You may decide thathiring a lemon law lawyer could be useful in getting your case resolved, particularly if arbitration has failed. A Washington vehicle proprietor may request lemon regulation arbitration as long as 30 months after taking supply of the vehicle. A ‘nonconformity’ is a defect that "substantially impairs" the use, worth, or security of the motorized vehicle making the automobile unreliable, unsafe for odd use, or diminished in resale worth in comparability with comparable autos.