Question about suing companies?

Okay so today my brother unfortunately set his car on fire. He had a 2006 Subaru Impreza. I don't know the full story yet because I'm waiting for them to come home but all they told me was that the fireman told them that the fire started because the radar detector overheated. He has a radar detector that detects cops if you didn't know what I was talking about. So I wondering if the insurance doesn't cover my brother's totaled car then would we be able to sue the company that makes the radar detectors?