If your car’s repairs are paid for by the other driver’s car insurance company, your modifications will likely be replaced by stock parts. But the at-fault driver’s insurer may consider replacing your custom parts if you can prove that they were covered either by your standard car insurance policy or through CPE coverage. That’s because you’ve established value for them with documentation before the accident. The same goes if your car is totaled. Modifications may be considered if you can show that they were covered under your own policy. You may have to show receipts to document their value. Bear in mind, however, that in many cases, custom parts don’t increase the value of your car as much as you think they do. Even if they are expensive and you appreciate how they add to the overall aesthetic of your vehicle, it doesn’t necessarily mean they add a significant amount to your car’s actual cash value.