Considering to buy, is this expensive to replace ?
has 160,000 miles, seller's price 1900.00.
Good buy or no ?

 

Try speaking in complete thoughts or sentences
It helps when you want more information.

Do you have a trouble code? For Bank 1 Sensor?
A 2006 Elantra with 160k miles for $1900 dollars is a good price if the condition of the car is in average running condition.
Did you do an inspection of the tires (for even wear)?
Did you inspect the suspension?
Did you inspect the engine bay for oil leaks?
Did you inspect the car to see if it was in a fender bender?

Good buy or no?
I don't know. I can't see the car.