N.H. Rev. Stat. Ann. § 357-D:10

In any action by a consumer against the manufacturer or distributor of a motor vehicle based upon the alleged breach of an express warranty made in connection with the sale or lease of such motor vehicle, the court, in its discretion, may award to the plaintiff costs and reasonable attorney's fees. If the court determines that the action was brought with no substantial justification, it may award costs and reasonable attorney's fees to the defendant.