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 A5 8T Engine Water Coolant Pipe Cooling Hose Line 2.0 Petrol 1K0122109AL

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0122073AB

Audi A3 8V 2.0 TFSI Water Coolant Hose Tube Line Pipe 5Q0122073AB

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1K0122063G

Audi S3 8P 2.0 TFSI CDLA Petrol Engine Water Coolant Pipe Hose Line 1K0122063G

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 05L121111P

Audi A4 B9 A5 F5 Engine Coolant Thermostat Housing Diesel 2.0 TDI 05L121111P

€113.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06D121132A

Audi A4 B7 Water Coolant Flange Pipe Hose Line 2.0 TFSI 06D121133C

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 079121065P

Audi A4 B7 4.2 V8 Petrol Coolant Pipe Cooler Water Hose 079121065P

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 04L121058AM

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

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1K0121407A

Audi A3 8P Expansion Tank Header Coolant Reservoir Bottle 1K0121407A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 04E122447M

Audi Q3 8U Coolant Hose Tube Line Pipe 04E122447M

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03C121070L

Audi A3 8P Water Hose Radiator Coolant Pipe Line Petrol 03C121070L

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 079121036C

Audi RS4 RS5 B8 8T Engine Coolant Hose Pipe 4.2 V8 CFSA 079121036C

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03L965561

Audi A4 B8 A5 8T 2.0 Diesel Additional Auxiliary Water Pump 03L965561

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4F0121049E

Audi A4 B7 A6 C7 Engine Water Coolant Pipe Hose Line 2.0 TFSI 4F0121049E

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8D0121200

Audi A4 B7 A6 C6 A8 D3 Radiator Retaining Peg Clip Mount Bracket 8D0121200

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6R0122157AA

Audi A1 8X Water Pipe Hose Line Cooling Coolant Unit Hose 6R0122157AA

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1K0122051CM

Audi S3 8P Water Hose Cooling Coolant Radiator Pipe Line 1K0122051CM

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5N0122051BG

Audi Q3 8U Coolant Hose Tube Pipe Line 5N0122051BG

€23.95

Free delivery: Aug 5 – 10

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: Aug 5 – 10

If paid before 14:00

Part no. 5N0122157BE

Audi Q3 8U Coolant Hose Tube Line Pipe Quick Release Coupling 5N0122157BE

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0959501G

Audi A4 B8 Radiator Fan Relay Radiator Electrical Module Control Unit 8K0959501G

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5N0122101AP

Audi Q3 8U Coolant Hose Tube Line Pipe 5N0122101AP

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 079121096T

Audi A5 S5 8T Oil Cooler Coolant Pipe Hose Tube Line 079121096T

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6R0122101CA

Audi A1 8X Coolant Hose Water Pump Pipe Cooling Line 1.4 Petrol 6R0122101CA

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 04L121065

Audi A3 8V Engine Water Coolant Pipe Cooling Hose Line 04L121065

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06E121018A

Audi Q5 8R Auxiliary Water Pump Coolant Circulation Cooling Unit 06E121018A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1K0121070BD

Audi TT 8J Water Hose Cooling Tank Coolant Pipe Line 1K0121070BD

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06M121013

Audi A4 B9 A5 F5 Engine Water Pump Unit 06M121013

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 04L121058H

Audi TT FV Q3 8U Water Hose Cooling Coolant Pipe Line 2.0 TDI Diesel 04L121058H

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 420121252AL

Audi R8 42 Additional Auxiliary Radiator Left N/S Cooling Unit 420121252AL

€237.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 80A819350AP

Audi Q5 FY Water Coolant Pipe Hose Line 2.0 TDI Diesel 80A819350AP

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8J0121051Q

Audi TT Mk2 8J 2.0 TDI Engine Water Coolant Pipe Hose Line 8J0121051Q

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06H906517Q

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

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06F121056C

Audi A1 8X A3 8P TT 8J VW Golf Mk5 Water Coolant Hose Pipe Line 06F121056C

€47.95

Free delivery: Aug 5 – 10

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 5 – 10

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 5 – 10

If paid before 14:00

Part no. 059121512N

Audi A6 4G Q5 8R 2.0 TDI Diesel Water Hose Line Tube Pipe 1K0121096R 059121512N

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06E121111AL

Audi S4 B8 Engine Water Coolant Thermostat Housing 3.0 TFSI Petrol 06E121111AL

€32.95

Free delivery: Aug 5 – 10

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: Aug 5 – 10

If paid before 14:00

Part no. 059121005TX-1

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

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1K0122109

Audi A3 8P Water Hose Cooling Coolant Pipe Line 1K0122109

€23.95

Free delivery: Aug 5 – 10

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 5 – 10

If paid before 14:00

Part no. 5Q0121064BB

Audi A3 8V Water Pipe Hose Engine Cooling Coolant Unit Line 5Q0121064BB

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5N0122073AC

Audi Q3 8U Water Hose Cooling Radiator Coolant Pipe Line 5N0122073AC

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06M117015M

Audi S5 F5 Q5 FY Engine Oil Cooler Heat Exchanger 3.0 TFSI 06M117015M

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 05L122157AS

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

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06E121044M

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

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4G0819374L

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

€23.95

Free delivery: Aug 5 – 10

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: Aug 5 – 10

If paid before 14:00

Part no. 4F0121107AH

Audi A6 C6 Water Coolant Pipe Hose Line 2.0 TFSI 4F0121107AH

€23.95

Free delivery: Aug 5 – 10

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: Aug 5 – 10

If paid before 14:00

Part no. 8W0906088F

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

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0121036E

Audi A4 B8 A5 8T A5 S5 Radiator Coolant Hose Tube Line Pipe 8K0121036E

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 059145771AQ

Oil Hose Audi A6 C7 Q5 8R Turbine Cooling Pipe Line 059145771AQ

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 04L121064AC

Audi A3 8V Engine Water Coolant Pipe Cooling Hose Line 04L121064AC

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1T0820036D

AUDI Q7 4L 3.0 TDI Quattro Coolant Electro Magnetic Valve Water Line 1T0820036D

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06M121115K

Thermostat Housing Audi A4 B9 A5 F5 Petrol Engine Water Coolant 06M121115K

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06J145771D

Audi TT 8J 1.8 TFSI CDAA High Pressure Oil Feed Pipe Hose Line Tube 06J145771D

€23.95

Free delivery: Aug 5 – 10

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: Aug 5 – 10

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: Aug 5 – 10

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: Aug 5 – 10

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: Aug 5 – 10

If paid before 14:00

Part no. 8K0133889B

Audi RS4 B8 4.0 FSI CFSA Petrol Coolant Hose Upper Top Left O/S 8K0133889B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1K0122073B

Audi Seat Skoda Volkswagen Water Return Coolant Pipe Hose Line 1K0122073B

€23.95

Free delivery: Aug 5 – 10

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: Aug 5 – 10

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: Aug 5 – 10

If paid before 14:00

Part no. 059121016G

Audi A6 C7 A7 4G Q7 4M Water Coolant Pump 3.0 TDI 059121016G

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 04L122157BA

Audi A5 8T Heater Water Cooling Coolant Pipe Hose Line 04L122157BA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 022121011

Audi A3 8P 3.2 BMJ Petrol Engine Water Coolant Pump 022121011

€42.95

Free delivery: Aug 5 – 10

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: Aug 5 – 10

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: Aug 5 – 10

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: Aug 5 – 10

If paid before 14:00

Part no. 8K0121212C

Audi RS4 B8 Additional Auxiliary Radiator Left N/S Engine Cooling 8K0121212C

€146.95

Free delivery: Aug 5 – 10

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: Aug 5 – 10

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: Aug 5 – 10

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: Aug 5 – 10

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: Aug 5 – 10

If paid before 14:00

Part no. 3AA122157

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

€23.95

Free delivery: Aug 5 – 10

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: Aug 5 – 10

If paid before 14:00

Part no. 4F0121403M

Audi A6 C6 Coolant Expansion Tank Reservoir Bottle Tank 4F0121403M

€23.95

Free delivery: Aug 5 – 10

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 5 – 10

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: Aug 5 – 10

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: Aug 5 – 10

If paid before 14:00

Part no. 07L121070Q

Audi S8 D3 Quattro 5.2 FSI V10 BSM Coolant Pipe Right Water Line 07L121070Q

€23.95

Free delivery: Aug 5 – 10

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: Aug 5 – 10

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: Aug 5 – 10

If paid before 14:00

Part no. 04L122157BC

Audi A5 8T Heater Water Cooling Coolant Pipe Hose Line 04L122157BC

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 059121075DK

Audi A8 D4 Coolant Cooling Hose Pipe Line Tube 059121075DK

€28.95

Free delivery: Aug 5 – 10

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: Aug 5 – 10

If paid before 14:00

Part no. 4G0121081CS

Audi A6 C7 Expansion Coolant Tank Breather Vent Pipe Line 4G0121081CS

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 83A819371

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

€70.95

Free delivery: Aug 5 – 10

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: Aug 5 – 10

If paid before 14:00

Part no. 420121030A

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

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 059121111N

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

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7L0959455D

Audi Q7 Volkswagen Touareg 7L Radiator Fan Blade Motor 7L0959455D

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6R0122101AQ

Audi A1 8X Coolant Cooling Engine Pipe Hose Line Radiator 6R0122101AQ

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 420121082B

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

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 04L121131AD

Audi A5 8T Water Coolant Flange Pipe Hose Line 04L121131AD

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 04L121064AE

Volkswagen Seat Skoda Audi 2.0 TDI Water Coolant Pipe Hose Line 04L121064AE

€23.95

Free delivery: Aug 5 – 10

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: Aug 5 – 10

If paid before 14:00

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