Orders from Chinese Warehouse

Once payment is confirmed, we’ll ship from our China warehouse based on the handling time for in-stock items, which generally takes 2-10 business days. Shipments are sent via DHL or UPS, with an estimated delivery time of 3-7 business days.

Orders from U.S. Warehouse

Orders from our U.S. warehouse will be shipped within one business day after payment is received. If an order is placed before 10:00 AM PST on a business day, it will usually ship the same day. All U.S. shipments are sent via UPS or FedEx with a tracking number, and delivery is typically within 3-7 business days. Important Details

The listed shipping fees apply only to the 48 contiguous U.S. states.

For customers in Guam, Puerto Rico, Northern Mariana Islands, the Virgin Islands, the Marshall Islands, Alaska, or Hawaii, please reach out for an accurate shipping quote. We currently do not ship to P.O. boxes, APO/FPO addresses, or military mailboxes. For security, we only ship to addresses confirmed by PayPal, so please double-check your address before completing checkout.

30-Day Free Returns and Refunds

We offer a 30-day satisfaction guarantee on all purchases. If you are notcompletely satisfied with your product, you may return it in its originalpackaging within 30 days for a full refund, without any restocking fees. Please note that the buyer is responsible for return shipping costs.

For any warranty claim or return, please contact us first to receive an Item Warranty Claim Form or a Return Merchandise Authorization (RMA) number. Each RMA number is unique to your individual claim and is required for processing any return. Returns without a valid RMA number will be refused upon delivery.

1-Year Unlimited Mileage Quality Warranty

Our products come with a 1-year quality warranty, with no mileage limits. If you receive an item that is incorrect, defective, or damaged, we will cover the return shipping costs and offer a full refund or replacement, including the original shipping cost. Return shipping must initially be paid by the buyer, and we will reimburse this cost once the defect is verified.

Warranty Coverage

This warranty covers the cost of the item itself and excludes labor, installation, towing, additional repair charges, and any incidental costs associated with replacement or repair.

Additional Terms

All return shipping charges must be prepaid by the customer. Returns sent with collect or on-delivery charges will be refused. Please allow up to five business days for claim processing, as reviews may involve departments in both the U.S. and our corporate team.

Electronics, such as ECUs, sensors, and wiring harnesses, are non-refundable unless otherwise noted. Once opened or tampered with, these items are no longer refundable.

For mistaken purchases or items no longer needed, refunds will exclude shipping charges and may incur a 20% restocking fee if the item is undamaged.

For complete warranty details, please refer to our dedicated warranty section. Our customer support team is available to assist you throughout the process.

Online Support Hours： Tuesday to Saturday, from 4 PM to 12 AM (Pacific Time)

Customer Service Center： Monday through Sunday

Our warehouse operates Monday to Friday, though we currently do not offer a pickup service.

If you have any questions, simply leave us a message using the "Ask a Question" feature at the bottom of our website. One of our sales representatives will get back to you within a few hours.

For urgent inquiries, please email us directly at our official email: service dyneproengine.com