Question about EPA/emissions warranty and O2 sensor on 00 ML320
 

Recently our 00 ML320 check engine light came on so we took it to Autozone to have the codes read. The computer said that there was a fault at both O2 sensors on bank 1 side (pre and post cat). The truck has 71k miles on it and after reading the 8 yr / 80K EPA warranty I'm wondering if the replacement of the O2 sensors should/will be covered by the warranty?

TIA

The covered 8/80k items are listed in the warranty manual. That list shouild include the catalyst/intake manifold/exhaust manifolds/ & fuel ECU. SENSORS aren't covered!

O2 sensors are on the list, i checked on my way to work this morning. I was just wondering if it will be covered even if our state doesn't do emissions testing. I don't know whether the bad sensors would cause it to fail emssions testing or anything like that. We have noticed a decrease in fuel economy lately.

If the O2 sensors have failed and are covered under warrentee.

Who cares what the state law is-MB should replace them. It is critical to replace them BEFORE they kill the PRECAT and CAT.



Michael

After reading the fine print it says that the sensors are good for 2 yr / 24k miles

I thought the Federal law was all emisson related parts 80k.


Have you tried talking to the service writer about this????


Michael

Every year the "covered" items list CHANGE & even the covered time & mileage has changed at least 3 times in the last 10 years. OXYGEN sensors are maintence items. READ any info from BOSCH or other O2 sensor companies & see if they suggest 100K as maximun life. BMW suggests that they should be replaced EVERY 100K miles as part of normal servicing.

only some emissions parts are covered for 80k, sensors as stated earlier are not (at least for the MY'00 ML)