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 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.