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 B8 A5 8T A5 S5 Radiator Coolant Hose Tube Line Pipe 8K0121036E

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 05L122157CG

Audi A4 B9 A5 F5 Engine Cooling Coolant Pipe Line Hose 2.0 TDI 05L122157CG

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K1819371AB

Audi A4 B8 A5 8T Coolant Pipe Hose Line Heat Exchanger 1.8 TFSI 8K1819371AB

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0121049AG

Audi A6 C7 2.0 TDI CGLC Water Radiator Coolant Pipe Hose Tube Line 4G0121049AG

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 2Q0121407D

VW Polo Mk6 Audi A1 Mk2 GB Coolant Expansion Tank Reservoir Bootle 2Q0121407D

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6C0122157N

Audi A1 8X Engine Coolant Pipe Hose Tube Line 1.6 TDI Diesel CXMA 6C0122157N

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0121448BN

Audi A6 C7 A7 4G Coolant Hose Pipe Line 3.0 TDI CVUA 4G0121448BN

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0122101AJ

Water Hose Audi A6 C7 A7 4G Diesel Cooling Radiator Pipe Line 4G0122101AJ

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06K109121B

Audi A3 8V TT FV 2.0 TFSI Volkswagen Golf 7 Petrol Water Pump Cover 06K109121B

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 07K121029

Audi RSQ3 8U Engine Coolant Water Pump Pulley 2.5 TFSI 07K121029

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 3Q0121070R

VW Tiguan AD1 2.0 TDI Water Hose Cooling Radiator Coolant Pipe Line 3Q0121070R

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121102C

Audi A4 B8 A5 8T A6 C6 Coolant Hose Line Tube Pipe 3.0 TDI 059121102C

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0122056B

Audi A6 C7 A7 4G Coolant Hose Pipe Line 3.0 TDI CVUA 4G0121448BN

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121051H

Audi A5 F5 Engine Coolant Water Pipe Hose Line 3.0 TDI Diesel Engine 059121051H

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0121049CB

Audi A3 8P Water Coolant Pipe Hose Line Tube 1.2 TFSI 1K0121049CB

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7L8121157D

Audi Q7 4L Water Coolant Pipe Hose 3.0 TDI V6 Diesel CRC 7L8121157D

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0122073FS

Volkswagen Audi Seat Skoda Water Hose Radiator Coolant Pipe Line 1K0122073FS

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06E121083M

Audi S4 B8 S5 8T 3.0 TFSI CRE Supercharger Coolant Hose Pipe Line 06E121083M

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5N0122109AE

Audi Q3 8U Coolant Hose Radiator Cooling Water Pipe Line 5N0122109AE

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6C0122447K-1

Audi A1 8X VW Polo Mk5 Water Coolant Pipe Hose Line 1.4 TSI 6C0122447K

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 3Q0963231F

Volkswagen Golf MK7 Passat B8 Audi A6 C8 Water Coolant Heater Module 3Q0963231F

€85.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 03L121157AE-1

Audi A6 C7 Q5 8R Water Coolant Pipe Hose Tube 2.0 TDi 03L121157AE

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06K103495AF

Audi A1 S1 8X 2.0 TFSI Petrol Engine Oil Separator Breather 06K103495AF

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06H121026CC

Audi A3 8P A4 S4 B8 Water Pump Coolant Regulator Thermostat 1.8 TFSI 06H121026DC

€85.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0122109J

Audi S3 8V VW Volkswagen Golf 7 Water Coolant Pipe Hose Line Tube 5Q0122109J

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06Q145778D

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

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06E121044L

Audi S5 8T A4 S4 B8 A6 C7 Engine Water Coolant Pipe Hose Tube Line 06E121044L

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8J0121051P

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

€32.95

Free delivery: Sep 23 – 24

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06H121026BA

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

€94.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0122101CK

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06E121018E

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

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5N0122051BL

Audi Q3 8U Water Hose Cooling Radiator Coolant Pipe Line 5N0122051BL

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06L133054

Audi A3 8Y Quick Coupling Coolant Flange Air Intake Hose Line Petrol 06L133054

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0121087H

Audi TT 8J Coolant Flange Pipe Hose Line Tube 2.0 FSI Petrol 1K0121087H

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 045115389H-1

Audi A5 8T A3 8P A6 C6 A4 B8 Diesel Engine Oil Filter Housing Cooler 045115389H

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121075DK

Audi A8 D4 Coolant Cooling Hose Pipe Line Tube 059121075DK

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0965567-1

Additional Water Pump Audi A1 8X A3 8V Auxiliary Pump Coolant Unit 5Q0965567

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0121081BJ

Audi A4 B8 2.0 TDI Radiator Water Coolant Pipe Hose Tube Line 8K0121081BJ

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 079121071BN

Audi A5 S5 8T 4.2 V8 FSI Solid Coolant Pipe Water Hose Line 079121071BN

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 83A819371

Audi RSQ3 F3 Engine Cooling Coolant Hose Line Tube Pipe 83A819371

€70.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0121251K

Audi A4 B8 Coolant Radiator Engine Cooling Unit Radiator 8K0121251K

€80.95

Free delivery: Sep 22 – 24

If paid before 14:00

Part no. 6R0121051L

Audi A1 8X Seat Toledo KG Skoda Rapid NH Coolant Hose Pipe Line 6R0121051L

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 420121030A

Audi R8 42 Engine Coolant Pipe Water Hose Cooling Line Tube 420121030A

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0122445L

Audi A6 C7 A7 4G Coolant Cooling Pipe Hose Line Petrol Engine 4G0122445L

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04L121064F

Audi A1 8X Q3 8U Engine Coolant Hose Pipe Line Tube 1.6 TDi Diesel 04L121064F

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0122101CM-1

Audi A3 8V 35 TDI DFGA Water Coolant Hose Line Pipe Tube 5Q0122101CM

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059131425A

Audi Q5 8R Water Cooling Coolant Pipe Line Connector Bracket 059131425A

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8W0819332E

Audi A4 S4 B9 3.0 TFSI Water Hose Cooling Engine Coolant Pipe Line 8W0819332E

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121111N

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

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6C0122101AC-1

Audi A1 8X Engine Water Coolant Pipe Hose Line Tube 1.4 TSI CZCA 6C0122101AC

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 420121082B

Audi R8 42 Engine Coolant Pipe Water Hose Cooling Line Tube 420121082B

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8E0965559

Audi RS4 B7 Additional Water Pump Coolant Cooling Unit A8E0965559

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0122101CC-1

Audi A4 B7 Water Hose Cooling Coolant Radiator Pipe Line Tube 1K0122101CC

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 05L121011D-2

VW Volkswagen Golf CD1 Engine Coolant Water Pump DTSB 2.0 TDI Diesel 01Q220802RT

€165.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0121055N

Audi A4 B8 A5 8T 1.8 2.0 TFSI Petrol Engine Water Coolant Pipe Hose 8K0121055N

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0819334BC

Audi A4 B8 A5 8T Water Coolant Hose Line Pipe 3.0 TFSI Petrol 8K0819334BC

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0121058R

Audi VW Seat Skoda Water Hose Cooling Radiator Coolant Pipe Line 5Q0121058R

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121075ES

Audi A6 C7 A7 4G Q7 4M Engine Coolant Water Pipe 3.0 TDI 059121075ES

€99.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06E121083G

Audi S4 B8 S5 8T Water Hose Coolant Pipe Line Tube 3.0 TFSI 06E121083G

€118.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8J0121109A

Audi TT 8J 2.0 TFSI Water Hose Cooling Coolant Radiator Pipe Line 8J0121109A

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0965567B

Audi A6 C8 Water Electric Pump Auxiliary Coolant Circulation 8K0965567B

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121071CK

Audi Q7 4L 3.0 TDI Diesel Coolant Water Pipe Hose Line 059121071CK

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0121205AB

Audi TT 8J Engine Cooling Radiator Fan Shroud Coolant Panel 1K0121205AQ

€32.95

Free delivery: Sep 22 – 24

If paid before 14:00

Part no. 3C0121447L

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

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06K121075BF

Engine Coolant Pipe Audi A3 S3 8V 2.0 TFSI Water Cooling Hose Line 06K121075BF

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121054C

Audi A8 D4 3.0 TDI Diesel Coolant Water Hose Line Tube Pipe Engine 059121054C

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121511CT

Audi Q7 4M Q8 Mk2 Water Coolant Hose Line Tube Pipe 3.0 Diesel 059121511CT

€80.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0121109AK

Audi A3 8P Water Cooling Coolant Pipe Hose Line Petrol Engine 1K0121109AK

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6C0121070G

Audi A1 8X Engine Coolant Water Pipe Hose Tube Line 1.6 TDI Diesel 6C0121070G

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0121205R

Audi S1 8X S3 8V Engine Cooling Radiator Fan Shroud Motor 2.0 TFSI 5Q0121205R

€431.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0819263B

Audi A4 B8 Auxiliary Water Pump Bracket Holder 8K0819263B

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0122051GL

Audi S3 8P VW Golf VI Water Coolant Hose Radiator Pipe Line 2.0 TFSI 1K0122051GL

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121008K

Water Pump Audi A5 8T A6 C7 A8 D4 3.0 TDI Coolant Circulation Unit 059121008K

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06K121085M

Audi VW Seat 2.0 TFSI Petrol Water Pipe Engine Coolant Hose Line 06K121085M

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4H0819334L

Audi A8 D4 3.0 TDI Heater Hose Cooling Coolant Radiator Pipe Line 4H0819334L

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121512AE

Audi A6 C7 A7 4G Engine Coolant Water Pipe Line 3.0 TDI Diesel 059121512AE

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121005TX-1

Audi A7 4G Water Pump Coolant Circulation Cooling Unit 059121005TX

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7L0965561L

Audi A4 B7 2.0 TDI Quattro Auxiliary Additional Water Pump 7L0965561L

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0819332J

Audi A5 8F 2.0 TDI Water Hose Cooling Radiator Coolant Pipe Line 8K0819332J

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5N0121109F

Audi Q3 8U Engine Water Coolant Pipe Hose Line 1.4 TFSI 5N0121109F

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 079121070CK

Coolant Pipe Audi A6 C7 S7 4G 4.0 TFSI Water Hose Line 079121070CK

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 03L121132AA

Audi A3 8P TT 8J VW Golf Mk6 Coolant Flange Temperature Sensor 03L121132AA

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8W0121400B

Audi A4 B9 Oil Coolant Hose Pipe Line Tube 8W0121400B

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0121207A-3

Audi A4 B8 Diesel Engine Cooling Radiator Double Coolant Fan Motor 8K0121207A

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121008M

Audi A4 B9 A6 C7 Water Pump Coolant Circulation Unit 3.0 TDI CSWB 059121008M

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0121064AG

Audi A3 8V Engine Water Coolant Pipe Hose Line 2.0 TDI 5Q0121064AG

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0121070BQ-1

Audi S3 8V Water Hose Engine Coolant Cooling Pipe Line Tube 5Q0121070BQ

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04L121011E

Audi A4 B8 2.0 TDI CNHC Electric Water Pump 04L121011E

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0122109A

Audi A7 4G Water Cooling Coolant Hose Pipe Front Left N/S 3.0 TDI 4G0122109A

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0121070BC

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8E0121109Q

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 3C0122101EN

Audi A3 8P 2.0 TDI Water Hose Radiator Coolant Pipe Line 3C0122101EN

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0122073GE

Audi A3 8P VW Golf Mk6 Water Hose Cooling Coolant Radiator Pipe Line 1K0122073GE

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4K0145920S

Audi A6 C8 Coolant Water Pipe Hose Line 50 TFSIe 4K0145920S

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0121405F

Audi A4 S4 8K A5 S5 8F 8T Radiator Expansion Tank Coolant Reservoir 8K0121405F

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 07K965561

Audi A3 RS3 8V Auxiliary Additional Electric Water Pump Unit 07K965561

€85.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4H0121403G

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

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4K0121051L

Audi A6 C8 Water Coolant Pipe Hose Line 50 TFSIe 4K0121051L

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

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