BMW Radiator Expansion Tank Coolant Cap | OEM Part No. 17117521071 17117639020 17137516004

Revitalize your BMW's cooling system performance with our direct replacement radiator expansion tank cap. If you're experiencing issues with a faulty, leaking, or damaged cap, our solution offers a seamless fix. Designed for easy installation, this replacement ensures optimal function, allowing you to maintain your vehicle's performance with confidence. Don't let a faulty cap compromise your BMW's cooling system—upgrade today for peace of mind on the road.

• Restores Cooling System Seal
• High-Quality Material
• Factory Directional Arrow
• OE Fitment

FITMENT: 

• 1 Series – E82 / E88: 128i, 135i (N52, N54/N55)
• 2 Series – F22 / F23: 228i, 230i, M235i (where applicable) 
• 3 Series – E90 / E91 / E92 / E93: ­325i, 328i, 330i, 335i/xi (N52, N54/N55) 
• 4 Series – F32 / F33 / F36: 428i, 430i, 435i, 440i (N20/N55/B58 etc.) 
• 5 Series – F10 / F11: 528i (N20/N52), 535d, 535i (N57/N55) 
• 6 Series – F12 / F13 / F06: 640i (N55), etc. 
• 7 Series – F01 / F02: 740i / 740Li (N54/N55) 
• X Series (SUVs) – e.g., X1 E84, X3 F25/G01, X4 F26/G02, X5 E70/F15/G05, X6 E71/F16/G06. 
• Z4 – E89: sDrive28i, sDrive35i (etc.) 
• And more across many years up to 2020’s G-chassis models.

Replaces OEM Part No. 17117521071 17117639020 17137516004

BAVMODS Part No: BAV0000083A

Please refer to the “Fitment” section in the product description for compatibility details.