Sorry, I went through that with one of our two 2007 Corollas. Dealer said there there were two or three years that did it. Main odometer quits at 299,999. Pretty silly for a Corolla. I use one trip odometer for fuel mileage, zero it when I fill with gas. The other is for oil change intervals. I don’t go by the 5,000 mile reminder (try to remember to reset it 2,500 miles after I change oil, but usually forget), because I’ve gone to 7,500 mile changes with Castrol Edge synthetic (highway use). I just go by that second trip odometer and do the math. When I do an oil change, I add the trip odo reading to the true main odo total, then write that in my service book. As long as I have my book and don’t lose track, I know the total miles on the car.