This Coolant Expansion Tank Cap for BMW 1 2 Series X1 X2 MINI Cooper a high-quality OEM-standard replacement designed to maintain proper pressure in the coolant reservoir, prevent leaks, and ensure optimal engine temperature under all driving conditions. Manufactured from durable heat-resistant materials, this cap guarantees long-term reliability and protection for your vehicle’s cooling system.

 

Compatibility:

• for BMW 1 Series F40 2019 - 2021 (1.5L 118i, 2.0L 128ti)
• for BMW 2 Series F44 2019 - 2021 (1.5L 218i)
• for BMW X1 F48 2015 - 2021 (1.5L sDrive 18i, 2.0L sDrive 20i)
• for BMW X2 F39 2017 - 2021 (1.5L sDrive 18i, 2.0L sDrive 20i)
• for MINI Clubman F54 2014 - 2021 (1.5L Cooper, 2.0L Cooper S)
• for MINI Hatchback F55 / F56 2013 - 2021 (1.2L One, 1.5L Cooper, 1.5L Cooper D, 2.0L Cooper S)

 

Reference OEM: 17117639024, 17132754264, 17135A1BD89

 

Important note: please check the photo and OEM number before purchasing

 

Key Features & Benefits

• Perfect Fit OEM Replacement – designed to meet OEM standards for direct fitment and compatibility for cooling systems.
• Maintains Optimal Pressure – ensures proper pressure balance in the coolant expansion tank, preventing overheating or coolant loss.
• Durable & Heat-Resistant – made from premium reinforced plastic and high-temperature rubber seal for long-lasting performance.
• Leak-Proof Design – advanced sealing technology prevents coolant leaks and maintains system integrity.
• Easy Installation – simple screw-on design; no tools or special skills required.
• Restores Cooling Efficiency – helps keep your engine running at ideal operating temperatures.

 

Specifications:

• Type: Coolant Expansion Tank Cap
• Mounting Type: Screw connection
• Thread Type: Inner thread
• Color: Black
• Material: Reinforced Plastic and Rubber Seal
• Pressure rating: 140 kPa (1.4 bar)

 

Installation Guide (Quick & Easy)

• Allow the engine to cool completely before opening the cooling system.
• Locate the coolant expansion tank and remove the old cap by turning it counterclockwise.
• Clean the sealing surface of the tank neck if necessary.
• Install the new cap and tighten it clockwise until secure.
• Check for leaks after engine warm-up.

 

Package Includes: Coolant Expansion Tank Cap