All Emission Control Optimizer "ECO" Systems come with a 5-year Warranty from the manufacturer. Within that term, if any defect occurs with your unit due to manufacturing, Emission Technology, Inc. will replace the unit purchased.

All systems come with a 90-Day Money Back Customer Satisfaction Guarantee except custom made Eco Systems (ECO-5 and ECO-7) from your date of purchase. If you are not satisfied with our product, return it to the location where you bought it within 90 days for a refund of the purchase price, except for installation charges paid if applicable.