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The Engine Control Unit (ECU) for small engines is facing challenges with regard to performance, size and cost. In many instances, the customer requirements often contradict each other. Examples include higher performance at lower cost or smaller size, both of which can cause thermal challenges. In order to meet varying performance requirements in a platform approach, the ECU must provide a wide range of functionality. Providing a solution that can meet these flexible requirements will result in an increased component count and larger ECU size. An optimized feature set in the right package can help alleviate these issues. The ECU must be impervious to a wide range of environmental conditions, such as temperature, humidity and vibration. Restricted air flow must also be considered when designing an ECU. Existing approaches often apply the use of large aluminum housings to provide a strong mechanical support with good thermal performance.