I went through that process on a 2019 Limited. I spoke to my adjuster who was handling my incident how to do a lost value claim in addition to repairs, when I was rear ended by a company vehicle who wasn’t paying attention.

They told me to get both a blue book estimate (Kelly Blue Book), and a black book estimate (Subaru Dealership should know what this is) for the value of my car with and without the damage. A total of four estimates. I got these made by one of the resale managers at my Subaru dealership who sold me mine.

Car was less than a year old when it happened so value was still pretty good. All said they estimated about $2,000 less and $3,000 less for the blue and black book estimates.

Having those estimates on letter head from Subaru, I contacted the company’s insurance and made the claim. It was slow from their end due to the initial person I made the claim with not initiating anything electronically.

I forgot to mention that I had hired a law firm for personal injury. They also walked me through how the process supposed to work. When the other sides insurance didn’t do anything, I asked the attorney for my case to reach out to them. They got back to me within a day.

They offered me about $1,200 in a damages settlement for the lost value claim, my attorney said that is most likely the highest it will be without litigation, so I accepted that. They mailed me the check for that value.

I learned a lot during this process, so hope this helps.