- Compatibility: Designed specifically for Mini models, this overflow fuel cap for the radiator coolant reservoir is a direct replacement for OE number 17107515485. Ensure compatibility with your vehicle by checking original factory standards before purchase. - Simple Installation: This coolant container lid is user-friendly and can be installed without the need for complicated tools. Replace your old or damaged cap effortlessly, ensuring a perfect fit for your vehicle. - Quality Assurance: Our coolant expansion bottle cap is manufactured under strict quality control standards. With an improved design and advanced production technology, we prioritize delivering high-quality, cost-effective products for a reliable shopping experience. - Durable Material: Made from automotive-grade thermoplastic, this cap is heat-resistant and highly durable. Its robust construction provides long-lasting performance, allowing you to use it confidently over an extended period. - Practical Applications: Ideal for everyday driving, this cap ensures that your coolant system operates efficiently, preventing leaks and maintaining optimal engine temperature. It's also a smart choice for routine maintenance or repairs, enhancing the reliability of your vehicle. - Key Specifications: - Diameter: 46 mm - Material: Automotive-grade thermoplastic - Function: Prevents coolant overflow and maintains system pressure Choose our high-quality coolant expansion bottle cap for a reliable, hassle-free solution that keeps your engine running smoothly.