Coolant Overflow Expansion Reservoir Tank with Cap for BMW 520i-840i (2015-2021)
POKESS Coolant Overflow Expansion Reservoir Tank with Cap is a precise, durable replacement designed for BMW models from 2015 to 2021. This dedicated coolant reservoir helps manage expansion and contraction in your cooling system, preventing overflow and keeping the engine running at optimal temperatures. With an OE-style connection for BMW 520i, 530i, 540i, 630i, 730i, 740i and 840i, it restores the factory fit and function you rely on during everyday driving and spirited V8 performance alike.
OE references for this tank include 17138610656, 17138742975, 17139884859, and 17117639020, providing confidence in a true replacement part. Compatibility is for reference—before purchase, please compare the Part Number with your original part to ensure an exact match. Using the wrong part can lead to fitment issues or coolant leaks.
Designed to be a straightforward direct-fit replacement, this reservoir comes with a cap for a complete, ready-to-install solution. Originating from Mainland China, it adheres to automotive-grade standards to support reliable cooling performance for years of driving.
All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.
Benefits & Tips
- Efficient coolant management: Captures excess coolant during heat-up and returns it as the system cools, helping maintain correct pressure and reducing the risk of leaks.
- Protects the cooling system: A dedicated expansion reservoir minimizes air pockets and ensures smooth circulation, supporting heater performance and engine temperature control.
- Easy replacement: This tank matches the original mounting points and capacity, making installation quick and reliable; inspect hoses and the cap during service to maintain a tight seal.
Product specifications
- Brand: POKESS
- Part numbers / OE references: 17138610656, 17138742975, 17139884859, 17117639020
- Compatible vehicles: BMW 520i, 530i, 540i, 630i, 730i, 740i, 840i (2015–2021)
- Year range: 2015–2021
- Includes: Coolant Overflow Expansion Reservoir Tank with Cap
- Origin: Mainland China
- Notes: Compatibility is reference; verify Part Number against your original part before purchase.
Package includes
- 1 x Coolant Overflow Expansion Reservoir Tank with Cap
Warnings / Reminders
Compatibility is for reference. Before purchase, please compare the Part Number with your original part. It must be the same; otherwise, this may not be the correct replacement for your car.
Language support: Not specified in product data.
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