C4inLA

Curious as to history of mileage vs vehicle age and reasons peeps changed their exhaust O2 sensors.... I am still running on original ....

My history

94 C4 - 44k clock

Earlydays

Original on my '90 C2...it has 101,000 miles.

ThomasC2

Mine is probably original at 180.000 km. But I have a new on the shelf for this season just because. No problems with the one I have.

Thomas

justin-in-athens

Replaced due to non op at 165k miles. The car had been fitted with a test pipe at some point, so the heat shield was not there to protect it from direct engine heat--I imagine this is what killed it.

wachen

Based on the service records that came with the car, the O2 sensor was replaced at ~75k miles.
The car is at 123K miles now.

C4inLA

Interesting and quite good news on both parameters...

C24FUN

Original on my 90 C2 with 115k miles.

elbeee964

Changed, for '93 change's sake in '10, at 118k miles.

(Fuel injectors were sent out for refurb, spark plug lines and pressure sensor o-ring being replaced -- you get the idea.)

The old one was still working fine (no mpg bump noted), so it was relegated to a garage shelf.

ras62

Replaced at 95k miles due to hunting at idle and intermittent hesitation at low revs. These things have some peculiar failure modes.

Vandit

Replaced mine a year or two ago at around 100k miles during a major-ish service including plugs, wires, caps, rotors, coils, cylinder head temp sensor, injectors serviced, new rubber bits, etc.

I was trying to solve an intermittent hesitation that progressed to an undriveable car. It went away. Luckily.

Mixter

Original O2 sensor.... 90 C4 - 62k miles.

boxsey911

Changed mine as a precaution at 150,000 miles. Nothing to really say it needed it but I thought it deserved one!

Turbohead

if it ain't broke .............you know!
Elliot

onceover

Changed at 90k because it was stuck in my cat when I put a cat delete in.

964Lovac

same here around 88k or so...