Achieving ultra-low NOx emissions remains a major challenge in diesel emission control worldwide, especially as increasingly stringent regulations are introduced globally. Selective Catalytic Reduction (SCR), the leading NOx reduction technology in diesel systems, performs best when both heat and ammonia are available. At the same time, any proposed solution must also be cost-effective and economically viable. In this work, we present a low-cost Electrically Heated Mixer (EHM). EHM not only significantly reduces urea deposit formation, thereby lowering warranty costs and mitigating failure modes, but also enhances SCR efficiency, especially in challenging low-load conditions having low exhaust temperature. EHM is also ideal for rapid heat-up and urea injection during engine cold-start conditions ( <100 °C) enabling swift NH₃ formation and storage in the SCR catalyst. Additionally, it enables early urea injection (~ 130 - 150 °C), improving SCR efficiency in low temperatures below 200 °C. While in cold-start EHM can produce ~ 5 kW for rapid heat-up, it usually requires only ~ 0.25 - 0.5 kW for most of its operation. Data will be shown that even on a fully aged aftertreatment system, EHM significantly enhances tailpipe NOx reduction - by several multiples compared to systems without EHM - and in some cases by up to 100-fold, far surpassing tailpipe NOx limits required for newer regulations such as Euro VII, China VII, Bharat VII and future ones. Both engine data and modeling analyses will be presented. Additionally, a pathway for integrating artificial intelligence - particularly machine learning - with EHM will be explored, offering the potential to achieve near-zero tailpipe NOx emissions.