Wis. Stat. § 632.365

An insurer may not use odometer reading data collected in the course of an inspection under s. 110.20 (6) or (7) as a factor in setting rates or premiums for a motor vehicle liability insurance policy or as a factor in altering rates or premiums during the term, or at renewal, of such a policy. However, an insurer may use such data as a basis for investigation into the number of miles that the motor vehicle is normally driven.