BMW owners, listen up! If you're dealing with coolant issues or that annoying check engine light, it might be this simple little part - the coolant reservoir cap. This Motoforti replacement is designed to directly replace OEM part number 17117521071, and it fits a ton of BMW models from 2007 up to 2022. We're talking 128i, 135i, 228i, 320i, 328i, 335i, 428i, 528i, and even X1 through X7 models - seriously, check the specific fitment list for your vehicle. The cap measures about 3.46 x 1.81 inches and is made from durable plastic that matches the original equipment specifications. Its job is crucial - maintaining proper pressure in your cooling system to prevent overheating and keeping coolant from leaking out while keeping contaminants from getting in. If your old cap is cracked, lost, or just not sealing properly, this replacement can solve coolant loss issues and prevent more serious cooling system problems down the road. Installation is straightforward - just remove the old cap and push this one on until it clicks into place. Make sure it's seated properly to avoid any leaks. This is an aftermarket part, so it's not OEM, but it's designed to match the fit and function of your original cap at a much more affordable price. For BMW owners who want to maintain their vehicles without dealership prices, this simple replacement part can save you from bigger repair bills and keep your cooling system functioning properly. Always check your specific model and year against the compatibility list before ordering!
Free 30-day returns 
Free 30-day returns
