SDCL § 32-6D-7: Affirmative defenses to claim against manufacturer.

It is an affirmative defense to any claim against the manufacturer under this chapter that:

(1) An alleged nonconforming condition does not significantly impair the use, market value, or safety of the motor vehicle; or

(2) A nonconforming condition is a result of abuse, neglect, or any modification or alteration of a motor vehicle by a consumer that is not authorized by the manufacturer.