Any good mechanic will be able to tell you if the car has 143k on it.
Yes there is. It is digital, and seen next to the odometer reading.
It is the mileage that is actually on the car. If the odometer is replaced, the correct reading is written down. Add that to the reading of the replacment odometer and you have the actual mileage on the car.
Drive slower, and the speedometer decreases. If you are asking how to (illegally) decrease the odometer's kilometer reading, then shame on you.
Mostly all the vehicles that I have worked on with a digital odometer cannot be lowered. Their is an actual manual odometer that reads to the engine computer that sends digital readout to the odometer, that cannot be reset or changed if you were to try to it would disable the vehicle and would need to be taken to the manufacturer garage for service to reset computer but would still give old odometer reading. If the computer were to come out of another car the odometer still wouldn't change. Government is very very strict with odometers these days. I disagree with above that digital odometers "can't" be tampered with, indeed they can provided the right hardware/software is available, many digital odometers can be manipulated through a connection made on the cars diagnostic plug or through connections made to the instrument panel cluster. A search of the internet will show up many companies that sell hardware/software to do digital odometers
If the vehicle has an analog odometer, there is no way of telling the exact mileage. Vehicles with digital odometers usually have an accurate record of millage stored in the vehicle's computer. But note that early digital odometers kept track of mileage on a computer chip that could be changed to reflect an inexact reading.
It is the odometer in kilometers, the first is in miles.
It is against the law to change an odometer meter please
The exact mileage per year is the odometer reading at the end of the year minus the odometer reading at the beginning of the year. If you don't have the odometer reading from the beginning of the year, the next best thing is to subtract an older odometer reading from the reading at the beginning of the year, then divide the difference by the number of years between readings. Without any odometer readings from the past, the best you can do is to calculate the average annual mileage over the life of the truck, which is the current odometer reading divided by the truck's years of service.
By driving the vehicle
uotside temp sensor in front of the radiator has gone bad
This question is not answerable.
There isn't a separate computer for just the odometer. Attached to the firewall behind the coolant bottle is the main computer. There are 3 cables that plug into the front of the computer and the odometer is in there. When you buy a new or refurbished computer for your jeep you need the vin number and the odometer reading so the computer can be programmed for your jeep. Meaning the odometer reading is in the main computer