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

€56.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 059131425A

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

€28.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 059121111N

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

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0121049K

Audi A3 8V Radiator Coolant Hose Pipe Tube Line 1.4 TFSI 5Q0121049K

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 420121082B

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

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5N0122101Q

Audi Q3 8U Engine Coolant Hose Tube Line Pipe 2.0 TFSI CZCZ Petrol 5N0122101Q

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8E0965559

Audi RS4 B7 Additional Water Pump Coolant Cooling Unit A8E0965559

€37.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 5Q0121058R

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8K0965567B

Audi A6 C8 Water Electric Pump Auxiliary Coolant Circulation 8K0965567B

€113.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8K0121251H

Audi A7 4G Diesel Radiator Engine Water Coolant Unit Cooler 8K0121251H

€85.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. 1K0121205AB

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

€32.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. 3C0121447L

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

€51.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 1K0121109AK

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8K0819263B

Audi A4 B8 Auxiliary Water Pump Bracket Holder 8K0819263B

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 4G0819350S

Audi A6 C7 Engine Water Coolant Pipe Hose Tube Line 2.0 TDI Diesel 4G0819350S

€28.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 06E121045AA

Audi A4 S4 B8 S5 8T A6 C7 Engine Coolant Hose Tube Line Pipe 06E121045AA

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 059121005TX-1

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

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7L0965561L

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8W0121400B

Audi A4 B9 Oil Coolant Hose Pipe Line Tube 8W0121400B

€32.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 1K0122447HB

Audi A3 8P Water Coolant Pipe Hose Line 1.4 TFSI CAXC 1K0122447HB

€37.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 04L121011E

Audi A4 B8 2.0 TDI CNHC Electric Water Pump 04L121011E

€28.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 4H0959455AB-2

Audi A8 D4 Radiator Fan Shroud Engine Cooling Motor Unit 4H0959455AB

€237.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06E121498A

Audi A8 D3 Engine Coolant Pipe Hose Line 3.2 FSI BPK 06E121498A

€42.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 4K0145920S

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 07K965561

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

€85.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 4K0121051L

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 079121065M

Audi A4 B6 4.2 Petrol Coolant Pipe Cooler Water Hose 079121065M

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4H0959455AC

Audi A8 D4 Motor Radiator Fan Engine Cooling Motor 400W 4H0959455AC

€284.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122109AS

Audi A3 8P Engine Water Coolant Pipe Hose Line 1.4 TFSI CAXC Petrol 1K0122109AS

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K0145919P

Audi A6 C8 Expansion Tank Water Coolant Pipe Hose Line 50 TFSIe 4K0145919P

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122096J

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0819376E

Audi A4 B9 A5 F5 Water Hose Cooling Coolant Pipe Line 3.0 TFSI Petrol 8W0819376E

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06J121497J

Audi TT 8J Turbine Lubrication Inlet Oil Feed Line Pipe 06J121497J

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K1819376J

Audi A5 8T 2.0 TFSI Water Hose Cooling Coolant Radiator Pipe Line 8K1819376J

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8R0121081AQ

Audi Q5 8R Expansion Coolant Radiator Hose Pipe Tube Line Cooling 8R0121081AQ

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 059121131J

Audi A8 D4 Q7 4L Coolant Hose Line Tube Pipe 3.0 TDI 059121102C 059121053J

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K0145934L

Audi A6 C8 Water Coolant Pipe Hose Line 50 TFSIe 4K0145934L

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 079121083H

Audi A7 4G 4.0 TFSI Coolant Hose Engine Water Pipe Front Left N/S 079121083H

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06E121111M

Audi A4 B7 B8 A6 C6 Petrol Engine Water Coolant Thermostat Housing 06E121111M

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G0819377K

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122051AE

Audi A4 B7 Water Hose Cooling Coolant Radiator Pipe Line 1K0122051AE

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G0819374R

Audi A6 Allroad A7 4G8 Sportback Heater Coolant Hose Pipe Line Tube 4G0819374R

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0122101H

Audi A3 8V Water Coolant Hose Line Pipe Tube 1.4 TFSI Petrol CMBA 5Q0122101H

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 059121454C

Audi A4 B8 A6 C7 A8 D4 A7 4K Radiator Coolant Hose Pipe Line 3.0 TDI 059121454C

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K0819374AC

Audi A6 C8 Engine Water Coolant Pipe Hose Cooling Line Tube 50 TFSIe 4K0819374AC

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06K121065Q

Audi TT FV Water Coolant Pipe Hose Line 06K121065Q

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8R0121049P

Audi Q5 8R Water Coolant Pipe Hose Line Connector 2.0 TDI 8R0121049P

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6C0122447K

Audi A1 8X Polo 6C Water Coolant Hose Pipe 1.4 TSI TFSI 6C0122447K

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0122073L

Audi A3 8V Engine Water Coolant Pipe Tube Line Hose 1.4 TFSI Petrol 5Q0122073L

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8V0121073

Audi RS3 8V Water Pipe Hose Line Engine Cooling Coolant Unit Hose 8V0121073

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 059131056R

Audi A4 B8 A7 4G8 A6 4G C7 Q7 4L 3.0 TDi V6 EGR Vacuum Hose Pipe Line 059131056R

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0121081BH

Audi A4 B8 A5 8T Coolant Breather Hose Pipe Line 1.8 TFSI Petrol 8K0121081BH

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06H121601N

Audi A4 B9 A5 8T Additional Water Pump Engine Coolant Unit 06H121601N

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G0121214AC

Audi A6 A7 4G8 Radiator Coolant Reservoir Bracket Mount Upper Front 4G0121214AC

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G0121214AF

Audi A6 C7 Radiator Coolant Reservoir Bracket Mount Lower Front 4G0121214AF

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5N0122447BD

Audi Q3 8U Water Coolant Cooling Pipe Hose Line 2.0 TDI Diesel 5N0122447BD

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 07K965561B-1

Audi RS Q3 8U Engine Auxiliary Water Coolant Pump 2.5 TFSI 07K965561B

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0819377AA

Audi A5 8T Water Hose Cooling Radiator Coolant Pipe Line 8K0819377AA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G0121214AE

Audi A6 C7 Radiator Coolant Reservoir Bracket Mount Upper Front 4G0121214AC

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0122157AT

Audi A3 8V VW Golf 5G Engine Water Coolant Tube Pipe 1.4 TFSI Petrol 5Q0122157AT

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7H0819617

Audi Q7 4L Webasto Auxiliary Water Heater Air Filter Unit Pipe 7H0819617

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06L133583G

Audi A4 B9 Water Coolant Pipe Hose Line 2.0 TFSI Petrol 06L133583G

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G0816743AP

Audi S6 C7 A7 Refrigerant Hose Pipe Line 4G0816743AP

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8R0121284H

Audi Q5 8R Cooling Radiator Guide Mount Bracket Right O/S 8R0121284H

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06K103495AS

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

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

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