What is the construction and purpose of engine cooling?

Engine cooling is a set of parts responsible for maintaining the proper operating temperature of the powertrain. A typical system consists of a radiator, water pump, thermostat, hoses, fan, sensors, and an expansion tank. These elements are located mainly in the engine compartment and connected by a coolant circuit.

What is engine cooling used for?

Engine cooling is used to absorb excess heat from the block and cylinder head and to stabilize the operating temperature during driving and when stationary. An efficient system limits the risk of overheating and also affects the proper operation of the heater, fan, and control sensors. Without proper cooling, engine performance may drop, and cooperating components may fail.

What role does the expansion tank play in the cooling system?

The expansion tank is a cooling system element that absorbs fluid volume changes resulting from temperature increases and decreases. It is used to maintain the correct fluid level and works with a pressure cap that stabilizes the system's operating conditions. Fluid levels and the condition of return hoses are often checked within its vicinity.

How to choose a cooling system part for a specific car version?

It is safest to compare the OEM number, engine version, body type, and mounting location. It is also worth checking the number of pins in the plug, pipe diameter, mounting type, and the presence of additional sensors. For parts such as a fan or auxiliary pump, the control method also matters.

What symptoms indicate cooling system problems?

Typical symptoms include rising engine temperature, fluid leaks, the fan not turning on, steam from under the hood, or the unit taking too long to warm up. In some cars, temperature sensor errors or weaker interior heating also appear. Symptoms should be analyzed in conjunction with the operation of the thermostat, water pump, and hose tightness.

What to pay attention to when installing engine cooling parts?

After installation, you must check the tightness of connections, correct seating of mounts, and the condition of seals. It is also important to top up with the correct fluid and bleed the system according to the manufacturer's procedure. In the case of electrical parts, you should additionally verify the plugs, wiring harness, and fan control operation.

Engine cooling

At the Global Parts automotive store, we offer a wide selection of original used car parts, including engine cooling components, for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. Each of our car parts undergoes quality control to ensure you receive a top-quality product.

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Audi A4 B9 Auxiliary Water Pump Coolant Circulation Unit Bracket 8W2819263

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 80A122055CH-1

Audi Q5 FY Engine Coolant Pipe Hose Line 40 TDI 80A122055CH

£28.95

Free delivery: Oct 22

If paid before 14:00

Part no. 06F121132G

Audi S3 8P 2.0 TFSI CDLA Coolant Flange Pipe Hose Line 06F121132G

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 80A121400B-1

Audi Q5 FY Water Hose Cooling Coolant Radiator Pipe Line 40 TDI 80A121400B

£32.95

Free delivery: Oct 22

If paid before 14:00

Part no. 5N0121070M

Audi A3 8P Water Hose Cooling Radiator Coolant Pipe Line 5N0121070M

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 8W0122291AB

Audi A4 B9 35 TFSI DMSB Petrol Water Coolant Hose Line Tube Pipe 8W0122291AB

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 8K0121049AF

Audi A4 B8 2.0 TDI Water Coolant Hose Tube Line Pipe 8K0121049AF

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 4K0121140B

Audi A6 C8 Engine Water Coolant Cooling Pipe Hose Line 50 TFSIe 4K0121140B

£23.95

Free delivery: Oct 22

If paid before 14:00

Part no. 05L122157AS

Audi A4 B9 A5 F5 Water Cooling Coolant Pipe Hose Line 2.0 TDI 05L122157AS

£23.95

Free delivery: Oct 22

If paid before 14:00

Part no. 079121678K

Audi S6 C7 S7 4G Engine Coolant Thermostat Resonator Valve 4.0 TFSI 079121678K

£123.95

Part no. 06E121044M

Audi A6 C7 A4 B8 A7 4G A8 D3 Coolant Hose Line Tube Pipe 06E121044M

£23.95

Free delivery: Oct 22

If paid before 14:00

Part no. 4G0317818AF

Audi RS6 C7 Oil Pipe Line Tube Hose Automatic Gearbox Transmission 4G0317818AF

£28.95

Free delivery: Oct 22

If paid before 14:00

Part no. 6R0122101DJ

Audi A1 S1 8X 2.0 TFSI Petrol Water Coolant Pipe Hose Line 6R0122101DJ

£28.95

Free delivery: Oct 22

If paid before 14:00

Part no. 4H0121207C-1

Audi S6 C7 S7 4G Engine Cooling Radiator Fan 4.0 TFSI 4H0121207C

£246.95

Free delivery: Oct 22

If paid before 14:00

Part no. 8W0819342L-1

Audi A5 F5 Water Return Coolant Pipe Hose Flow Line 8W0819342L

£28.95

Free delivery: Oct 23 – 30

If paid before 14:00

Part no. 8W0145925P

Audi A4 B9 A5 F5 Water Coolant Pipe Hose 2.0 TDI 8W0145925P

£28.95

Free delivery: Oct 22

If paid before 14:00

Part no. 04L121070AB

Audi Q3 8U 2.0 TDI DFUA Diesel Water Coolant Hose Pipe Tube Line 04L121070AB

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 06Q145778D

Audi S3 8Y 2.0 TFSI Turbocharger Oil Feed Pipe Hose Line 06Q145778D

£37.95

Free delivery: Oct 22

If paid before 14:00

Part no. 8W0145920M

Audi A5 F5 Water Hose Cooling Radiator Coolant Pipe Line 2.0 TDI 8W0145920M

£37.95

Free delivery: Oct 22

If paid before 14:00

Part no. 06H121026BA

Audi A4 B8 Water Pump 2.0 TFSI Petrol Engine Coolant Unit 06H121026BA

£75.95

Free delivery: Oct 22

If paid before 14:00

Part no. 1K0121207AD

Audi A3 8P TT 8J Engine Coolant Radiator Shroud Fans 1K0121207AD

£56.95

Free delivery: Oct 22

If paid before 14:00

Part no. 06H906517Q

Audi A3 8V 2.0 TFSI CZPB Oil Separator Breather Valve 06H906517Q

£23.95

Free delivery: Oct 22

If paid before 14:00

Part no. 04E121070L

Volkswagen Audi Seat Skoda Engine Plastic Water Coolant Pipe Hose 04E121070L

£18.95

Free delivery: Oct 22

If paid before 14:00

Part no. 059121511BT

Audi A4 S4 B9 A5 S5 F5 Water Coolant Hose Line Tube Pipe 3.0 Diesel 059121511BT

£37.95

Free delivery: Oct 22

If paid before 14:00

Part no. 5Q0122101CK

Audi A3 8V 1.6 Diesel Engine Coolant Hose Line Tube Pipe Right O/S 5Q0122101CK

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 059145771AC

Audi A5 8T 3.0 TDI CCWA Turbo Oil Feed Pipe Line Hose Tube 059145771AC

£18.95

Free delivery: Oct 22

If paid before 14:00

Part no. 059121008J

Audi A5 8T 3.0 TDI CDUC Coolant Water Pump 059121008J

£28.95

Free delivery: Oct 22

If paid before 14:00

Part no. 03G906088AT

Audi A3 8P Exhaust Gas Temperature Sensor 03G906088AT

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 6R0121070L

Audi A1 8X 1.4 TSI Petrol Engine Water Hose Coolant Pipe Line 6R0121070L

£23.95

Free delivery: Oct 22

If paid before 14:00

Part no. RHD-8K2819350AD

Audi A4 B8 A5 8T Heater Coolant Hoses Pipes Water Line 2.0 TDI 8K2819350AD

£18.95

Free delivery: Oct 22

If paid before 14:00

Part no. 7L0959455F

Audi Q7 4L Radiator Fan Engine Motor Cooling Fan 7L0959455F

£42.95

Free delivery: Oct 22

If paid before 14:00

Part no. 05L919501B

Audi A4 B9 Q5 FY A6 C8 A7 C8 Water Coolant Temperature Sensor 2.0 TDI 05L919501B

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 8K0819337A

Audi A4 B7 2.0 TDI BRE Diesel Water Coolant Pipe Hose Line Tube 8K0819337A

£23.95

Free delivery: Oct 22

If paid before 14:00

Part no. 1K0122101CK

Audi Q3 8U Water Hose Cooling Radiator Coolant Pipe Line 1K0122101CK

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 059121111N

Audi Q7 4L Diesel Engine Thermostat Housing 3.0 TDI 059121111N

£18.95

Free delivery: Oct 22

If paid before 14:00

Part no. 4H0121403G

Audi A8L 4H 3.0 TDI CDTA Coolant Overflow Reservoir Expansion Tank 4H0121403G

£23.95

Free delivery: Oct 22

If paid before 14:00

Part no. 06E121018E

Audi A6 C7 A7 4G A8 D3 Petrol Engine Cooling Fluid Coolant Pump 06E121016

£23.95

Free delivery: Oct 22

If paid before 14:00

Part no. RHD-4G2819350AC

Audi A6 C7 A7 4G Water Pipe Hose Engine Coolant Cooling Line 3.0 TDI 4G2819350AC

£28.95

Free delivery: Oct 22

If paid before 14:00

Part no. 4G0122101G

Audi A6 C7 2.0 TDI CGLC Water Coolant Hose Line Tube Pipe 4G0122101G

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 8W0959455B

Audi A5 F5 Radiator Fan Engine Cooling Fan Motor Blades 400W 8W0959455B

£189.95

Free delivery: Oct 22

If paid before 14:00

Part no. 8W0145924P

Audi A4 B9 Water Hose Cooling Radiator Coolant Pipe Line 8W0145924P

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 4F0121003P

Audi A6 C6 2.0 TDI CAHA Diesel Diffuser Radiator Fan Shroud 4F0121003P

£127.95

Free delivery: Oct 23 – 30

If paid before 14:00

Part no. 8W0906088F

Audi A4 B9 2.0 TDI DETA Diesel Exhaust Gas Temperature Sensor 8W0906088F

£18.95

Free delivery: Oct 22

If paid before 14:00

Part no. 4K0122061Q

Audi A6 C8 High Voltage Battery Cooling Hose Tube 50 55 TFSIe 4K0122061Q

£75.95

Free delivery: Oct 22

If paid before 14:00

Part no. 04E103474G

Audi A3 8V Tank Crankcase Breather Vent Pipe Line 04E103474G

£18.95

Free delivery: Oct 22

If paid before 14:00

Part no. 8K0819263B

Audi A4 B8 Auxiliary Water Pump Bracket Holder 8K0819263B

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 06L121075B

Audi A4 B8 A5 8T A6 C7 Water Coolant Pipe Hose Line 1.8 2.0 TFSI 06L121075B

£23.95

Free delivery: Oct 22

If paid before 14:00

Part no. 4G0122109

Audi A7 4G Water Cooling Coolant Hose Pipe Line Rear Left N/S 4G0122109

£18.95

Free delivery: Oct 22

If paid before 14:00

Part no. 5Q0121070BC

Audi Q3 8U Water Hose Engine Coolant Cooling Pipe Line 2.0 TDI 5Q0121070BC

£18.95

Free delivery: Oct 22

If paid before 14:00

Part no. 8E0121109Q

Audi A4 B7 Water Pipe Engine Cooling Radiator Coolant Hose 3.2 Petrol 8E0121109Q

£18.95

Free delivery: Oct 22

If paid before 14:00

Part no. 03C121070M

Audi A1 8X Water Pipe Hose Line Engine Cooling Coolant Unit Hose 03C121070M

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 8J0121051P

Audi TT 8J Engine Water Coolant Pipe Hose Line 2.0 TDI Diesel Engine 8J0121051P

£28.95

Free delivery: Oct 22

If paid before 14:00

Part no. 4G0819374L

Audi A6 C7 A7 4G Coolant Hose Pipe Line 3.0 TDI CVUA 4G0819374L

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 3C0121447L

Audi A3 8P VW Passat 3C Touran 1T Coolant Hose Pipe Line Tube 3C0121447L

£47.95

Free delivery: Oct 22

If paid before 14:00

Part no. 8E0121205AB

Audi A4 B7 Radiator Cooling Fan Control Unit 2.0 TFSI Petrol8E0121205AB

£37.95

Free delivery: Oct 22

If paid before 14:00

Part no. 1K0122096J

Seat Leon II VW Golf MK5 Audi A3 8P Water Hose Coolant Pipe Petrol 1K0122096J

£18.95

Free delivery: Oct 22

If paid before 14:00

Part no. 8R0121055H-1

Audi Q5 8R Water Cooling Pipe Coolant Hose Tube Line 8R0121055H 4F0122293A

£23.95

Free delivery: Oct 22

If paid before 14:00

Part no. 4G0121447CA

Audi A6 C7 A7 4GA Engine Water Coolant Pipe Hose Line Petrol 4G0121447CA

£18.95

Free delivery: Oct 22

If paid before 14:00

Part no. rhd-4F2819374

Audi A6 C6 Water Hose Radiator Coolant Cooling Tube Pipe Line 4F2819374

£18.95

Free delivery: Oct 22

If paid before 14:00

Part no. 4G0819377K

Audi A6 A7 C7 3.0 TDI Coolant Water Hose Pipe Line Tube 4G0819377K

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 5G0965561

Audi A3 8V 1.4 TFSI CXSA Additional Auxiliary Water Pump 5G0965561

£23.95

Free delivery: Oct 22

If paid before 14:00

Part no. 4G0122293CR

Audi A6 C7 Water Coolant Pipe Hose Line Tube 2.0 TDI Diesel Engine 4G0122293CR

£66.95

Free delivery: Oct 22

If paid before 14:00

Part no. 8W0959455AD

Audi A6 C8 Engine Cooling Radiator Fan Shroud Motor Unit 8W0959455K

£89.95

Free delivery: Oct 22

If paid before 14:00

Part no. 7L8121065D-1

Audi Q7 4L Engine Coolant Hose Line Tube Pipe 3.0 TDI Diesel 7L8121065D

£23.95

Free delivery: Oct 22

If paid before 14:00

Part no. 8K0819342J

Audi A5 8T 2.0 TDI Coolant Water Hose Line Cooling Tube Pipe 8K0819342J

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 06K103495AS

Audi A4 B9 A5 F5 Engine Oil Separator Breather Petrol 2.0 TFSI DDWA 06K103495AS

£28.95

Free delivery: Oct 22

If paid before 14:00

Part no. 3AA122157

Audi TT 8J Volkswagen Passat Water Coolant Hose Pipe Line 3AA122157

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 03L121071

Audi A4 B8 A5 8T A6 C6 Water Coolant Cooling Pipe Hose Line 2.0 TDI 03L121071

£13.95

Free delivery: Oct 22

If paid before 14:00

Part no. 4G0121049Q

Audi A6 C7 A7 4G Water Radiator Coolant Pipe Hose Tube Line 3.0 TFSI 4G0121049Q

£23.95

Free delivery: Oct 22

If paid before 14:00

Part no. 5Q0965561B

Audi A3 8V 2.0 TDI Auxiliary Water Pump 5Q0965561B

Product currently unavailable

Part no. 059121012A

Audi A6 C7 Additional Auxiliary Water Coolant Pump 059121012A

Product currently unavailable

Part no. 1K0121207BB

Audi A3 8P 1.9 TDI BLS Diesel Radiator Fan Cowling Assembly Shroud 1K0121207BB

Product currently unavailable

Part no. 7L0121407F

Audi Q7 4L Radiator Expansion Overflow Reservoir Tank Bottle 7L0121407F

Product currently unavailable

Part no. rhd-4F2959617B

Audi A6 C6 Auxiliary Water Pump Electric Coolant Unit Valve 4F2959617B

Product currently unavailable

Part no. 7L0965561J

Audi Q7 4L Additional Auxiliary Water Coolant Pump 7L0965561J

Product currently unavailable

Part no. 8K0121405N

Audi A5 S5 8T Expansion Tank Header Coolant Reservoir Bottle 8K0121405N

Product currently unavailable

Part no. 5Q0121251HA

Audi A3 S3 8V Engine Cooling Radiator Coolant Unit Petrol 5Q0121251HA

Product currently unavailable

Part no. 04L121065CR

Water Hose Audi A3 8V Skoda Octavia IV 1.6 TDI Coolant Line Pipe 04L121065CR

Product currently unavailable

Part no. 059121031H-1

Water Pump Wheel Audi Q5 8R A7 4G8 3.0 TDI Diesel Coolant Pump Pulley 059121031H

Product currently unavailable

Part no. 04L906051C

Audi A5 8T Exhaust Gas Pressure Sensor Unit 2.0 TDI CNHA Diesel 04L131552DP

Product currently unavailable

Part no. 5Q0121407D

Audi A3 8V Expansion Tank Header Coolant Reservoir Bottle 5Q0121407D

Product currently unavailable

Part no. 8K0121403T

Audi A4 B8 A5 8T Expansion Tank Header Coolant Reservoir Bottle 8K0121403AC

Product currently unavailable

Part no. 06F129101R

Audi A3 8P TT 8J VW Golf GTI 2.0 TFSI Breather Valve Oil Separator 06F129101R

Product currently unavailable

Part no. 5Q0816743D

Audi A3 8V VW Golf Mk7 Air Conditioning Hose A/C Pipe Line 5Q0816743D

Product currently unavailable

Part no. 5Q0906457K

Audi Seat Skoda Volkswagen Auxiliary Water Pump Valve Coolant 5Q0906457K

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Part no. 5Q0121070AB

Audi VW Seat Petrol Coolant Hose Water Pump Pipe Cooling Line 5Q0121070AB

Product currently unavailable

Part no. 4M0121321Q

Audi Q7 4M Water Coolant Expansion Tank Cover Cap 4M0121321Q

Product currently unavailable

Part no. 4G0121403G

Audi A6 C7 Expansion Overflow Coolant Reservoir Bottle Tank 4G0121403G

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Part no. 4H0965567A

Audi Q5 8R Water Coolant Pump Engine Cooling 4H0965567A

Product currently unavailable

Part no. 8W0121405L

Audi A4 B9 Expansion Tank Engine Coolant Fluid Bottle Reservoir 8W0121405L

Product currently unavailable

Part no. RHD-8W2121405H

Audi A5 S5 Expansion Coolant Tank Overflow Bottle 8W2121405H

Product currently unavailable

Part no. 1K0122063J

Audi TT 8J A3 8P Skoda Octavia II 2.0 TFSI Water Coolant Pipe Hose 1K0122063J

Product currently unavailable

Part no. 1K0122109BB

Audi A3 8P Coolant Reservoir Expansion Overflow Line Pipe Hose Tube 1K0122109BB

Product currently unavailable

Part no. 5Q0121407M

Audi A3 8V Expansion Header Overflow Coolant Bottle Tank Reservoir 5Q0121407M

Product currently unavailable

Part no. 8K0805201-1

Audi Q5 8R Coolant Mounting Radiator Holder Bracket Set 8K0805201

Product currently unavailable

Part no. 5Q0122051EG

Audi A3 8V Water Coolant Pipe Radiator Hose Cooling Fluid Line 5Q0122051EG

Product currently unavailable

Part no. 1K0121207T-1

Audi A3 8P Engine Cooling Radiator Fan Twin Ring Shroud Petrol 1K0121207T

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Part no. 8K0121003P

Audi A4 B8 Q5 8R Engine Cooling Radiator Fan Shroud Coolant Panel 8K0121003P

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Part no. 8E0121403F

Audi S4 B6 Coolant Expansion Tank 8E0121403F

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