What mileage do you change the timing belt on a Ford Focus 1800 turbo diesel 2002 model?
Listed in your owner's manual. replace belt at 100,000 mls I checked with Ford no information in owners manual.
On a 2003 Ford Focus : According to the Gates website ( they make timing belts etcetera ) It shows that the timing belt used on the 2.0 liter SOHC and DOHC engines should be inspected and replaced if necessary at 120,000 miles ( but it also shows that the engines are interference engines ) The 2.3 liter four cylinder in a 2003 Ford Focus has a timing CHAIN
Do NOT use Diesel fuel in a Ford Focus. The engine will stop running and you will have to drain the gas tank to rid the car of the diesel fuel. Gasoline engines are not designed to run on diesel. They do not have enough compression to cause the diesel fuel to combust The only engine used in a 2000 Ford Focus was the 2.0 which is NOT a diesel engine.
If it's a newer year Focus I'd say it's letting you know it's gone longer than the recommended mileage to change the oil. My BMW assumes 6000 miles is the preferred mileage to change the oil, but its recommended to change the oil sooner in my opinion. Clean oil makes engines last longer in the long run.
80,000 to be safe, 100, 00 if your're nice when you drive and don't live in a severe climate. The Focus has an interfearence engine which means if that timing belt breaks before you change it you'll probably bend or break some valves too creating an expensive repair. Better to err on the side of caution with a Focus. (mine's an '02)