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

€80.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0121109AK

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0819263B

Audi A4 B8 Auxiliary Water Pump Bracket Holder 8K0819263B

€23.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 4G0145919J

Audi A6 C7 A7 S7 4G Water Pipe Hose Engine Cooling Coolant Unit Line 4G0145919J

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 059121005TX-1

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

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7L0965561L

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

€23.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 8W0121400B

Audi A4 B9 Oil Coolant Hose Pipe Line Tube 8W0121400B

€32.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 04L121011E

Audi A4 B8 2.0 TDI CNHC Electric Water Pump 04L121011E

€28.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 4K0145920S

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

€23.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 07K965561

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

€85.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 4K0121051L

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 079121065M

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

€47.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 06J121497J

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

€23.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 4K0145934L

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

€23.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 1K0122051AE

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

€23.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 06K121065Q

Audi TT FV Water Coolant Pipe Hose Line 06K121065Q

€23.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 8K0121405R

Audi S5 8T Cooler Coolant Expansion Tank Reservoir 8K0121405R

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06H121601N

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0121214AC

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8E0121044N

Audi A4 S Line Radiator Coolant Hose Line Pipe Tube Water Cooler 8E0121044N

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0121214AF

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04E122157H

Turbocharger Cooling Line VW Golf MK7 Audi A3 8V 1.4 TSI Water Pipe 04E122157H

€23.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 1K0122101CC

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0121214AE

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7H0819617

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0816743AP

Audi S6 C7 A7 Refrigerant Hose Pipe Line 4G0816743AP

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8R0121284H

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

€23.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 8K0819350D

Audi A4 B8 A5 8T Coolant Cooling Hose Pipe Line Tube 2.0 TDI 8K0819350D

€23.95

Free delivery: Aug 10 – 11

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7L8121058

Audi Q7 4L 4.2 TDI Coolant Hose Radiator Pipe Water Cooling Line 7L8121058

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0906088

Audi A5 8T 3.0 TDI CLAB Diesel Temperature Exhaust Gas Sensor A8K0906088

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0819374M

Audi A6 C7 A7 4G Heater Coolant Cooling Hose Pipe Line 4G0819374M

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0816721AB

Audi A3 8V Water Hose Radiator Coolant Refrigerant Line 1.6 Diesel 5Q0816721AB

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0959455AD-2

Audi RS4 B8 A6 C7 A7 4G Radiator Fan Engine Cooling Motor Left N/S 4H0959455AD

€80.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5G0965561

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

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G1819350AT

Audi A6 C7 A7 4G Heater Coolant Cooling Hose Pipe Line 4G1819350AT

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L121444F

VW Tiguan 5N Engine Coolant Hose Line Tube Pipe 2.0 TDI Diesel 04L121444F

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0133366BB

Audi A3 8P A4 B7 Golf Mk6 Water Coolant Pipe Hose Line 2.0 TSI 1K0133366BB

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8J0121447E

Audi TT 8J Engine Coolant Vent Hose Pipe 2.0 TDI Diesel CBBB 8J0121447E

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0816743D

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

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 059121598AB

Audi A8 D4 Engine Water Coolant Pipe Hose Line Feed 3.0 TDI 059121598AB

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8N0422891E

Audi TT 8N Power Steering Rack Return Oil Hose Pipe Line 3.2 Quattro 8N0422891E

€85.95

Free delivery: Aug 7 – 11

If paid before 14:00

Part no. 8W0122291AK

Audi A4 B9 35 TFSI DMSB Petrol Water Coolant Hose Line Tube Pipe 8W0122291AK

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0317823B

Oil Pipe Audi A4 B8 A5 8T Diesel Gearbox Cooler Line 8K0317823B

€75.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 059121111L

Audi A4 B7 2.7 TDI BPP Diesel Engine Thermostat Housing 059121111L

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06L145735J

Audi A4 B8 A5 F5 Turbine Lubrication Oil Return Pipe 2.0 TFSI 06L145735J

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8J0121124A

Audi RS3 8P Gearbox Oil Cooler Coolant Pipe Hose Line 2.5 TFSI CEPA 8J0121124A

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0819337

Audi A6 C7 3.0 TFSI Water Coolant Pipe Hose Line 4G0819337

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0121203G

Audi A3 8V Radiator Fan Engine Cooling Cooler Blower Unit 5Q0121203G

€75.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 059121507M

Audi A4 S4 8K A5 S5 8T Engine Coolant Pipe Hose Tube Line 059121507M

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 059121465B-1

Audi A4 B8 A5 8T A6 C7 Q7 4L Coolant Pipe Water Hose 3.0 TDI 059121465B

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0121405F

Audi A5 F5 Expansion Coolant Tank Bottle 8W0121405F

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06H121497F

Audi A4 B8 A5 8T Turbocharger Coolant Feed Pipe Hose Line 1.8 TFSI 06H121497F

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06F121057C

Audi A1 8X S3 8P VW Golf R Mk5 Water Coolant Pipe Hose Line 2.0 TSI 06F121057C

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5WA907527A

Audi A3 8Y Volkswagen VW Golf Mk8 Interior Temperature Sensor Unit 5WA907527A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1J0121403B

Audi TT 8N Coolant Expansion Header Tank Bottle Reservoir Cap 1J0121403B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 059117015K

Audi Q7 4M Engine Oil Cooler Radiator 3.0 TDI 059117015K

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0121292E

Audi A7 4G Engine Radiator Coolant Upper Centre Cover Panel 4G0121292E

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06J103221-1

Audi TT 8J 1.8 TFSI Tank Breather Ventilation Pipe Line 06J103221

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7L0819857C

Audi Q7 4L Coolant Pipe Hose Line Duct Tube 3.0 TDI 7L0819857C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8J0121109E

Audi TT Mk2 8J Water Coolant Pipe Hose 1.8 2.0 TFSI CDAA CESA Petrol 8J0121109E

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 059121399K

Audi SQ5 8R 3.0 TDI Diesel Coolant Hose Line Tube Pipe 059121399K

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L121011G

Audi A3 8P TT 8J VW Golf Mk5 Mk6 Water Coolant Pump 2.0 TDI 03L121011G

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

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