Because the wipers are a safety feature, they qualify for lemon law. Personally I keep mine out of the rain anyway.
CA lemon law states the following:
Under California Lemon Law, if you took your New or Used Car, Truck, Van, RV, Motorcycle or Boat in for repair during the manufacturer's warranty period and you gave the dealer a reasonable number of attempts to repair the vehicle and it continues to malfunction, you may be entitled to your money back or to a new replacement vehicle. Under California Lemon Law, it does not matter if you purchased or leased the vehicle. You may even qualify under California Lemon Law if the vehicle was purchased or leased primarily for business use. The California Lemon Law also applies to a used vehicle if it was sold with a warranty (including a portion of the original manufacturer's unexpired warranty). What constitutes a reasonable number of attempts under California Lemon Law depends on the circumstances of each case. For example, a safety related problem may require only two attempts to be considered "reasonable" under California Lemon Law, whereas other types of problems may require more attempts. The problem must be one which substantially impairs the vehicle's use, value or safety.
