BMW X3 owners listen up! This rear brake pad wear sensor is exactly what you need when your dashboard starts warning about brake service. It replaces OEM part number 34356870350 and fits BMW X3 models from 2018-2022, plus X4 models from 2022. The sensor automatically monitors your brake pad thickness and triggers a warning light when it's time for replacement - super important for maintaining safe braking performance. Made from high-temperature resistant materials with metal, rubber, and plastic components that can handle the heat and stress of daily driving. It's 76cm long with a 1.2cm installation hole and 2-pin connector for easy installation. While this isn't an OEM part, it meets professional specifications and delivers stable, durable performance. When your brake pads wear down, this sensor ensures you get timely warnings before you run into serious safety issues. Installation is straightforward for any mechanic or confident DIYer. If you want to keep your BMW's braking system in top condition without paying dealership prices, this wear sensor is definitely worth considering. Quality replacement that does the job right!