I own a 2013 LS 460 that I bought here (slightly u...

I own a 2013 LS 460 that I bought here (slightly used) in July 2015. At the start of the lockdown (March 2020) a part in the car malfunctioned. I figured out a "workaround" which was mildly irritating and which was causing extra wear on the part. Lexus of Towson fixed the problem on Sept 14th when I finally brought the car in, and at payment time they told me that there was no charge because the part should not have malfunctioned. The charge would have been $600+. Thank you :)