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

€23.95

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Part no. 8R0121101J

Audi Q5 8R 2.0 TDI Coolant Water Hose Line Tube Pipe 8R0121101J

€23.95

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Part no. 8K0121207B-2

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

€28.95

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Part no. 8W0122293AE

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

€23.95

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Part no. 4F0121055AC

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

€23.95

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Part no. 5N0121086D

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

€28.95

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Part no. 07K121061B

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

€32.95

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Part no. 4G0317818S

Audi A7 4G Oil Pipe Line Tube Hose Automatic Gearbox Transmission 4G0317818S

€23.95

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Part no. 03L121031B

Audi A3 8P 2.0 TDI CFFB Diesel Coolant Water Pump 03L121031B

€23.95

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Part no. 8J0121283A

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

€23.95

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Part no. 06L121085AF

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

€28.95

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Part no. 1K0122101KR

Audi TT 8J MK2 Water Hose Cooling Coolant Radiator Pipe Line 1K0122101KR

€23.95

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Part no. 5N0122109AH

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

€32.95

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Part no. 07K121111C

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

€332.95

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Part no. 04E121070AC

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

€23.95

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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

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Part no. 8K0122101J

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

€37.95

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Part no. 4F0819378F

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

€23.95

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Part no. 8R0121081M

Audi Q5 8R Expansion Bottle Tank Radiator Hose Line Tube Pipe 8R0121081M

€23.95

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Part no. 04L122157BT

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

€23.95

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Part no. 8K0133889B

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

€23.95

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Part no. 06M121013

Audi A4 B9 A5 F5 Engine Water Pump Unit 06M121013

€37.95

Free delivery: Sep 23 – 24

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Part no. 1K0122101GQ-1

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

€23.95

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Part no. 6C0129637

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

€28.95

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Part no. 80A121081ED

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

€23.95

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Part no. 8R0819334AE

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

€32.95

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Part no. 4F0121284G

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

€23.95

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Part no. 5Q0122101CE

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

€28.95

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Part no. 03L121132

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

€23.95

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Part no. 07C121599A

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

€23.95

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Part no. 8J0201216C

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

€23.95

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Part no. 5Q0121407D-1

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

€23.95

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Part no. 4H0121101AC

Audi A8 D4 Radiator Coolant Hose Water Pipe Line 3.0 TDI 4H0121101AC

€23.95

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Part no. 8K0121212C

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

€146.95

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Part no. 7L6422376

Audi Q7 4L VW Volkswagen Touareg 7P Steering Tank End Cap Cover 7L6422376

€23.95

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Part no. 4K0145963C

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

€28.95

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Part no. 4G0317818AF

Audi RS6 C7 Oil Pipe Line Tube Hose Automatic Gearbox Transmission 4G0317818AF

€32.95

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Part no. 1K0959455EA

Audi A3 8P Engine Cooling Radiator Diesel Radiator Coolant Fan 1K0959455EA

€37.95

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Part no. 7H0819617-1

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

€23.95

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Part no. 4K0145947E

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

€56.95

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Part no. 3Q0121070AG

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

€28.95

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Part no. 4G0122449K

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

€23.95

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Part no. 8K1819376P

Audi A5 8T 2.0 TFSI Water Hose Cooling Coolant Radiator Pipe Line 8K1819376P

€23.95

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Part no. 04L965559

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

€23.95

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Part no. 8W0819334G

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

€28.95

Free delivery: Sep 23 – 24

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Part no. 8E0121107AG

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

€23.95

Free delivery: Sep 23 – 24

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Part no. 8K0819857B

Audi A5 8T Water Pipe Hose Line Engine Cooling Coolant Unit Hose 8K0819857B

€28.95

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Part no. 06M121071E

Audi SQ5 FY 3.0 TFSI Water Hose Cooling Radiator Coolant Pipe Line 06M121071E

€28.95

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Part no. 4K0145050C

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

€28.95

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Part no. 8R0819332J

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

€23.95

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Part no. 04L121058F

Audi A3 8V A4 B8 Coolant Water Hose Pipe Line 2.0 TDI 04L121058F

€23.95

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Part no. 06D117021C

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

€23.95

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Part no. 06M121075L

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

€23.95

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Part no. 8W0122448S

Audi A5 F5 Water Coolant Hose Line Pipe Tube 8W0122448S

€23.95

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Part no. 8W0145804A-1

Audi A4 B9 A5 5F A6 C8 Auxiliary Coolant Radiator 2.0 TDI 8W0145804A

€42.95

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Part no. 4H0906088AA

Audi A8 D4 Temperature Sensor Diesel Engine Exhaust Gas Sensor Probe 4H0906088AA

€37.95

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Part no. 4H0906088AB

Audi A8 D4 Temperature Sensor Diesel Engine Exhaust Gas Sensor Probe 4H0906088AB

€23.95

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Part no. 03L121101

Audi A4 B8 A5 8T A6 C7 Water Coolant Pipe Hose Line 2.0 TDI 03L121101

€23.95

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Part no. 8W0121448H

Audi A5 F5 2.0 TDI DEZE Water Coolant Hose Line Pipe Tube 8W0121448H

€23.95

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Part no. 06M145963D

Audi A5 S5 F5 Engine Coolant Return Hose Cooling Pipe 3.0 TFSI 06M145963D

€23.95

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Part no. 4G0121448AK

Audi A6 C7 A7 4G Water Coolant Hose Pipe Line 3.0 TDI 4G0121448AK

€23.95

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Part no. 04L121011E-1

Audi A3 8V A4 B8 Electric Water Pump Unit 2.0 TDI Diesel Engine 04L121011E

€28.95

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Part no. 8K0121101M

Water Pipe Audi A4 B8 A5 8T Q5 8R 2.0 TFSI Coolant Hose Line 8K0121101M

€23.95

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Part no. 1K0122073B

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

€23.95

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Part no. 04L121058H

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

€23.95

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Part no. 03C121050P

Audi A1 8X Oil Cooler Water Pipe 1.4 TSI Engine 03C121050P

€23.95

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Part no. 059121031H-1

Water Pump Wheel Audi Q5 8R A7 4G8 3.0 TDI Diesel Coolant Pump Pulley 059121031H

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Part no. 1K0121207BB

Audi A3 8P 1.9 TDI BLS Diesel Radiator Fan Cowling Assembly Shroud 1K0121207BB

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Part no. 7L0965561J

Audi Q7 4L Additional Auxiliary Water Coolant Pump 7L0965561J

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Part no. 8K0121207A

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

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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. 03L122157Q-1

Audi A4 B8 A5 8T Coolant Pipe Water Cooling Line 2.0 TDI 03L122157Q

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Part no. 1K0121070AQ

Audi TT 8J 2.0 TFSI Water Hose Coolant Pipe Line 1K0121070AQ

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Part no. 059121004G

Audi A5 8T 3.0 TDI CCWA Diesel Auxiliary Additional Water Pump 059121004G

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Part no. 03C121469D

Audi A1 8X Turbo Water Coolant Hose Line Return Tube Pipe 03C121469D

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Part no. 03L122157M

Audi A4 B8 2.0 TDI Water Hose Radiator Coolant Pipe Line 03L122157M

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Part no. 059121086AH

AUDI Q7 4L Quattro Diesel CRCA 3.0 TDI Coolant Hose Water Line 059121086AH

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Part no. 8K0121081F

Audi A5 8T 3.0 TDI CCWA Diesel Coolant Hose Line Pipe Tube 8K0121081F 059121399E

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Audi A3 8P 1.9 TDI BLS Diesel Coolant Water Hose Line Tube Pipe 1K0122447ED

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Audi Q7 4L Water Hose Cooling Coolant Radiator Pipe Line 059121065AT

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Audi A4 B8 1.8 TFSI Water Hose Cooling Radiator Coolant Pipe Line 06H121085C

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Audi A1 8X Turbocharger Water Feed Hose Cooling Coolant Pipe Line 03C121497C

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Audi A1 8X 1.2 TFSI CBZA Radiator Water Coolant Pipe Hose Line 6R0121447AJ

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Audi A3 8P Air Quality Sensor 4B0907659A

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Audi Seat Skoda Volkswagen Auxiliary Water Pump Valve Coolant 5Q0906457K

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

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Audi A3 8V S1 8X Engine Cooling Fan Radiator Fan Blower 5Q0959455AH

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Audi TT 8J 2.0 TFSI Turbo Coolant Return Pipe Hose Line 06F121492L

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Audi TT 8N 1.8T AUM Turbo Oil Return Pipe Hose Line Tube 06A145735AA

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

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Audi A4 B8 Q5 8R Engine Cooling Radiator Fan Shroud Coolant Panel 8K0121003N

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Audi A3 8P Coolant Reservoir Expansion Overflow Line Pipe Hose Tube 1K0122109BB

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Audi A3 8P Water Coolant Pipe Line Hose Cooling Unit 2.0 TDI 3C0122101BM

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Audi A4 B8 A5 8T A6 C7 A7 4G 3.0 TDI Exhaust Gas Temperature Sensor 059906088BB

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Part no. 03L965561A

Audi A4 B8 2.0 TDI Auxiliary Water Pump Coolant Circulation Bracket 03L965561A

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Audi A7 4G 3.0 TDI Quattro Water Hose Cooling Radiator Pipe Line 059121465A

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Part no. 8K0959501C

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

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Audi SQ5 8R 3.0 TDI CGQB Twin Turbo Coolant Feed Pipe Hose Line 059121598R

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

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