The BMW i3s Transmission Oil Cooler guarantees stable driveline temperatures, resulting in reliable performance on the city commute and spirited weekend trips. This Transmission Oil Cooler is integrated into the liquid cooling loop present in every BMW i3s. Hot lubricant flows through a compact oil-to-water core, enabling the fluids to warm up quickly, even after a cold start, while preventing heat soak when the single-speed gearbox is pushed hard. Since the Transmission Oil Cooler uses coolant already circulating for the battery and motor, it does not add much weight or complexity, which is what BMW efficiency engineering is all about. If you own an i3s that launched in 2018 or got a facelift later, you can just plug and play. For both production years, the same Transmission Oil Cooler footprint fits. The Transmission Oil Cooler ensures optimum viscosity, which ensures accurate transmission feel, longer life of the lubricant, and lesser interior wear, which consequently allows the complete propulsion system to fulfill stringent safety standards. While tackling steep mountain climbs or executing rapid successive accelerations, the Transmission Oil Cooler ensures that the high temperature reached by the fluid remains below the critical limit of thermal breakdown. This prevents an interruption to the smooth torque delivery typical of the BMW electric driving experience. The design is sealed from oil to water, which means debris from the road won't damage it. That's great if you're an urban or suburban user who wants parts that last and just work. Regular replacement of the coolant keeps the flow passages free and clear, allowing the Transmission Oil Cooler to continue doing the job of protecting the i3's power module for thousands of worry-free miles, further establishing the model's forward-looking reliability. For any BMW fan choosing an i3s for its electric zip, the Transmission Oil Cooler is quiet insurance against heat-related surprises. The BMW i3s remains a leader among compact EVs thanks to this reliable piece of technology.
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