Why is my Ford Fiesta mileage display not working?

In most cases, if the mileage display isn't working in a Ford Fiesta then nothing else in the cluster is lit up either. In this case, You're likely dealing with a blown fuse. This particular fuse should be number 22 in the fuse box inside the passenger compartment. However, You should look at the diagram on the inside of the box cover to verify this. If it's not a fuse, it could be a wiring or electrical issue. A connection may need to be fixed or a wire replaced. In more serious cases, the entire instrument cluster is bad and needs to be replaced, You can expect to pay between $920 and $950 with labor accounting for $70 to $100 of that amount.