Expansion & Overflow Tanks
More informationAt the Global Parts automotive store, we offer a wide selection of original used car parts, including expansion tanks for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen and others. The expansion tanks we offer undergo quality control so that you can be sure that you are receiving a top-class product.
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Part no. 8570079
BMW E81 E87 E90 E92 Expansion Tank Bottle Coolant Radiator Tank Diesel 8570079
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7543026
BMW E81 E82 E84 E87 E90 E91 E92 Coolant Expansion Tank Radiator Petrol 7543026
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7607482
BMW E81 E87 E90 E91 E92 Coolant Expansion Tank Bottle Petrol 7607482
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7642160
BMW F20 F21 F30 F32 Radiator Expansion Tank Bottle 7642160
£28.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7552546
BMW X5 X6 E70 E71 Water Expansion Tank Radiator 7552546
£18.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7642158-2
Expansion Tank BMW F20 F21 F30 F32 Radiator Coolant Bottle Petrol 7642158
£37.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7647283
BMW F01 F10 F11 F12 Coolant Tank Bottle Radiator Expansion 7601949
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7787040
BMW X5 E53 3.0d Coolant Header Overflow Expansion Tank Radiator 7787040
£18.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7642160-4
Expansion Tank Bottle BMW F20 F21 F30 F32 Radiator Overflow Reservoir 7642160
£28.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7823544
Radiator Expansion Tank BMW X3 F25 X4 F26 Overflow Tank Bottle 7823544
£23.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7800293
BMW E65 LCI Cooling Water Expansion Tank 7800293
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 1438819
BMW X5 Series E53 Coolant Expansion Water Tank Mounting Fits Radiator 1438819
£16.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7640514
BMW 1 3 Series E87 E90 E91 E92 Coolant Expansion Tank Bottle Petrol 7640514
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7567462
BMW E81 E87 E90 E91 E92 Coolant Expansion Tank Bottle Reservoir Petrol 7567462
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7823544-1
Radiator Expansion Tank BMW X3 F25 X4 F26 Overflow Tank Bottle 7823544
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7639021
BMW E60 E61 F10 F80 M3 F82 M4 Radiator Expansion Tank Cap 7639021
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7647283-1
BMW F01 F10 F11 F12 Coolant Tank Bottle Radiator Expansion 7601949
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 2284601
BMW 3 4 Series F80 M3 F82 F83 M4 Radiator Expansion Coolant Tank Bottle 2284601
£28.95
Free delivery: Jul 03
If paid before 14:00
Part no. 1436257
BMW E60 M5 Engine Coolant Level Sensor Expansion Tank Fluid Level 1436257
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7573781-1
BMW E46 X3 E83 X5 E53 Automatic Expansion Tank Radiator Header 7573781
£18.95
Free delivery: Jul 03
If paid before 14:00
Part no. 8605551
BMW F40 X1 F48 X2 F39 Coolant Mount Radiator Centering Pin Set M6X13,6 8605551
£23.95
Free delivery: Jul 03
If paid before 14:00
Part no. 2248409
BMW E46 X3 E83 Z4 E85 Cooling Water Connector Pipe Radiator 2248409
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 8630170
BMW X5 F15 E70 X6 F16 E71 Coolant Rad Cooling Expansion Tank 8630170
£18.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7788293
BMW E60 E61 E64 LCI Cooling Water Expansion Tank Mount Bracket Support 7788293
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7516004
BMW E60 E63 E90 E91 F10 Radiator Expansion Tank Screw Cap 7516004
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 3403987
BMW X3 E83 E83N LCI Bracket Expansion Tank Bracket Support Mount 3403987
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 2229114
BMW E39 M5 Coolant Expansion Overflow Reservoir Tank Bottle S62 V8 2229114
£113.95
Free delivery: Jul 03
If paid before 14:00
Part no. 8610652
BMW G20 G21 Radiator Coolant Expansion Overflow Tank Reservoir Bottle 8610652
£23.95
Free delivery: Jul 03
If paid before 14:00
Part no. 2283280
BMW 3 Series E46 M54 M3 S54 Petrol Fuel Inlet Expansion Tank 2283280
£18.95
Free delivery: Jul 03
If paid before 14:00
Part no. 6851332
BMW E46 X5 E53 X3 E83 E60 E61 E65 E81 E87 E90 E91 Expansion Tank Power Steering Cap
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7645508
Expansion Tank BMW F45 225xe Mini F60 SE ALL4 Coolant Reservoir Bottle 7645508
£18.95
Free delivery: Jul 03
If paid before 14:00
Part no. 9291286
BMW i3 I01 Coolant Expansion Tank Reservoir Holder Bracket Mount Plate 9291286
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7610369
BMW F01 F02 F03 LCI Cooling Water Expansion Tank Petrol N74 7610369
£28.95
Free delivery: Jul 03
If paid before 14:00
Part no. 9327150-1
BMW i3 I01 Hybrid Electric Expansion Coolant Tank Radiator Fluid Bottle 9327150
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 8610653
Expansion Tank BMW G20 G21 G22 G23 Coolant Overflow Reservoir Bottle 8610653
£23.95
Free delivery: Jul 03
If paid before 14:00
Part no. 1184917
BMW X5 E53 Expansion Tank Petrol 1184917
£18.95
Free delivery: Jul 03
If paid before 14:00
Part no. 8610655
Expansion Tank BMW G11 G12 G30 G31 G32 Coolant Overflow Reservoir Bottle 8610655
£23.95
Free delivery: Jul 03
If paid before 14:00
Part no. 6752034
BMW X5 Series E53 Expansion Tank Diesel Fuel Supply 16116752034 6752034
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 2248409-1
Cooling Water Connector BMW X3 Z4 E46 E83 E85 Pipe Radiator 2248409
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 2284880
Expansion Tank BMW F10 M5 Radiator Coolant Overflow Fluid Bottle F12 M6 2284280
£23.95
Free delivery: Jul 03
If paid before 14:00
Part no. 8089488
BMW F87 LCI M2 Competition Expansion Tank Reservoir Bottle 8089488
£47.95
Free delivery: Jul 03
If paid before 14:00
Part no. 5A1BD89
Mini F55 F56 F60 Radiator Expansion Tank Coolant Bottle Cap Cover Screw 5A1BD89
£18.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7553919-2
BMW E60 X5 E70 X3 E83 E87 E90 E91 F10 Coolant Tank Level Switch Sensor 7546548
£13.95
Free delivery: Jul 03
If paid before 14:00
Part no. 2284880-1
BMW F06 F10 F12 Expansion Tank Radiator Coolant Overflow Fluid Bottle 2284280
£23.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7591214
Expansion Tank BMW X5 F15 Hybrid 40eX Water Coolant Overflow Reservoir 7591214
£32.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7618656
BMW F12 N55 Fuel Tank Breather Valve Vent Pipe Line 7618656
£42.95
Free delivery: Jul 03
If paid before 14:00
Part no. 8610661
BMW X3 G01 X4 G02 Expansion Tank Coolant Reservoir Bottle 8610661
£23.95
Free delivery: Jul 03
If paid before 14:00
Part no. 5A69BC1
BMW F70 F74 F78 Water Coolant Expansion Tank Reservoir 5A69BC1
£56.95
Free delivery: Jul 03
If paid before 14:00
Part no. 7642160-1
BMW F20 F21 F30 F32 1 Radiator Expansion Overflow Reservoir Tank Bottle 7642160
Product currently unavailable
Part no. 7640514-1
BMW E87 E90 E91 E92 Coolant Expansion Tank Bottle Petrol 7640514
Product currently unavailable
Part no. 7800292
BMW E60 E61 E65 X3 E83 Cooling Water Expansion Tank Diesel
Product currently unavailable
Part no. 7642160-2
Expansion Tank BMW F20 F21 F30 F31 Radiator Bottle 7609468
Product currently unavailable
Part no. 7642158
BMW 1 3 4 Series F20 F21 F30 F32 Radiator Expansion Tank Bottle Petrol 7642158
Product currently unavailable
Part no. 7542986
BMW E60 E61 E63 E64 LCI Cooling Water Expansion Tank Petrol 7521189
Product currently unavailable
Part no. 8677649
BMW F20 F21 F30 F31 LCI Coolant Expansion Tank Petrol 8677649
Product currently unavailable
Part no. 7642160-3
BMW F20 F21 F30 F32 Radiator Expansion Overflow Reservoir Tank Bottle 7642160
Product currently unavailable
Part no. 7573781
BMW E46 X5 E53 X3 E83 Coolant Expansion Tank Radiator Header Reservoir 7573781
Product currently unavailable
Part no. 8687503
BMW X1 F48 F45 Mini F55 F56 F60 Expansion Tank Coolant Reservoir Bottle 8687503
Product currently unavailable
Part no. 7642158-3
Radiator Expansion Tank BMW F20 F21 F30 F32 3 Bottle Petrol 7642158
Product currently unavailable
Part no. 8621092
Expansion Tank BMW X5 F15 E70 X6 F16 Water Coolant Overflow Reservoir 7647290
Product currently unavailable
Part no. 7555234
BMW 5 6 E60 E61 E63 LCI N53 Cooling Water Expansion Tank Petrol 7555234
Product currently unavailable
Part no. 2248408-1
BMW 3 Z4 Series E46 E85 E86 Connection Pipe Radiator Bracket Mounting Plate
Product currently unavailable
Part no. 7508008
BMW 7 Series E65 E66 Cooling Water Expansion Tank Petrol 7508008
Product currently unavailable
Part no. 7573780
BMW X5 E53 3.0d M57 M57N Coolant Expansion Tank Radiator 7573780
Product currently unavailable
Part no. 7573781-2
BMW X3 E83 Radiator Expansion Tank Petrol Engine Cooling Unit E46 X5 E53 7573781
Product currently unavailable
Part no. 7642158-1
BMW 1 3 4 Series F20 F21 F30 F32 Radiator Expansion Bottle Tank Petrol 7642158
Product currently unavailable
Part no. 1438819-2
BMW X5 E53 Coolant Expansion Water Tank Mounting Radiator Holder Bracket 1438819
Product currently unavailable
Part no. 7787039
Coolant Reservoir BMW E46 X5 E53 X3 E83 Cooling Water Expansion Tank Bottle
Product currently unavailable
Part no. 8617045
BMW F20 F21 LCI B48 B58 Coolant Expansion Tank Water Reservoir 8617045
Product currently unavailable
Part no. 8570079-1
Expansion Bottle BMW E81 E82 X1 E84 E87 E90 E91 E92 Tank Radiator Diesel 7810592
Product currently unavailable
Part no. 8610819
BMW F10 M5 Expansion Tank Engine Coolant Fluid Bottle Reservoir F12 M6 2284281
Product currently unavailable
Part no. 7542986-1
BMW E60 E61 E63 LCI Febl Cooling Water Expansion Tank Petrol 7521189
Product currently unavailable
Part no. 2283344
BMW E46 M3 Coolant Expansion Tank Bottle Reservoir Fluid 2283344
Product currently unavailable
Part no. 7806038
BMW F10 F11 F12 F13 LCI Expansion Tank Coolant Radiator Bottle Diesel 7806038
Product currently unavailable
Part no. 8617048
BMW 3 Series F30 LCI 330e B48X Coolant Expansion Tank Bottle 8617048
Product currently unavailable
Part no. 8617047
BMW F30 LCI 330e B48X Coolant Expansion Tank Bottle 8617047
Product currently unavailable
Part no. 8677649-1
BMW F20 F21 F30 F31 LCI Coolant Expansion Tank Petrol 8677649
Product currently unavailable
Part no. 8669928
BMW F40 Mini F54 LCI F60 Expansion Tank Coolant Reservoir Bottle B48E 8669928
Product currently unavailable
Part no. 7640515
BMW E82 E90 LCI 135i 335i N55 Radiator Expansion Coolant Tank Bottle 7590626
Product currently unavailable
Part no. 8742660
Expansion Tank BMW X3 G01 F97 X4M F98 Coolant Overflow Reservoir Bottle 8742660
Product currently unavailable
Part no. 2248408-3
Expansion Tank Plate BMW E46 Z4 E85 E86 Radiator Bracket Mounting Trim 2248408
Product currently unavailable
Part no. 7542986-2
BMW E60 E61 E63 E64 Petrol Cooling Water Expansion Coolant Tank 7521189
Product currently unavailable
Part no. 2283500
BMW 3 Series E90 E92 E93 M3 LCI Expansion Tank Radiator Petrol 2283500
Product currently unavailable
Part no. 8619460
BMW F30 Holder Coolant Expansion Tank Top Bracket Reservoir Mount 8619460
Product currently unavailable
Part no. 5A14990
Expansion Tank BMW U06 X1 U11 X2 U10 Coolant Reservoir Bottle 5A14990
Product currently unavailable
Part no. 9846642
BMW G30 Coolant Expansion Bootle Tank Water 9846642
Product currently unavailable
Part no. 5A14989
BMW U06 Coolant Expansion Overflow Bottle Header Tank Reservoir 5A14989
Product currently unavailable
Part no. 8090271
BMW F90 M5 F91 F92 M8 Radiator Expansion Tank Bottle 8090271
Product currently unavailable
Part no. 7787040-1
BMW X5 E53 3.0 d Coolant Header Overflow Expansion Tank Radiator 7787040
Product currently unavailable
Part no. 8610654
Expansion Tank BMW G30 G31 G11 G15 Diesel Coolant Reservoir Fluid Bottle 8610654
Product currently unavailable
Part no. 8614293
BMW F10 Expansion Coolant Header Tank 8614293
Product currently unavailable
Part no. 7925641
BMW i4 G26 Coolant Expansion Overflow Tank Bottle 7925641
Product currently unavailable
Part no. 7610374
BMW F10 F11 Water Coolant Expansion Tank Reservoir N53 Petrol Engine 7610374
Product currently unavailable
Part no. 7552546-1
Expansion Tank BMW X5 E70 X6 E71 Water Radiator Coolant Reservoir 7552546
Product currently unavailable
Part no. 7823544-2
Radiator Expansion Tank BMW X3 F25 X4 F26 Overflow Tank Bottle 7823544
Product currently unavailable
Part no. 7578663
BMW F01 F02 F03 Expansion Tank Filler Neck Tube 7578663
Product currently unavailable
Part no. 8621092-1
BMW X5 E70 F15 X6 E71 F16 Expansion Tank Water Coolant Reservoir 8621092
Product currently unavailable
Part no. 7640515-1
BMW E82 E90 LCI 135i 335i N55 Radiator Expansion Coolant Tank Bottle 7590626
Product currently unavailable
Part no. 8614293-1
BMW F07 LCI F10 F11 Expansion Coolant Reservoir Header Tank 7647285
Product currently unavailable
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Expansion tanks for optimal engine fluid level maintenance
Durable fluid expansion tanks for longevity
Expansion tanks are essential components of the engine cooling system that allow for monitoring coolant levels and ensuring proper circulation within the system. They help keep the cooling system sealed and maintain pressure and temperature at optimal levels, which prevents engine overheating. In the Global Parts automotive store, you will find a wide selection of used car parts, including expansion tanks perfectly matched to brands such as BMW, Audi, Mercedes, Volkswagen, Mini, and others.
What functions do expansion tanks perform?
Expansion tanks play a key role in a vehicle's cooling system:
- Coolant level regulation – They store excess coolant that expands due to temperature changes.
- Pressure stabilization – They help maintain the correct pressure in the cooling system, which increases its efficiency.
- Overheating prevention – Thanks to the circulation of coolant through the expansion tank, the cooling system operates efficiently under all conditions.
- Ease of fluid replenishment – Tanks are typically equipped with a visible level gauge, making it easy to check and top up the coolant.
Design and purpose of expansion tanks
Expansion tanks are closed cooling system components mounted in the engine bay, usually next to the radiator or near the wheel arch. Their task is to take in excess coolant during temperature rises and return it to the circuit after the engine cools down. A typical tank consists of a plastic body, connection ports, a pressure cap, and, depending on the version, a coolant level sensor socket. For parts such as a BMW expansion tank, it is worth comparing the OEM number, the layout of the ports, and the mounting type for the specific engine version.
Comparison of expansion tank variants
| Variant | Construction | Cooperating elements | What to check before purchase |
|---|---|---|---|
| Tank with pressure cap | Plastic body with thread or cap socket | Cap, return hoses, radiator | OEM number, thread tightness, condition of the filler neck |
| Tank with level sensor | Body with a sensor slot or integrated sensor | Electrical installation, indicators, wiring harness | Connector type, presence of sensor, compatibility with car equipment |
| Tank with separate ports of different diameters | Housing with multiple hose connection points | cooling system hoses and pipes, clamps, brackets | Port layout, connection diameters, mounting points |
Why is it worth taking care of expansion tanks?
Damage or malfunction of the expansion tank can lead to cooling system issues and serious engine failure. Typical symptoms of malfunction include:
- Coolant leaks – Visible spots under the vehicle may indicate cracks or leaks in the tank.
- Drop in fluid level – Frequent need to top up fluid may indicate sealing problems.
- Engine overheating – A damaged tank can disrupt coolant circulation.
- Cracks or mechanical damage – These can affect the tightness and functionality of the cooling system. If a replacement is needed, at Global Parts you will find suitable used car parts that will restore the full functionality of your cooling system.
The role of the cap and ports in cooling system operation
The expansion tank cap is the element responsible for maintaining the correct pressure in the circuit and safely discharging excess steam and fluid during high temperature increases. The expansion tank port refers to the connection to which the cooling system hose is attached and through which fluid flows between components. If you are looking for a part such as a BMW E46 expansion tank port, you should check the connection shape, hose diameter, and compatibility with the tank housing. In practice, it is also worth verifying the condition of cooperating temperature sensors and the tightness of connections at the hoses.
How to choose the right expansion tanks?
When choosing expansion tanks, you should pay attention to several key aspects:
- Vehicle model fitment – Every cooling system has its specific technical requirements. In the Global Parts automotive store, you will find expansion tanks perfectly matched to BMW, Audi, Mercedes, Volkswagen, Mini, and others.
- Technical condition – Used tanks should be free from cracks, mechanical damage, and signs of corrosion.
- Equipment – Ensure the tank is complete, e.g., it has a cap or an integrated level sensor.
Matching by OEM, engine version, and equipment
The selection of the tank should consider not only the car model but also the fuel type, engine version, mounting layout, and the presence of additional sensors. Product cards may contain data such as brand, fuel type, condition, OEM part number, and replacement numbers, which facilitate comparing the element before installation. When choosing an element like a BMW E46 coolant tank, it is important to check the position of the ports, the type of cap, and compatibility with adjacent components, such as water radiators or thermostats and cooling system housings.
Why choose used expansion tanks?
Used car parts, such as used expansion tanks, are an economical solution that allows for savings while maintaining high quality. By choosing used cooling system components, you gain:
- Lower costs – Used tanks are significantly cheaper than new ones but offer equally high quality.
- Ecology – Recycling parts supports environmental protection and reduces waste.
- Wide selection – In our store, you will find used expansion tanks for the most popular car brands.
Compatibility with other cooling system elements
The expansion tank serves to stabilize the operation of the entire cooling circuit, so its fitment should be evaluated together with other components. Not only the body and cap are important, but also the brackets, mounting points, and compatibility with the Engine cooling category. It is also worth comparing the condition of adjacent elements, especially if fans and fan housings were previously replaced. Additional material on the used parts market can be found in the article Crisis in the new parts market? Why used originals for premium cars (BMW, Mercedes, Porsche) are the hottest trend in 2026.
How to take care of expansion tanks?
To ensure expansion tanks operate reliably for a long time, it is worth following a few rules:
- Regular fluid level check – Check the coolant level in the tank before long trips.
- Tank cleaning – Regularly remove deposits and impurities that may accumulate in the tank.
- Avoid engine overheating – Ensure all cooling system components are functional to prevent excessive stress on the tank.
- Replace on time – Damaged or worn tanks should be replaced to avoid cooling system problems.
FAQ
| Question | Answer |
|---|---|
| What is the design and purpose of expansion tanks? | Expansion tanks are cooling system components mounted in the engine bay, connected to the coolant circuit. A typical element consists of a plastic body, connection ports, a pressure cap, and sometimes a level sensor. Their purpose is to take in excess fluid during temperature rises and maintain proper operating conditions for the entire system. |
| What are expansion tanks used for? | Expansion tanks are used to stabilize the level and volume of coolant during engine heating and cooling. Thanks to them, the cooling system can operate under the correct pressure, and the driver has easy access to check the fluid level. Damage to this element can lead to leaks, air in the circuit, and problems with maintaining engine operating temperature. |
| What role does the expansion tank pressure cap play? | The pressure cap is the part that closes the tank and controls the pressure in the cooling system. It serves to maintain the correct fluid operating parameters and to safely discharge excess pressure when the system temperature rises. Its design includes a seal and a valve, so when selecting, it is worth checking compatibility with the specific OEM number and tank neck type. |
| How to choose an expansion tank for a specific car? | The safest way is to compare the OEM part number, port layout, mounting points, and additional equipment, such as the presence of a level sensor. The engine version, fuel type, and mounting location in the engine bay are also important. For used parts, it is also worth verifying the condition of the cap thread and the tightness of the body. |
| What symptoms indicate a problem with the expansion tank? | The most common symptoms are a drop in coolant level, visible signs of leakage, cracks in the housing, and fogging or traces of sediment around the cap and ports. In some cars, a message related to the fluid level or unstable engine operating temperature also appears. These symptoms should be evaluated together with the condition of the hoses, cap, and adjacent connections. |
| What to pay attention to when installing an expansion tank? | Before installation, check the cleanliness of the hoses, the condition of the clamps, and the correct seating of the tank in the brackets. It is important to properly connect all ports and use the correct cap, as even a small leak affects the system pressure. After installation, it is worth checking the fluid level and observing the system operation after reaching operating temperature. |
Summary: expansion tanks at the Global Parts automotive store
Expansion tanks are essential cooling system components that support efficient engine operation and prevent overheating. In the Global Parts offer, you will find used parts for many brands, including BMW, Mercedes, Audi, and others, and when selecting, you can rely on the OEM number, replacement numbers, and compatibility with the car version and equipment. We invite you to contact us – we are here to help! For more information and interesting facts, we also invite you to visit our automotive blog.