The truth is that a really good and experienced windshield repair technician can repair a crack from one end of your windshield to the other. In other words, almost any size crack can be repaired on a windshield. A wise repair technician would advise the customer to actually replace the windshield instead of repairing such a large crack for a number of reasons. One major reason is that windshield repair cost are typically based on the size of the damage. To repair a crack that exceeds 12 inches can cost about as much as it would cost to replace the whole windshield on some cars. Another reason is that long cracks may still be visible on the windshield even after it has been successfully repaired. If you know that viewing this crack on your windshield everyday will drive you crazy, then replacing is the way to go. Most of our long crack repairs are performed on expensive luxury cars where it may cost $1100 to replace the windshield. In this case, some customers will live with a $200 windshield repair until they are ready to replace the windshield.