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 B8 2.0 TDI CNHC Electric Water Pump 04L121011E

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03L121157AA

Audi A4 B8 A5 8T Water Hose Cooling Radiator Pipe Line 2.0 TDI 03L121157AA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03L122157E

Audi A3 8P TT 8J VW Scirocco Mk3 Water Coolant Pipe Hose Line 2.0 TDI 03L122157E

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06H121057G

Audi A4 B8 A5 8T Water Hose Cooling Coolant Radiator Pipe Line 06H121057G

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 057121163C

Audi A8 D4 Q7 4L Engine Water Coolant Hose Pipe Line 4.2 TDI V8 057121163C

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 04L122157CC

Audi A4 B9 2.0 TDI Diesel Engine Coolant Hose Line Pipe Tube 04L122157CC

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03N115389H-1

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

€32.95

Free delivery: Aug 5 – 10

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 5 – 10

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 5 – 10

If paid before 14:00

Part no. 8J0121051Q-1

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

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 07K145778F

Audi RS3 8V 8Y Turbocharger Turbo Oil Feed Pipe Line Tube 2.5 TFSI 07K145778F

€80.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7L0815987E

Audi Q7 4L Auxiliary Water Heater Feed Coolant Pipe Hose Diesel 7L0815987E

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8S0121284B

Audi TT FV Radiator Fan Air Guide Mount Bracket Right O/S 8S0121284B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7L0121207D

Audi Q7 4L 3.0 TDI BUG Diesel A/C Air Condition Radiator Fan Shroud 7L0121207D

€104.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0145922A

Audi S4 B8 Engine Coolant Pipe Hose Line Left N/S Outer 3.0 TFSI 8K0145922A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 059121507AB

Audi A5 8T Engine Coolant Cooling Hose Pipe Line 3.0 TDI Diesel 059121507AB

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06H133514K

Audi A5 8T 2.0 TFSI CDNB Vacuum Solenoid Coolant Line Tube Hose Pipe 06H133514K

€32.95

Free delivery: Aug 5 – 10

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 5 – 10

If paid before 14:00

Part no. 06E121168

Audi A4 B7 A4 B8 A5 B8 Q5 Water Coolant Flange Cover 06E121168

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8R0121101G

Audi A4 B8 A5 Water Coolant Hose Pipe Line 8R0121101G

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K1819350AB

Audi A4 B8 A5 8T Heater Matrix Connecting Pipe Coolant Hose Tube 8K1819350AB

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4K2819347F

Audi A6 C8 Coolant Hose Line Pipe Tube Engine Cooling 4K2819347F

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03L121157AK

Audi A4 S4 8K A5 S5 8F Engine Water Coolant Hose Tube Pipe Line 03L121157AK

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4F0121081G

Audi A6 C6 Water Hose Coolant Cooling Tube Pipe Line 2.7 Diesel 4F0121081G

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0819377C

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

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0121049M

Water Pipe Audi A4 B8 A5 8T 2.0 TFSI Coolant Hose Line 8K0121049M

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8J0121157A

Audi TT TTS 8J Engine Coolant Hose Tube Line Quick Coupling 8J0121157A Automatic

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 04L121026R-1

Audi A5 8T 2.0 TDI CNHA Thermostat Housing Pipe Hose Line Tube 04L121026R

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 07K145735G

Audi RS3 8Y Turbocharger Turbo Oil Return Pipe Line 2.5 Petrol 07K145735G

€89.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4K0122101AT

Audi A6 C8 Water Pipe Hose Line Cooling Coolant 4K0122101AT

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 059121737AR

Audi A6 C8 A7 4G Q7 4M Coolant Control Regulating Valve 3.0 Diesel 059121737AR

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4H0959455AD-1

Audi A6 C7 Radiator Fan Shroud Coolant Unit Cover Left N/S 4H0959455AD

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 04E121600BD

Audi A1 8X 1.4 TFSI CZCA Petrol Engine Water Pump 04E121600BD

€28.95

Free delivery: Aug 5 – 10

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 5 – 10

If paid before 14:00

Part no. 07K121492H

Audi RS3 8Y Engine Cooling Coolant Return Water Hose Line 2.5 Petrol 07K121497H

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0819334Q

Audi A5 S5 8T Coolant Water Hose Line Tube Pipe 3.0 TFSI 8K0819334Q

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 2Q0121321A-1

SEAT Audi Volkswagen Skoda Water Coolant Expansion Tank Cap Cover 3C0121321

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06H121026BF

Audi A3 8P A4 B8 A5 8T Water Coolant Pump 1.8 TFSI Petrol 06H121026DS

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 059122471AB

Audi Q7 4M Q8 Mk1 Engine Coolant Hose Line Tube Pipe Set 3.0 Diesel 059122471AB

€94.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 059121064N

Audi A6 C8 Q5 FY Q7 4M Water Hose Coolant Pipe Line 3.0 TDI 059121064N

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06E121045AS

Audi A4 S4 B8 S5 8T Water Hose Radiator Coolant Pipe Line 3.0 TFSI 06E121045AS

€61.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1K0998262AA

Audi A8 D3 A6 C6 Exhaust Gas Temperature NOX Lambda Probe Sensor 1K0998262AA

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4K0819374Q

Audi A6 C8 Engine Coolant Pipe Water Hose Cooling Line Tube 4K0819374Q

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03L121157-1

Audi A4 B8 A5 8T A6 C6 Water Coolant Pipe Hose Line 2.0 TDi Diesel 03L121157

€23.95

Free delivery: Aug 5 – 10

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 5 – 10

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 5 – 10

If paid before 14:00

Part no. 4F0145731S

Audi A6 C6 Turbo Coolant Hose Line Tube Pressure Pipe 2.0 Petrol 4F0145731S

€66.95

Free delivery: Aug 5 – 10

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 5 – 10

If paid before 14:00

Part no. 04L121071G

Audi A4 B9 2.0 TDI DETA Diesel Water Coolant Hose Pipe Tube Line 04L121071G

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03L117021C

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

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 059121004J

Audi A5 8T Additional Auxiliary Water Pump 059121004J

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03G121473

Audi A4 S4 Avant 8E Water Coolant Pipe Hose 2.0 Diesel Engine Vent 03G121473

€23.95

Free delivery: Aug 5 – 10

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 5 – 10

If paid before 14:00

Part no. 4M0819927CP

Audi Q7 4M Water Coolant Hose Tube Line Pipe 3.0 TDI Diesel Set 4M0819927CP

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 059121085Q

Audi A6 C8 Q7 4M Coolant Water Pipe Hose Line Tube 3.0 TDI 059121085Q

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0121109S

Audi A3 8V Water Coolant Engine Cooling Flange Pipe Hose Line 5Q0121109S

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0121619A

Audi A3 8V TT FV VW Golf Mk7 Water Coolant Connector Flange Diesel 5Q0121619A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0122101BE

Audi A3 8V Water Hose Radiator Coolant Pipe Line Diesel 5Q0122101BE

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03G121113A

Audi A3 8P 1.9 TDI BLS Diesel Coolant Thermostat 03G121113A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W0122293AE

Audi A4 B9 2.0 TDI DETA Water Coolant Hose Line Tube Pipe 8W0122293AE

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4F0819378F

Audi A6 C6 2.0 TFSI Coolant Water Heater Pipe Hose Line 4F0819378F

€23.95

Free delivery: Aug 5 – 10

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 5 – 10

If paid before 14:00

Part no. 1K0122101DK-1

Audi TT 8J Upper Radiator Coolant Hose Pipe 2.0 TFSI BWA 1K0122101DK

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 07L121481H

Audi A6 C6 S8 D3 Engine Water Coolant Pipe Line Tube Hose 07L121481H

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8J0201216C

Audi TT 8J Water Coolant Hose Line Return Tube Pipe 8J0201216C

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6R0122447K-1

Audi A1 8X Coolant Water Pipe Hose Line Engine Cooling 6R0122447K

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06F121011

Audi A4 B7 Water Coolant Pump Engine Cooling Unit 2.0 Petrol 06F121011

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0965561A

Audi A4 B8 A5 8T 2.0 TFSI Water Pump Auxiliary Coolant Circulation 8K0965561A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0819147

Audi A4 A5 8T Auxiliary Water Pump 2.0 TDI TFSI Diesel Petrol 8K0819147

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06D145735B

Audi A4 B7 2.0 TFSI BGB Petrol Oil Hose Line Tube Pipe 06D145735B

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1K0122101GG

Audi A3 8P Water Coolant Pipe Hose Line 1.8 FSI BZB Petrol Engine 1K0122101GQ

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06H121601P

Audi A6 C8 A5 F5 Q7 4M Electric Additional Auxiliary Water Pump 06H121601P

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0122073BK

Audi Q3 8U Water Coolant Hose Tube Line Pipe 2.0 TDI Diesel 5Q0122073BK

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06H121026N

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

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8S0201801

Audi TT FV Petrol Activated Charcoal Tank Reservoir 8S0201801

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 059145736G

Audi A7 4G Turbocharger Lubrication Inlet Oil Feed Line Pipe 3.0 TDI 059145736G

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06K121132

Audi S3 8V Water Coolant Engine Cooling Flange Pipe Hose Line Petrol 06K121132

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 07K121133E

Audi RS3 8V RSQ3 F3 Water Coolant Pump Regulator Flange 2.5 TFSI 07K121133E

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0122293AE

Porsche Macan 95 Audi A4 S4 8K A5 S5 8F Thermostat Quick Coupling 8K0122293AE

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3Q0121070AG

Audi Q2 GA 2.0 TDI Water Hose Cooling Radiator Coolant Pipe Line 3Q0121070AG

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 07C121599A

Audi A6 C6 2.0 TFSI Auxiliary Water Pump Coolant Unit 07C121599A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03L906088BD

Audi A3 8P Temperature Sensor Diesel Engine Exhaust Gas Sensor Probe 03L906088BD

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3C0122101FL

Volkswagen Seat Skoda Audi Water Coolant Pipe Line Hose 2.0 TDI 3C0122101FL

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 059121075BT

Audi Q7 4L 3.0 TDI BUG Diesel Engine Water Coolant Hoses Line Pipe 059121075BT

€80.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03L906088EP

Audi Q5 8R A4 B8 A5 8T Exhaust Gas Temperature Sensor 2.0 TDI 03L906088EP

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0121203G

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

€75.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6C0122109A

Audi A1 8X 1.4 TFSI Engine Water Coolant Pipe Hose Line Tube 6C0122109A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 045121011H

Volkswagen Golf Mk5 Audi A3 8P 1.9 TDI Diesel Engine Water Pump 03C121019D

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8V0121124-1

Audi RS3 8V Engine Oil Coolant Hose Pipe 2.5 TFSI 8V0121124

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 059121008G

Audi A7 4G A4 B9 A6 C7 Water Coolant Pump 059121008G

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6C0122101E

Audi A1 8X 1.4 TFSI Water Coolant Pipe Hose Cooling Line 6C0122101E

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6C0122051AE

Audi A1 8X 1.4 TFSI CZCA Coolant Hose Line Tube Pipe 6C0122051AE

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 05E919501

Seat Ibiza Mk5 Audi A3 8Y Water Coolant Temperature Sensor Control 05E919501

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06F115397H

Audi A4 B7 VW Golf Mk6 Oil Filter Housing Oil Cooler 2.0 Petrol 06F115397H

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1K0998262S

Audi A8 D3 A6 C6 Exhaust Gas Temperature NOX Lambda Probe Sensor 1K0998262S

€23.95

Free delivery: Aug 5 – 10

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 5 – 10

If paid before 14:00

Part no. 03C121111T

Audi A1 8X 1.4 TSI Petrol Engine Water Coolant Thermostat Housing 03C121111T

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5N0965561A

Audi A3 8P Auxiliary Water Pump Coolant Circulation Bracket 5N0965561A

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4F0121283AR

Audi A6 C6 Front Radiator Air Duct Guide Channel Left N/S 4F0121283AR

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

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