There are many cases where it becomes obvious that the windshield needs replacement. However, in some cases, it is not as obvious. Sometimes, even smaller cracks can demand a new windshield to be installed. In general, if your windshield has three or more cracks, then you will probably need a windshield replacement. Similarly, if a bigger crack is on the driver’s side then it will require a full replacement because windshield chip repair can leave some sort of residual marking which can cause problems for the driver.