This is a sources sought notice for a diesel engine used in the A2 Series HMMWV, with a minimum quantity of 69 units and an estimated three-year requirement of 1,035 units. The notice explicitly states it is not an active solicitation for bids or proposals. Qualification testing and source approval are mandatory to become an eligible supplier for future competitive opportunities. Being an approved source does not guarantee any contract awards. The performance location and budget information are not specified in this notice.