A high APR (“annual percentage rate”) car loan is one that charges higher-than-average interest rates. The legal limit for car loans is around 16% APR, but you will find lenders that get away with charging rates of 25% or more.
Since APR represents interest and added fees, you will want the smallest APR possible. If you have good credit (say, between 700-749), an ideal APR is around 5%. If you have bad credit (say, less than 650), your APR could climb to 16% or 20%.