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 A3 8P 2.0 TDI Diesel Water Hose Cooling Coolant Pipe Line 3C0121157CC

€23.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 04E121070AC

Audi A1 8X 1.4 TFSI CZCA Radiator Coolant Hose Line Tube Pipe 04E121070AC

€23.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 6R0121093B

Audi A1 8X Additional Coolant Pump Bracket Mount Support Holder 6R0121093B

€23.95

Free delivery: Sep 21 – 24

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Part no. 03L121132

Audi A3 8P 2.0 TDI CBAB Coolant Thermostat Housing Flange 03L121132DE

€23.95

Free delivery: Sep 21 – 24

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Part no. 7L8121070BG

Audi Q7 4L Water Coolant Pipe Hose Line 3.0 TDI 7L8121070BG

€47.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 8K0121207B-2

Audi A4 B8 Radiator Fan Engine Motor Cooling Coolant Unit 993454J-D

€28.95

Free delivery: Sep 21 – 24

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Part no. 8K0959501F

Audi A4 B8 Radiator Fan Relay Radiator Electrical Module Control Unit 8K0959501F

€28.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 5N0121086D

Audi Q3 8U Coolant Cooling Hose Pipe Line 2.0 TDI Diesel Engine 5N0121086D

€28.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 7L8122051B

Audi Q7 4L VW Touareg 7L 4.2 TDi Coolant Hose Water Pump Pipe 7L8122051B

€32.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 4F0121055AC

Audi A6 C6 Engine Cooling Coolant Hose Pipe Line 2.7 TDI 4F0121055AC

€23.95

Free delivery: Sep 21 – 24

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Part no. 07K121061B

Audi RSQ3 F3 Water Coolant Hose Pipe Line 2.5 TFSI 07K121061B

€32.95

Free delivery: Sep 21 – 24

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Part no. 8J0121283A

Audi TT 8J Radiator Air Guide Duct Trim Left N/S 8J0121283A

€23.95

Free delivery: Sep 21 – 24

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Part no. 059121008K

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

€23.95

Free delivery: Sep 21 – 24

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Part no. 07K121111C

Audi RS3 8V Engine Coolant Thermostat Housing 2.5 TFSI DAZA 07K121111C

€332.95

Free delivery: Sep 21 – 24

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Part no. 8K0121101P

Audi A4 B8 2.0 TDI Diesel Water Pipe Engine Cooling Coolant Hose Line 8K0121101P

€23.95

Free delivery: Sep 21 – 24

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Part no. 1K0122063J

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

€23.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 8K0122101J

Audi A4 B8 A5 8T Heater Water Cooling Coolant Pipe Hose Line 3.0 TFSI 8K0122101G

€37.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 5N0122109AH

Audi Q3 8U Coolant Hose Radiator Cooling Water Pipe Line 5N0122109AH

€32.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 1K0959455ET

Audi S3 8P 2.0 TFSI CDLA Cooling Radiator Fan Shroud Right O/S 1K0959455ET

€32.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 06E121083N

Audi A4 S4 B8 3.0 TFSI Water Hose Coolant Pipe Line Tube 06E121083N

€37.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 04L122157BT

Audi A4 B9 A5 F5 Water Coolant Cooling Hose Pipe 2.0 TDI 04L122157BT

€23.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 4F0121284G

Audi A6 C6 Radiator Air Duct Guide Channel Front Right O/S 2.0 TDI 4F0121284G

€23.95

Free delivery: Sep 21 – 24

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Part no. 6C0129637

Audi A1 8X 1.8 TFSI TSI Engine Water Coolant Pipe Hose Line Tube 6C0129637

€28.95

Free delivery: Sep 21 – 24

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Part no. 5Q0122101CE

Audi TTS FV Radiator Water Coolant Hose Pipe Tube Line Quick Release 5Q0122101CE

€28.95

Free delivery: Sep 21 – 24

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Part no. 8K0121405F

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

€23.95

Free delivery: Sep 21 – 24

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Part no. 80A121081ED

Audi Q5 FY Coolant Hose With Quick Release Coupling Engine Bay 80A121081ED

€23.95

Free delivery: Sep 21 – 24

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Part no. 8R0819334AE

Audi Q5 8R Engine Coolant Water Hose Pipe Line 2.0 Diesel 8R0819334AE

€32.95

Free delivery: Sep 21 – 24

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Part no. 5Q0121407D-1

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

€23.95

Free delivery: Sep 21 – 24

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Part no. 4G0819377Q

Audi A6 C7 4.0 TFSI CRDB Coolant Hose Pipe Tube 4G0819377Q

€23.95

Free delivery: Sep 21 – 24

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Part no. 1K0122101GQ-1

Audi A3 8P Water Coolant Pipe Hose Line 1.4 TFSI CAXC 1K0122101GQ

€23.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 8J0121447H

Audi TT 8J 2.0 TDI CFGB Engine Coolant Hose Pipe 8J0121447H

€23.95

Free delivery: Sep 21 – 24

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Part no. 4K0145963C

Audi A6 C8 Water Coolant Pipe Hose Line 50 TFSIe 4K0145963C

€28.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 06K121085M-1

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

€23.95

Free delivery: Sep 21 – 24

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Part no. 7L8121058A

Audi Q7 4L 4.2 TDI Coolant Hose Radiator Pipe Water Cooling Line 7L8121058A

€23.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 7H0819617-1

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

€23.95

Free delivery: Sep 21 – 24

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Part no. 7L8121058

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

€23.95

Free delivery: Sep 21 – 24

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Part no. 059121012A

Audi A6 C7 Additional Auxiliary Water Coolant Pump 059121012A

€23.95

Free delivery: Sep 21 – 24

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Part no. 06D121133A

Audi A4 B7 Water Coolant Engine Cooling Flange Pipe Hose Line 06D121133A

€28.95

Free delivery: Sep 21 – 24

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Part no. 4K0145947E

Audi A6 C8 A7 4G Water Coolant Pipe Hose Line 50 TFSIe 4K0145947E

€56.95

Free delivery: Sep 21 – 24

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Audi A6 C7 A7 4G Water Coolant Pipe Hose Line 3.0 TDI 4G0122449K

-2%

Part no. 4G0122449K

Audi A6 C7 A7 4G Water Coolant Pipe Hose Line 3.0 TDI 4G0122449K

Promo price

€23.95

€23.45

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 04L965559

Audi A4 B8 Auxiliary Water Coolant Pump Mount Bracket 2.0 TDI 04L965559

€23.95

Free delivery: Sep 21 – 24

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Part no. 6R0121070L

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

€28.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 8E0121107AG

Audi A4 B7 2.0 TDI Water Hose Vent Coolant Radiator Pipe Line 8E0121107AG

€23.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 06D117021C

Audi S3 8P 2.0 TFSI Engine Oil Radiator Cooler Unit 06D117021C

€23.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 06M121075L

Audi A4 B9 A5 S5 F5 Water Hose Cooling Radiator Coolant Pipe 3.0 TFSI 06M121075L

€23.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 06L121085AF

Audi Q5 FY A4 B9 8W 2.0 TFSI Petrol Engine Water Coolant Pipe Hose 06L121085AF

€28.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 4K0145050C

Audi A6 C8 Engine Water Coolant Pipe Hose Line 50 TFSIe 4K0145050C

€28.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 8R0819332J

Audi Q5 8R 2.0 TDI Engine Water Coolant Pipe Hose Line Diesel 8R0819332J

€23.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 1K0121157BJ

Audi A4 B7 2.0 TDI Diesel Water Hose Cooling Coolant Pipe Line 1K0121157BJ

€23.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 8W0819334G

Audi A4 S4 8W B9 A5 S5 F5 Heater Water Coolant Hose Pipe Line 8W0819334G

€28.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 04E121070L

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

€23.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 06E121005

Audi Q7 4L 3.0 TDI CASA Diesel Engine Coolant Water Pump 06E121005

€23.95

Free delivery: Sep 21 – 24

If paid before 14:00

Part no. 6C0121253A

Audi A1 8X 1.6 TDI Engine Radiator Water Coolant Unit Cooler 6C0121253A

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Part no. 8K0121003L

Audi A4 B8 Q5 8R Engine Cooling Radiator Fan Shroud Coolant Panel 8K0121003L

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Part no. 5G0965567

Audi A1 8X Volkswagen Golf Mk7 Passat B8 Auxiliary Water Pump Coolant 5G0965567

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Part no. 06L121111J

Audi S3 8V 2.0 TFSI DJHA Water Pump Thermostat Coolant Regulator 06L121111J

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Part no. 5Q0122101CM

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

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Part no. 1K0121251BN

Audi A3 8P Engine Intercooler Radiator 1K0121251BN

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Part no. 06A121497Q

Audi TT 8N 1.8T AUM Turbo Coolant Return Feed Pipe Hose Line Tube 06A121497Q

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Part no. 03G121065AE

Audi A3 8P Seat Leon Mk2 2.0 TDI Water Coolant Cooling Pipe Hose Line 03G121071A

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Part no. 5Q0122157CL

Audi A3 8V 35 TDI Water Hose Cooling Radiator Coolant Pipe Line 5Q0122157CL

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Part no. 5Q0121591AN

Audi Q3 8U Auxiliary Water Pump Electric Coolant Unit Valve 5Q0121591AN

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Part no. 8E0121207E-1

Audi A4 B6 B7 Radiator Fan Engine Motor Cooling Coolant Unit 8E0121207E

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Part no. 04L121058AM

VW Tiguan 5N Water Hose Cooling Coolant Pipe Line 2.0 TDI Diesel 04L121058AM

Product currently unavailable

Part no. 06K109121B

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

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Part no. 7L0965561J

Audi Q7 4L Additional Auxiliary Water Coolant Pump 7L0965561J

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Audi A4 B7 2.0 TDI Water Hose Radiator Coolant Pipe Line 03G121157G

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Part no. 4F0121403M

Audi A6 C6 Coolant Expansion Tank Reservoir Bottle Tank 4F0121403M

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Part no. 6R0145805F

Audi A1 8X Motor Engine Coolant Radiator Intercooler Diesel 6R0145805F

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Part no. 057121598L

Audi Q7 4L 4.2 TDI Alternator Turbo Coolant Pipe Hose Right O/S 057121598L

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Part no. 4F0121101Q

Audi A6 C6 Water Hose Cooling Radiator Coolant Pipe Line 2.0 TDI 4F0121101Q

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Part no. 8K0121081AC

Audi A4 B8 A5 8T A6 Coolant Expansion Bottle Pipe Hose 3.2 FSI 8K0121081AC

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Part no. 8K0959501C

Audi A4 B8 A5 8T Radiator Cooling Fan Relay Module Control Unit 8K0959501C

Product currently unavailable

Part no. 4G0121049AN

Audi S6 C7 A7 Sportback Coolant Hose Line Pipe 4G0121049AN

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Part no. 8K0317823B

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

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Part no. 07K121063G

Audi RS3 8Y 2.5 TFSI Petrol Engine Coolant Hose Line Tube Pipe 07K121063G

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Part no. 06Q919519R

Audi A3 S3 8Y 2.0 TFSI Exhaust Gas Temperature Sensor 06Q919519R

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Part no. 7L6122109D

Audi Q7 4L TFSI Water Hose Cooling Coolant Radiator Pipe Line 7L6122109D

Product currently unavailable

Part no. 03L121071C

Audi A4 B8 2.0 TDI Water Hose Radiator Coolant Pipe Line 03L121071C

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Part no. 8E0121107AH

Audi A4 B7 2.0 TDI Water Hose Vent Coolant Radiator Pipe Line 8E0121107AH

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Part no. 06H115251M

Audi A5 8T 2.0 TFSI CDNB Oil Suction Line Tube Pipe Hose 06H115251M

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Part no. 1K0121251AK

Audi A3 8P Coolant Radiator Water Cooling Diesel 1.9 2.0 TDI 1K0121251AK

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Audi RS3 8Y Auxiliary Additional Electric Water Pump Unit 2.5 Petrol 07K965561B

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Audi A4 B7 A6 Avant Coolant Hose PIpe Line 03G121157B

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

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Audi A4 B7 2.0 TDI Diesel Coolant Radiator Water Cooling Radiator 8E0121251A

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Audi A4 B9 A5 F5 Engine Coolant Thermostat Housing Diesel 2.0 TDI 05L121111H

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Oil Filter Housing Audi A4 B8 A5 8T Q5 8R 2.0 TDI Engine Oil Cooler 03N115389H

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Audi A4 B7 2.0 TDI BRE Diesel Engine Water Coolant Thermostat Housing 03G121121C

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Audi A4 S4 B9 8W A5 S5 F5 Heater Water Coolant Hose Pipe Line 8W0819342B

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Audi A5 8F Water Coolant Pipe Hose Line Tube 8K1819350AT

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Audi A3 8P Water Radiator Shroud Fan Engine Cooling 1K0959455FB

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Part no. 7L0959455F

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

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Part no. 8K0805201A

Audi Q3 8U Q3 S3 Radiator Support Mount Holder Left Right N/O/S 8K0805201A

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Part no. 06B121111K

Audi A4 B7 1.8T Coolant Thermostat Regulator Housing 06B121111K

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Part no. 8W0959455J

Audi A4 B9 Radiator Fan Engine Cooling Fan Motor Blades 400W 8W0959455J

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Part no. 5Q0122051AL

Audi A3 8V Water Coolant Cooling Pipe Hose Line Diesel Engine 5Q0122051AL

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Part no. 8W0819342L

Audi A5 F5 Water Return Coolant Pipe Hose Line 8W0819342L

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Part no. 4K0145879AA

Audi A6 C8 Auxiliary Water Coolant Pump Mount Bracket Holder 4K0145879AA

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