02 sensor replacement - Toyota Nation Forum : Toyota Car and Truck Forums

vanhorne · 12-31-2011, 04:51 PM

My 2001 corolla has 200,000 KM on it (125K miles) and I am thinking about changing the upstream 02 sensor. There is no check engine light on, but I know these things wear out gradually. The dealer (Canada) wants $400 for just the part. The local parts store can get me an NGK for about $180. Sparkplugs.com has an OEM Denso for about $75!!

Anyone have any experience changing this sensor on a Corolla? I've done 02 sensors on other vehicles and found it makes a big improvement. Why the big price difference?

TrueMrP · 01-03-2012, 07:37 PM

I got mine on e-bay for about $70 CAD. I had no problems replacing it. The two nuts holding it were very worn so I had to replace them. I think it runs a little better but it could be the placebo effect. I'm waiting for the first fuel tank to finish so I can see any improvement in fuel mileage.