All our products carry 2 year, limited, return-to-base warranty. Please understand that while our products do have a warranty, many times an automotive product may be damaged due to bad installation, bad electrical system (ie an alternator that is overcharging), user negligence (ie jumpstarting in an incorrect way) or other adverse conditions (ie flooding). MS Labs may, at it's sole discretion, refuse to warranty an item that has been misused, abused or affected by a condition that was not designed to operate under. The buyer is responsible in returning the product to MS Labs, including any shipping costs.