It should not have an impact
Thanks to all those with constructive comments.
For those interested in this kind of thing, State Farm (at fault party insurance company) offered us an $1800 check for waiving our right to future lawsuits involving injuries. We obviously took it because she didn’t have injuries… but I’m curious as to how this affects my negotiation for diminished value. Have a feeling it’s not good that we’ve already accepted that $1800.
Back in 2017, my wife totaled our 2000 Honda Accord (pissed me off b/c was going to be a perfect 1st car for my son that just turned 16) when a driver turned left in front of her on a red arrow and she T-boned him. My wife and 10 yr old daughter were not hurt at all. The guy's insurance within a day or so offered us $2000 for the same thing as you got and we took it right away.
My situation was a little different since our car was totaled, but I fought with them for several weeks on the value of that car. I did a LOT of research on the value of that car (17 yrs old, 170K miles) and came up with a list of a dozen comparable cars priced anywhere from $3200 up to $5500. So, when they offered me $1500 for the car, I started fighting. I went back and forth with them several times and they continued to lowball, offering $1750, then $1950, and then $2200 which is the amount they said was the best they could do. After I got the email with their "best" offer of $2200, I responded with $4000 would be the lowest amount I would take and that it was fair based on current comp vehicles for sale in my area and based on the condition of the vehicle prior to the wreck. The one other thing I told them at this point was that this would be my final offer. They would either accept it and send me a check, or I would be contacting the Texas Dept of Insurance Commissioner. I had an email stating they would accept in less than 10 minutes and they overnighted the check to me.
Find comparable vehicles for sale w/ wreck damage & w/out wreck damage if you can (may be tough since the car is so new, but possibly you can use same make & model a year or two old just to calculate the value impact). I would use that as my basis for loss of value. Do your homework and throw data at them. Then, if/when they won't agree to your bottom number, the threat of calling your states Insurance Dept/Commissioner will usually make them buckle as they do not want to deal with those repercussions. I have had several friends do what I did after I told them about it and it has worked for every one of them. Also, using the threat of that call saves you having to get a lawyer involved.