97 mazda 626 jerking when car is at a stop but only in drive... i know my o2 sensors need to be replaced... but im just afraid that its not gonna be what fixes it.. if i go at a steady speed and dont stop the car doesnt jerk.. so could the o2 sensors be the only cause for this problem?? thanks a lot..

It's possible. Difficult to try to analyze anything when possibility of other causes exist.