Wisconsin Statutes Insurance (Ch. 600 to 655) § 632.375. Motor vehicle repair practices; restriction on specifying vendor

(2) Prohibited practices. (a) No insurer may require that, as a condition of the coverage specified in sub. (1), repairs to a motor vehicle must be made by a particular contractor or repair facility. For purposes of this section, a consumer has the right to select the motor vehicle repair facility of his or her choice.

(b) No insurer may fail to initiate and conclude with due dispatch an investigation of a claim for repairs to a motor vehicle on the basis of whether the repairs will be made by a particular contractor or repair facility.