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 B7 Water Coolant Flange Pipe Hose Line 2.0 TFSI 06D121133C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0121407G

Audi A3 8V Expansion Tank Header Coolant Reservoir Bottle 5Q0121407G

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0145909B

Audi A4 B8 A5 8T 2.0 TDI Water Coolant Pipe Hose Line 4G0145909B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 80A121400B

Audi Q5 FY Water Hose Cooling Coolant Radiator Pipe Line 80A121400B

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L121157Q

Audi Q3 SE Water Hose Cooling Coolant Radiator Pipe Line Hose 03L121157Q

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0959455ES

Audi A3 8P Radiator Fan Engine Cooling Cooler Blower Unit 1K0959455ES

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0145910B

Audi A4 B8 A5 8T 2.0 TDI Water Coolant Pipe Hose Line 4G0145910B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04E122447M

Audi Q3 8U Coolant Hose Tube Line Pipe 04E122447M

€32.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 4G2819350K

Audi A7 4G Heater Radiator Hose Line Pipe 4G2819350K

€32.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. 1K0122109

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5N0122051BG

Audi Q3 8U Coolant Hose Tube Pipe Line 5N0122051BG

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06K121075Q

Audi S3 8V Water Hose Cooling Coolant Radiator Pipe Line 06K121075Q

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. 057121083S

Audi A8 D4 Water Cooling Coolant Pipe Hose Line Tube 4.2 TDI Diesel 057121083S

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5N0122101AP

Audi Q3 8U Coolant Hose Tube Line Pipe 5N0122101AP

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06L121111J

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

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4N0820541

Audi A7 C8 Q7 4M Temperature Sensor Interior Sensor 4N0820541

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 05A906088

Audi A8 D4 Q7 4L Exhaust Gas Temperature Sensor Diesel Engine 05A906088

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 1J0959481A

Audi TT 8N Radiator Fan Switch Temperature Sensor 1J0959481A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03G121096

Audi A4 B8 2.0 TDI Water Hose Radiator Coolant Pipe Line 03G121096

€23.95

Free delivery: Aug 10 – 11

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 7 – 11

If paid before 14:00

Part no. 022121117C

Audi A3 8P 3.2 BMJ Petrol Engine Water Thermostat Coolant Housing 022121117C

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 07L121107C

Audi S8 D3 Radiator Coolant Water Hose Pipe Line 07L121107C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L121070AB

Audi Q3 8U 2.0 TDI DFUA Diesel Water Coolant Hose Pipe Tube Line 04L121070AB

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06M121481L

Audi A4 S4 B9 3.0 TFSI Petrol Water Coolant Pipe Hose Line 06M121481L

€70.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 059121111AA

Audi A5 8T Q5 8R 3.0 TDI Diesel Thermostat Coolant 059121111AA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L117021C

Audi Volkswagen Seat Skoda Diesel Oil Filter Housing Oil Cooler 03L117021C

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. 059121008J

Audi A5 8T 3.0 TDI CDUC Coolant Water Pump 059121008J

€32.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 8R0145910B

Audi Q5 8R 2.0 TDI Quattro Water Hose Coolant Pipe Line 8R0145910B

€28.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. 4E0965559D

Audi S8 D3 Additional Water Coolant Pump 4E0965559D

€56.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. 4F0145738F

Audi A6 C6 3.0 TDI Diesel Turbo Charger Intercooler Pipe Hose Duct 4F0145738F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L121065AK

Audi A5 8T Heater Water Cooling Coolant Pipe Hose Line 04L121065AK

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

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: Aug 10 – 11

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 10 – 11

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: Aug 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. 8K0805201-1

Audi Q5 8R Coolant Mounting Radiator Holder Bracket Set 8K0805201

€28.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 1K0122073FS

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

€28.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 1K0121251BN

Audi A3 8P Engine Intercooler Radiator 1K0121251BN

€32.95

Free delivery: Aug 7 – 11

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 10 – 11

If paid before 14:00

Part no. 5N0122109AE

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

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

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: Aug 10 – 11

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 10 – 11

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: Aug 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. 059121075DK

Audi A8 D4 Coolant Cooling Hose Pipe Line Tube 059121075DK

€28.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 83A819371

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

€70.95

Free delivery: Aug 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

Part no. 059131425A

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

€28.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 059121111N

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

€28.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 8E0965559

Audi RS4 B7 Additional Water Pump Coolant Cooling Unit A8E0965559

€37.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 5Q0121058R

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

€23.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 8K0965567B

Audi A6 C8 Water Electric Pump Auxiliary Coolant Circulation 8K0965567B

€113.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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 10 – 11

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 10 – 11

If paid before 14:00

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