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 Q5 8R 2.0 TDI Coolant Water Hose Cooling Unit Line Tube Pipe 8R0121049J

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06J121065F

Audi TT 8J A3 8P A4 8K Water Hose Cooling Coolant Radiator Pipe Line 06J121065F

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L121065CR

Water Hose Audi A3 8V Skoda Octavia IV 1.6 TDI Coolant Line Pipe 04L121065CR

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L122157BB

Audi A4 B8 A5 8T Water Coolant Pipe Line Hose Tube 2.0 TDI 04L122157BB

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0819376F

Audi A4 B8 Q5 8R A5 8T Water Coolant Hose Pipe Line TFSI Petrol 8K0819376F

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06M121013D

Audi RS5 F5 Engine Water Pump Coolant Cooling Unit Pump 06M121013D

€113.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8E0121403

Expansion Tank Bottle Audi A4 B6 B7 VW Passat Coolant Reservoir Bottle 8E0121403

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0819350G

Audi A4 B9 A5 F5 Water Coolant Heater Hose Pipe 2.0 TDI 8W0819350G

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L121157AH

Audi A5 S5 8F 2.0 TDI Water Hose Cooling Radiator Coolant Pipe Line 03L121157AH

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L122157AQ

Audi A4 B9 A5 F5 Engine Coolant Pipe Hose 2.0 TDI Diesel 04L122157AQ

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6R0121063

Audi A1 8X Water Pipe Hose Line Engine Cooling Coolant Unit Hose 6R0121063

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 03L121132A

Audi A4 B8 2.0 TDI Diesel Thermostat Coolant Housing 03L121132A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04E122157AC

Audi A4 B9 Turbo Charger Coolant Pipe Hose Line Tube 1.4 TFSI 04E122157CA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06E117021G

Audi A6 C7 Oil Cooler Cooling Radiator 06E117021G

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7L0121207E

Audi Q7 4L A/C Air Condition Radiator Fan Shroud Motor 7L0121207E

€113.95

Free delivery: Aug 7 – 11

If paid before 14:00

Part no. 8W0122055BN

Audi A4 B9 A5 F5 Coolant Pipe Radiator Hose Line Tube 2.0 Petrol 8W0122055BN

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06J121132G

Audi TT 8J A4 B8 Water Coolant Flange Pipe Hose Line 06J121132G

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L121157AE

Audi A6 S6 4G 4F Q5 8R Engine Coolant Pipe Hose Tube Line 2.0TDi 03L121157AE

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8R0121081N

Audi A4 B8 A5 8T Radiator Water Coolant Pipe Hose Pipe Line 2.0 TFSI 8R0121081N

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0122449

Audi A7 4G Engine Water Coolant Cooling Hose Pipe Line 3.0 TDI Diesel 4G0122449

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q012210GJ

Audi A3 8V Water Hose Cooling Radiator Coolant Pipe Line 5Q012210GJ

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0819334AE

Audi A5 F5 Coolant Water Quick Connect Heater Pipe Hose 8W0819334AE

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L121070D

Audi A3 8V 2.0 TDI Diesel Water Coolant Hose Pipe Tube Line 04L121070D

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03C121070L

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06J121075F

Audi TT 8J A3 8P Petrol Coolant Hose Diesel Water Pipe Line Tube 06J121075F

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0121088AD

Audi A8 4H Expansion Bottle Tank Radiator Hose Line Tube Pipe 4H0121088AD

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7P0965561

Audi Q7 4L 3.0 TDI BUG Additional Auxiliary Water Coolant Pump 7P0965561

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0121049CA

Audi A3 8P Engine Cooling Radiator Water Coolant Pipe 1.4 TSI CAXC 1K0121049CA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L121157E

Audi A4 S4 8K A5 S5 8T Engine Coolant Hose Tube Line Pipe 2.0 TDI 03L121157E

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8E0959455P-1

Engine Cooling Audi RS4 B7 4.2 Petrol Radiator Coolant Fan Left N/S 8E0959455P

€89.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4L0145738B

Audi Q7 4L 3.0 TDI Engine Coolant Water Pipe Hose Line 4L0145738B

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06E121111G

Audi A4 B7 A8 A6 Coolant Regulator Thermostat Housing 06E121111G

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0121109AL

Audi A3 8P Radiator Water Coolant Hose Pipe Line 1.8 FSI Petrol 1K0121109AL

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A8E0199455F

Audi RS4 B7 Engine Cooling System Guard Plate Cover Bracket Mount A8E0199455F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K0819374R

Audi A6 C8 3.0 TDI Engine Coolant Pipe Water Hose Cooling Line Tube 4K0819374R

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V0121397A

Audi RSQ3 F3 Engine Water Coolant Hose Pipe Left N/S 2.5 TFSI 8V0121397A

€104.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06J121075F-1

Audi TT 8J A3 8P VW Golf GTI 5K Sharan Coolant Hose Water Pipe Line 06J121075F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8J0121447H

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L121093F

Audi A4 S4 8K A5 S5 8F Auxiliary Coolant Water Pump Bracket Mount 03L121093F

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0122101BL

Audi A3 8V 2.0 TDI Water Hose Radiator Coolant Pipe Line Diesel 5Q0122101BL

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 06L145778H

Audi A5 8T Oil Feed Hose Pipe Line 2.0 TFSI Petrol Engine 06L145778H

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V0121030B

Audi RS3 8V RSQ3 F3 Water Coolant Hose Pipe Line 2.5 TFSI 8V0121030B

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8E0959455H-1

Audi Rs4 B7 4.2 Petrol Engine Cooling Radiator Coolant Fan Right O/S 8E0959455H

€47.95

Free delivery: Aug 7 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 06E121065Q

Audi A4 B8 A6 C7 A7 4G A8 D3 Coolant Flange Pipe Hose Line Tube 06E121065Q

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06H121601J

Audi A4 B8 A5 8T A6 C7 2.0 TFSI Additional Water Pump Coolant Unit 06H121601J

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0145923B

Audi A4 S4 B8 A5 S5 8T Radiator Coolant Hose Tube Pipe Line 3.0 TFSI 8K0145923B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2Q0122109E

Audi A1 GB Water Coolant Cooling Pipe Hose Line 1.0 TFSI Petrol 2Q0122109E

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06D121065J

Audi A4 B7 A6 C6 Coolant Hose Line Tube Pipe 2.0 TFSI 06D121065J

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06K103495AG

Audi A3 8V Q3 8U Engine Oil Separator Breather Petrol 2.0 TFSI CULB 06K103495AG

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2Q0122101BP-1

Audi A1 Coolant Cooling Hose Pipe Line 1.0 TFSI Petrol 2Q0122101BP

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7L8121101B

Audi Q7 4L Radiator Water Coolant Pipe Hose Line 3.0 TDI 7L8121101B

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0121405E

Audi A5 8T Expansion Tank Header Coolant Reservoir Bottle 8K0121405E

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0819377C-1

Audi A5 8T Radiator Water Cooling Coolant Pipe Hose Line Diesel 8K0819377C

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2Q0122157B

Audi A1 GB Coolant Cooling Hose Pipe Line 1.0 TSI Petrol 2Q0122157B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L121113D

Audi A4 B9 Thermostat Housing Coolant Regulator 2.0 TDI DEUA 04L121113D

€70.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06H121026N-1

Audi A3 8P VW Golf MK6 Engine Coolant Water Pump 1.8 TFSI Petrol 06H121026N

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2Q0122073H

Audi A1 GB Cooling Coolant Hose Pipe Line 1.0 Petrol Engine 2Q0122073H

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 83A121101A

Audi RSQ3 F3 Engine Coolant Hose Tube Line Pipe 2.5 TFSI QUATTRO DNWA 83A121101A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06M121137AH

Audi A4 B9 A5 F5 Water Coolant Pipe Hose Cooling Line 06M121137AH

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04E121600BE

Audi A3 8V Seat Ateca Kh7 Coolant Pump D Water Pump 04E121600BE

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 079121102F

Audi S5 8T Engine Water Coolant Rubber Pipe Hose 4.2 FSI 079121102F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06L121085K

Audi A4 B8 A5 8T Water Coolant Pipe Hose 2.0 TFSI Petrol Engine 06L121085K

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0121251AT

Volkswagen Jetta Golf 1K Audi A3 S3 Engine Radiator Water Cooler 1K0121251AT

€42.95

Free delivery: Aug 7 – 11

If paid before 14:00

Part no. 8K0121276A

Audi A4 B8 A5 8T Q5 8R Coolant Radiator Mount Holder Bracket Rubber 8K0121276A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7L8121073A

Audi Q7 4L Engine Coolant Hose Tube Line Pipe 7L8121073A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06J117021J

Audi A3 8P TT 8J A4 B7 Oil Cooler 1.8 2.0 TFSI Petrol Engine 06J117021J

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0121081CM

Audi A4 Avant B8 S5 8T A5 S5 Engine Coolant Hose Tube Pipe Line 8K0121081CM

€51.95

Free delivery: Aug 7 – 11

If paid before 14:00

Part no. 1K0133366BK

Audi A3 8P FL TT 8J 1.8 Petrol CDAA Water Coolant Connection Hose 1K0133366BK

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0122157CK

Audi A3 8V Water Hose Cooling Radiator Coolant Pipe Line 2.0 TDI 5Q0122157CK

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 079121065BJ

Audi S5 8T Coolant Pipe Cooler Water Hose Left N/S 4.2 Petrol CAUA 079121065BJ

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0121063AA

Audi A3 8P VW Golf Mk6 Seat Altea Engine Coolant Hose 1.4 Petrol 1K0121063AA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8P0820741A

Audi RS3 8P Refrigerant Hose Cooling Radiator Coolant Pipe Line 8P0820741A

€47.95

Free delivery: Aug 7 – 11

If paid before 14:00

Part no. 03L121111AD

Audi A4 B8 A5 8T Q5 8RB 2.0 TDI Diesel Thermostat Coolant 03L121111AD

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8J0121447F

Audi TT 8J 1.8 Petrol CDAA Engine Coolant Vent Hose Pipe 8J0121447F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0121070BR

Audi A3 8V 2.0 TFSI Water Hose Engine Coolant Cooling Pipe Line 5Q0121070BR

€75.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0145879D

Audi A4 S4 8K A5 S5 8F 8T Additional Coolant Pump Bracket Mount 8K0145879D

€75.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8E0965557A

Audi A4 S4 RS4 B7 Coolant Pump Bracket Mount Holder Support 8E0965557A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0121447AL

Audi A7 4G Coolant Cooling Water Pipe Hose Line 3.0 TDI 4G0121447AL

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0121403G

Audi A6 C7 Expansion Overflow Coolant Reservoir Bottle Tank 4G0121403G

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03G121065R

Audi A4 B7 2.0 TDI BRE Water Coolant Pipe Hose Line 03G121071A

€151.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0121207A-4

Audi A4 B8 Diesel Engine Cooling Radiator Double Coolant Fan Motor 8K0121207A

€56.95

Free delivery: Aug 7 – 11

If paid before 14:00

Part no. 8K0122055B-1

Audi A4 B8 Water Return Coolant Pipe Hose Line 2.0 TDI Diesel Engine 8K0122055B

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06J133781BE

Audi TT 8J Water Hose Cooling Radiator Coolant Pipe Line 06J133781BE

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8E0121058B

Audi RS4 B7 Water Coolant Cooling Pipe Hose Line 4.2 FSI Petrol 8E0121058B

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7L8121058C

Audi Q7 4L 4.2 TDI Water Coolant Pipe Hose Line 7L8121058C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 420260712B

Audi R8 42 Air Conditioning A/C Pipe Hose Cooling Line Tube 420260712B

€66.95

Free delivery: Aug 7 – 11

If paid before 14:00

Part no. 06D121111G

Audi A4 B7 Coolant Regulator Thermostat Housing Pipe 2.0 TFSI BWE 06D121111G

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03C121070D

Audi A3 8P Water Pipe Hose Line Engine Cooling Coolant Unit Hose 03C121070D

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6R0121217

Audi A1 S1 8X GB VW Polo 6R Skoda Fabia 5J Radiator Cooling Fan Ring 6R0121217

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 059121008

Audi A6 C7 A7 4G SQ5 8R 3.0 TDI CGQB Coolant Water Pump Unit 059121008

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0122051FE

Audi TT 8J MK2 Water Hose Cooling Coolant Radiator Pipe Line 1K0122051FE

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 057121057

Audi Q7 4L 4.2 TDI Water Coolant Pipe Hose Line 057121057

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0121207A-5

Audi A4 B8 Diesel Engine Cooling Radiator Double Coolant Fan Motor 8K0121207A

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0121251AB

Audi TT 8N Coolant Radiator Engine Cooling Unit Radiator Cooler 1K0121251AB

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06A121065CQ

Audi A3 8P VW Golf Mk5 Coolant Hose Water Pipe Cooling 1.6 Petrol 06A121065CQ

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0819332M

Audi A4 B8 Water Coolant Pipe Hose Line Tube 2.0 TDI CNHC 8K0819332M

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

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