen_sensor

Especialy the part "sensor failiures" you will find yourself educated, my old CRX had two lambda sensors in its life time they lasted the average 50K each so yes they are a consumable item and are "cooked" in so much as te platinum coating wears out.

Yes I do like to cook - Indian, chineese, thai, indonesian Sushi etc.

EDIT you may also see why Bosch are good at making the sensors.

 

A quick google suggests that is a Walker part number (250-24391) I thought that these were pretty well regarded out there ?

 

There's quite a few threads already on the right ones to buy. Have a trawl through the search