Review on URO Parts 42mm P/S Reservoir Cap 🔍 Seal with 2mm Cross Section - Enhanced SEO by Payton Stovall

I had a slow leak from my 135i's power steering fluid reservoir which was causing the outside of the reservoir to become covered in debris. I installed this 0 ring 10,000 miles ago. It fitted perfectly and fixed the leak. If you're not sure if the cap is broken, it's worth a few bucks to replace it before replacing the entire cap.