2001 C70, How Long Do The O2 Sensor Normally Last?

[auto3251]

I have smog coming up and i'm about around 110k miles. i have a check engine light since 100k, don't know what it is, haven't had it scanned yet, and was wondering if it's a o2 sensor that's overdue for a change.

How long do the o2 sensors normally last on these cars? and where's a cheap place to buy one.

also, what's the longest anyones ever gone on the original timing belt?

[Seka99]

You should run by Auto Zone or somewhere similar and have them pull the codes(s). More than likely it will be a code indicating one or both of your O2 sensors have a bad circuit. I would venture a guess from threads here on VS 100,000 is probably the median life span. Brace yourself, they are expensive. I wouldn't recommend anything other than OEM. Will put you back about $400. Try FCP they seem to be pretty reasonable. I had a CEL that first indicated the rear O2 sensor was bad. Changed it light came back and indicated that the front O2 sensor was now bad. Replaced it and the light came back on!!!!!

After running through the VS forums one member suggested that I depower the car for at least 20 minutes. I actually depowered it overnight, woke up, had some coffee, hooked up the battery and the light never came on again!

A friend who works in the parts dept at the local Volvo dealership said the maint techs there usually replace the O2 sensors in pairs FWIW....

Vance

[Seka99]

Oh yeah that timing belt. I believe 90,000 is recommended. Get it done the alternatives are not good!

Vance

[TheCapn]

Tbelt interval is 105,000 on the 2001 do yourself a favor and get it done, before the O2 sensors....

[MilesC70]

My 99 C70 has 208 000 KMs on it (approx 130 000 Miles) and most likely the 02 sensors are originals. (Bought the car at 200k).

In my experience with 02 sensors the CEL will come on and tell you they need to be changed, you'll buy new one's, you'll change 'em, you'll need to buy bandages 'cause you lost a knuckle or two in the process, then the CEL will still tell you you need new ones.

I must note that my 02 sensor experience was on a 95 Dodge Neon.

If you're going to change the 02 sensors maybe you chould do some exhaust work too. EST has cat back exhausts for our car on sale until the 15th plus you can get a discount on downpipes form several vendors by being a member of volvospeed.

[PyROTech]

Oh yeah that timing belt. I believe 90,000 is recommended. Get it done the alternatives are not good!

Vance

Tbelt interval is 105,000 on the 2001 do yourself a favor and get it done, before the O2 sensors....

ya, its not good when it goes, my experience.

[atefitty]

I have smog coming up and i'm about around 110k miles. i have a check engine light since 100k, don't know what it is, haven't had it scanned yet, and was wondering if it's a o2 sensor that's overdue for a change.

How long do the o2 sensors normally last on these cars? and where's a cheap place to buy one.

also, what's the longest anyones ever gone on the original timing belt?

Why are you speculating that its an o2 sensor when it could be anything related to emissions or even a transmission issue....Go get your codes read..

[mbsl98]

Just a couple of thoughts. Springs are not usually needed unless you want to change the ride. You really do need to think of "spring seats" with the struts as they are a wear item that is easily done when you do the struts. Also, you should never let a check engine light go for 10k without reading it. You can get it read for free, and it may be telling you something you need to know to avoid doing more damage by driving. The codes you get may be as simple as the vacuum elbow on the intake manifold that goes south all the time and triggers a code much like an O2 sensor (a 50 cent part). Also, the front O2 is much more important than the rear. The front actually impacts engine performance and mileage, and potentialy impacts the life of the cat just after it. The rear O2 is just a monitor to tell you if the exhause has cleaned up OK. It doesn't do anything else, and does not change engine performance. I usually change the front as preventive maintenance, and let the rear go as long as possible. Changing the front at 100k often improves responses and MPG even though it was not yet bad enough to trigger a CEL. These fail gradually over quite a long period, usually.