O2 sensor lifespan

[Yukiwari]

Elantra MD 2.0Nu DOCH MPI

o2 sensor never replaced gas smell from exhaust in cold start recently, acceleration is seem sometimes good sometimes sluggish car pass HC 7PPM & CO 0% in my country they don't have nox I got only one o2 which is upstream one car mileage 223,000 suptorpical climate

Winter 35.1mpg with 424 miles range
summer 36.2mpg with 460 miles range

do o2 sensor need replacement asap or wait for full failure

 

[GR_CoB]

If there is no CEL trouble code, don't replace anything. Given your MPG - O2 sensor is still working great.
If it does fail - replace only with OEM, or OE supplier.

 

[Yukiwari]

No CEL Light, obd live data long fuel trim 0% avg and short trim float between 0 and -95 stay at -95 mostly voltage reading from 0.95 till 0.89 depends on driving conditions I know -95 is weird because engine performance not bad I don't know if this reading accurate or obd malfunction

 

[JohnnyJohnson]

The original in my old Toyota Corolla was still working after 16 plus years and over 150,000 miles.

 

[Lubener]

Elantra MD 2.0Nu DOCH MPI

o2 sensor never replaced gas smell from exhaust in cold start recently, acceleration is seem sometimes good sometimes sluggish car pass HC 7PPM & CO 0% in my country they don't have nox I got only one o2 which is upstream one car mileage 223,000 suptorpical climate

Winter 35.1mpg with 424 miles range
summer 36.2mpg with 460 miles range

do o2 sensor need replacement asap or wait for full failure

I don't see anything wrong with the figures you mention. The O2 sensor's signal is basically ignored by the computer on a cold engine (open loop operation). I would leave them alone.

 

[Yukiwari]

Thank you GR_CoB & JohnnyJohnson & Lubener

 

[Exhaustgases]

A 2000 year vehicle under 100k miles original O2 sensor.

 

[97prizm]

Elantra MD 2.0Nu DOCH MPI

o2 sensor never replaced gas smell from exhaust in cold start recently, acceleration is seem sometimes good sometimes sluggish car pass HC 7PPM & CO 0% in my country they don't have nox I got only one o2 which is upstream one car mileage 223,000 suptorpical climate

Winter 35.1mpg with 424 miles range
summer 36.2mpg with 460 miles range

do o2 sensor need replacement asap or wait for full failure

If you do replace the O2 sensor make sure it matches the original. There are the old style 2 wire, 4 wire, and heated O2 sensors.

 

[Yukiwari]

OEM part are renew not like the old one I'll check it out, I'll leave it till pre failure symptoms I drove the car mostly at highway 77mph weekly for 100mile

 

[Cujet]

I've replaced a number of O2 sensors on my high miles Ford trucks due to slow response. They were still functional, but every few months would generate a check engine light and OBD2 code. I did see a small increase in MPG when they were changed.

 

[Yukiwari]

I've replaced a number of O2 sensors on my high miles Ford trucks due to slow response. They were still functional, but every few months would generate a check engine light and OBD2 code. I did see a small increase in MPG when they were changed.

Great results, I think mine maybe slow lazy sometimes no maintenance schedule for this part but I'll check the new one match the old if so I'll replace it

 

[Chris142]

They start getting lazy about 80-100k. Replace them then.

 

[Kestas]

BMW actually publishes in their maintenance manual to replace O2 sensors at 100K.

 

[Yukiwari]

They start getting lazy about 80-100k. Replace them then.

Yes it lazy sometimes sluggish acceleration time to replace

 

[Yukiwari]

BMW actually publishes in their maintenance manual to replace O2 sensors at 100K.

Time to replace I am sure Korean Earlier 80k maybe