O.K. guys tell me how long will it last. On second thought I will give you an update on how long it will last. Read the codes on the Ml-320 and recieved the po170& po173. Two reasons ,one check engine light was on and two vehicle was very slow in acceleration between 3000-4000 RPM. Would almost stall out under hard acceleration.
Tried cleaning sensor (mas) with carb cleaner and had no response. Same performance and same engine light back on.
Decided to use CRC electronics cleaner .Cleaned both sides of sensor with just the spray.Had to place the small tube on CRC thru the wire mesh on back side of sensor .Cleaned all the contacts on the cannon plug and reinstalled.

The vehicle runs great. No check engine light and quick acceleration to 5500 RPM.