Product: 12V 150W Car Heater for BMW Z4 Roadster / Coupe / M40i (2002–2025) Key benefits Rapid cabin warming and fast defrosting: starts airflow immediately and shifts to warm air to clear frost and windshield fog quickly, reducing wait time in cold conditions. Year‑round utility: 2in1 heating and fan modes provide heat for winter and improved airflow for warmer months. Reliable performance: steady, even heat distribution from volume convection airflow improves comfort for driver and passengers. Easy to use: plugs into the 12V cigarette lighter and switches between heating and fan modes with a simple control. Compatibility and safety Designed for BMW Z4 Roadster / Coupe / M40i model years 2002–2025. Power and voltage: 12V, 150W. Before , confirm your vehicle's cigarette lighter supports 12V/150W operation. Core features 2in1 operation: selectable heating mode for warmth and defrosting, and fan mode for increased airflow without heat. airflow and fast heating: built to generate quick warm air and circulate it to help clear windows and warm the cabin more evenly. Durable construction: alloy heating wire for consistent heat output, resistance to aging, and longterm use; outer components engineered to resist deformation or cracking at operating temperatures. Portable and simple setup: plugandplay design for quick installation and removal as needed. Performance and materials Heating element: alloy heating wire provides steady warmth and withstands pressure and repeated use. Housing and components: selected to maintain shape and integrity under higher temperatures, supporting reliable seasonal use. Practical applications (examples) Winter morning commute: plug in to defrost the windshield and warm the cabin before driving, reducing time spent scraping ice or waiting for the factory heater to warm up. Coldweather errands: use the heater while parked or idling to keep passengers comfortable and maintain window visibility. Summer ventilation boost: switch to fan mode to improve airflow in the cabin when open windows are not ideal or when additional circulation is needed. What to expect in use Quick start: airflow begins immediately when turned on and transitions to warm air in heating mode. Even warming: circulating convection airflow helps distribute warmth across the cabin rather than concentrating heat in a single spot. Seasonspanning utility: designed for repeated use across colder and warmer months without a need for complex installation. checklist Confirm your BMW Z4 (Roadster/Coupe/M40i) year and that the vehicle's cigarette lighter can supply 12V at 150W. Intended as an auxiliary heater/fan; follow vehicle and local safety guidelines when using electrical accessories. Specifications Voltage: 12V Power: 150W Compatible models: BMW Z4 Roadster / Coupe / M40i, years 2002–2025 Modes: Heating and fan (2in1) This heater provides a practical, durable solution to faster defrosting, quicker cabin warmup, and improved airflow without complicated installation.