Proactively Replacing 02 sensors... Is it a waste of money?

[clarkerussell]

Hello all,

My 1996 has 115K miles and I don't think the O2 sensors have ever been changed. I have no indicators that they are defective, I was just thinking that they need to be replaced at about 100K miles. That being said, should they really be replaced proactively? Thanks in advance.

Clarke

[msvx95]

You are doing the right thing..your gas mileage should be a bit better too.
I don't normally do mine unless it throws a code. If you haven't done so, put some antiseize on the threads.

[B 4 You]

i need to get new ones on mine.

procrastination.

[Sean486]

Put new ones on mine proactively. Figured it could only help.

[Blacky]

I wait for a code. If they aren't working properly the CEL will let you know.

[Manarius]

If you're seeing no symptoms, I really see no reason to replace them. Now, if you were having bad mpg or other engine issues, then I could justify replacement. But, "just because it's old" isn't really a good reason to replace things on a car unless it's prompted by something else, or it's something that wears out with age (belts, gaskets, etc.)

[Bonestock]

If it aint broke, dont fix it. If it broke while you were fixing it, it needed fixin' anyway!

[Jake@FAPFab]

recover horsepower and drivability by switching to denso 02s.. $60 each at rockauto

[dcarrb]

I would proactively replace O2 sensors (or pretty much anything else) only if a failing O2 sensor could make me have to walk home.

dcb

[Freeman]

I just ordered a couple of those NGK's, John pointed out in another thread. Only about thirty dollars each.

[clarkerussell]

Are there 2 or 4 O2 sensors on the SVX?

[Jake@FAPFab]

3 wire 4 pin sensor

[1986nate]

Originally Posted by clarkerussell

Are there 2 or 4 O2 sensors on the SVX?

2 on OBDI(92-95) SVXi and 3 on OBDII(96,97) SVXi