This module comes with a 1 year warranty. Core return is required. Please read full warranty terms and conditions.

Core must be returned within 30 days of receiving our module. Your core must be complete, no missing parts. The part number of your core must match the part number of the module you purchased. We will not accept cores with water, fire, or physical damage. If you or someone else previously attempted to repair the module, we will not accept it as a core. Please wait until you receive our module and confirm that it is working properly in your vehicle before returning your core. We will include return instructions and return address info in the package. Buyer is responsible for return postage.

You will have to eliminate every possible electrical short on the vehicle before resinstalling the ECU or the computer will be damaged again. Bad coils must be replaced, spark plugs, wires, injectors and head gasket tested for possible failures. IAC valve must be replaced if P0505 code present. If your computer is damaged as a result of failing to follow these instructions, warranty will be voided. 

No reprogramming of your vehicle keys is required, unless your vehicle has a built-in immobilizer and your keys have a chip inside. In this case, reprogramming procedure can be performed by a locksmith that works with car keys, at a repair shop that has an appropriate scanner, or at your local Nissan dealership.