WARRANTY: All new merchandise sold by Fuel1 Injector Services is only subject to manufactures warranty, if any. Warranty items are subject to submission to the manufactures for inspection and approval for repair or replacement of merchandise. Customer however, will be responsible for all shipping and handling fees. No labor or inconvenience fees may be included in any warranty claims. If there is a defect that was caused by customers abuse, negligence, mishandling, or improper installation, warranty will be void.There is no warranty on used products, electrical parts, and engine parts. Check your state and local laws regarding the use of any parts. If the product is damaged due to shipping then the customer is responsible for filing a claim with the shipping company. If there are any issues whatsoever, please communicate with us. We have great customer service and most issues can be dealt with in a timely and responsible manner. Thank you for shopping Fuel1 Injector Services.