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 Additional Auxiliary Water Pump 059121004J

€28.95

Part no. 03G121473

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

€23.95

Part no. 079115289S

Audi A5 RS5 Oil Sump Separator Baffle Plate Panel 4.2 V8 Petrol 079115289S

€23.95

Part no. 8J0121447F

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

€23.95

Part no. 06N121075C

Audi A4 B9 A5 F5 A6 A7 C8 A8 D5 Q5 F8 Radiator Water Hose Pipe Line 06N121075C

€47.95

Part no. 4M0819927CP

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

€56.95

Part no. 059121085Q

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

€32.95

Part no. 1K0122101AF

Audi A3 8P Engine Coolant Hose Pipe Tube Line 2.0 Petrol AXW 1K0122101AF

€23.95

Part no. 8W2819350L

Audi A4 S4 B9 A5 F5 Engine Water Coolant Hose Pipe Line 2.0 TFSI 8W2819350L

€23.95

Part no. 5Q0121109S

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

€23.95

Part no. 8W0122055BN-2

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

€23.95

Part no. 5Q0121619A

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

€23.95

Part no. 5Q0122101BE

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

€23.95

Part no. 03G121113A

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

€23.95

Part no. 8W0122293AE

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

€23.95

Part no. 4F0819378F

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

€23.95

Part no. 06L121075A

Audi A5 8T A4 B8 Engine Coolant Pipe Hose Line Tube 06L121075A

€37.95

Part no. 1K0122101DK-1

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

€32.95

Part no. 5Q0122051BJ

Audi A3 8V 1.6 TDI CRKB Water Coolant Pipe Hose Line Tube 5Q0122051BJ

€56.95

Part no. 07L121481H

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

€66.95

Part no. 8J0201216C

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

€23.95

Part no. 6R0122447K-1

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

€23.95

Part no. 06F121011

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

€66.95

Part no. 04L121131J

Audi A3 8V Skoda Octavia Mk3 Water Coolant Flange Pipe Hose Line 04L121131J

€23.95

Part no. 8K0965561A

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

€23.95

Part no. 06N145778

Audi A4 B9 A5 F5 A6 A7 C8 A8 D5 Q5 FY Turbocharger Oil Pipe Hose Line 06N145778

€51.95

Part no. 8K0819147

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

€23.95

Part no. 06F145383N

Audi TTS 8J Turbocharger Coolant Pipe Hose Line 2.0 TFSI 06F145383N

€28.95

Part no. 06D145735B

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

€23.95

Part no. 420121233

Audi R8 42 Radiator Support Mount Bracket Left N/S Side 4.2L Petrol 420121233

€28.95

Part no. 8K0121036E-1

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

€37.95

Part no. 8K0121251R

Audi A4 B8 Coolant Radiator Engine Cooling Unit Radiator 8K0121251R

€37.95

Part no. 1K0122101GG

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

€23.95

Part no. 4H0121055AB

Audi A8 D4 3.0 Diesel Coolant Return Line Tube Pipe Hose Right O/S 4H0121055AB

€23.95

Part no. 06H121601P

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

€42.95

Part no. 5Q0122073BK

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

€23.95

Part no. 06H121026N

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

€56.95

Part no. 059145736G

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

€23.95

Part no. 4K0122055AK

Audi A6 C8 Water Coolant Pipe Hose Line 3.0 TDI 4K0122055AK

€23.95

Part no. 6R0122157L

Audi A1 8X Volkswagen Polo 6R Engine Coolant Hose Tube Line Pipe 6R0122157L

€23.95

Part no. 04L121064C

Audi A3 8V Q3 8U Engine Water Coolant Pipe Cooling Hose Line 2.0 TDI 04L121064C

€28.95

Part no. 06K121132

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

€23.95

Part no. 07K121133E

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

€23.95

Part no. 8K0122293AE

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

€23.95

Part no. 059121511CT-1

Audi Q7 4M Q8 Mk2 Water Coolant Hose Line Tube Pipe 3.0 Diesel 059121511CT

€42.95

Part no. 3Q0121070AG

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

€28.95

Part no. 07C121599A

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

€23.95

Part no. 03L906088BD

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

€23.95

Part no. 3C0122101FL

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

€32.95

Part no. 7L0965561-1

Audi Q7 4L VW Touareg Additional Auxiliary Water Coolant Pump 3.0 TDI 7L0965561

€23.95

Part no. 6R0121109AA

Audi A1 8X Volkswagen Polo 6R Water Coolant Pipe Hose Tube Line 6R0121109AA

€28.95

Part no. 03L906088EP

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

€23.95

Part no. 5Q0121203G

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

€42.95

Part no. 6C0122109A

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

€23.95

Part no. 045121011H

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

€23.95

Part no. 8V0121124-1

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

€56.95

Part no. 059121008G

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

€37.95

Part no. 6C0122101E

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

€37.95

Part no. 05E919501

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

€23.95

Part no. 021121031D

Audi TT 8J 3.2 V6 BUB Water Pump Pulley Water Wheel Guide 021121031D

€37.95

Part no. 4H0122101D

Audi A8 D4 Water Pipe Engine Cooling Coolant Hose Line 3.0 TDI Diesel 4H0122101D

€32.95

Part no. 06F115397H

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

€32.95

Part no. 1K0998262S

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

€23.95

Part no. 03G121071A

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

€37.95

Part no. 1K0121049CA

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

€23.95

Part no. 03C121111T

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

€23.95

Part no. 8E0121070B-1

Audi A4 S4 B7 Upper Coolant Radiator Hose Line Pipe 8E0121070B

€23.95

Part no. 5N0965561A

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

€32.95

Part no. 4F0121283AR

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

€23.95

Part no. 03G121065R

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

€132.95

Part no. 5N0122157AM

Audi Q3 8U Water Pipe Hose Coolant Cooling Line 2.0 TDI Diesel 5N0122157AM

€23.95

Part no. 6C0122073B

Cooling Line VW Polo 6C Audi A1 8X 1.6 TDI Water Coolant Pipe Hose 6C0122073B

€23.95

Part no. 1K0121093CJ

Audi Q3 8U VW Beetle Additional Coolant Pump Bracket Mount Carrier 1K0121093CJ

€23.95

Part no. 4G0145804D

Audi S5 8T Coolant Radiator Air Intake Intercooler 3.0 TFSI Quattro 4G0145804D

€47.95

Part no. 04E121070AC

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

€23.95

Part no. 6R0121093B

Audi A1 8X Additional Coolant Pump Bracket Mount Support Holder 6R0121093B

€23.95

Part no. 4G0121081EL

Audi A6 C7 Rear Breather Line Hose Pipe 4G0121081EL

€37.95

Part no. 03L121132

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

€23.95

Part no. 7L8121070BG

Audi Q7 4L Water Coolant Pipe Hose Line 3.0 TDI 7L8121070BG

€28.95

Part no. 8K0121207B-2

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

€28.95

Part no. 8P4121284B

Audi A3 8V Front Right O/S Radiator Air Duct Guide Bumper 8P4121284B

€23.95

Part no. 8K0959501F

Audi A4 B8 Radiator Fan Relay Radiator Electrical Module Control Unit 8K0959501F

€28.95

Part no. 5N0121086D

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

€28.95

Part no. 7L8122051B

Audi Q7 4L VW Touareg 7L 4.2 TDi Coolant Hose Water Pump Pipe 7L8122051B

€32.95

Part no. 1K0121205AB

Audi TT 8J Engine Cooling Radiator Fan Shroud Coolant Panel 1K0121205AQ

€32.95

Part no. 07K121061B

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

€32.95

Part no. 8K0121003AG-1

Audi A6 C7 Radiator Cooling Fan Shroud Housing 1.8 TFSI Petrol 8K0121003AG

€156.95

Part no. 8J0121283A

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

€23.95

Part no. 059121008K

Water Pump Audi A5 8T A6 C7 A8 D4 3.0 TDI Coolant Circulation Unit 059121008K

€23.95

Part no. 8K0121055L

Audi A4 B8 Water Hose Cooling Coolant Radiator Pipe Line Diesel 8K0121055L

€28.95

Part no. 07K121111C

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

€332.95

Part no. 8K0121101P

Audi A4 B8 2.0 TDI Diesel Water Pipe Engine Cooling Coolant Hose Line 8K0121101P

€23.95

Part no. 7L0959455C

Audi Q7 Volkswagen Touareg Radiator Fan Blade Motor 7L0959455C

€32.95

Part no. 8K0959455G

Audi A4 B8 A5 8T Electric Motor Fan Engine Cooling Radiator 8K0959455G

€28.95

Part no. 1K0122447ED-1

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

€23.95

Part no. 1K0122063J

Audi TT 8J A3 8P Skoda Octavia II 2.0 TFSI Water Coolant Pipe Hose 1K0122063J

€23.95

Part no. 8K0122101J

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

€28.95

Part no. 8K0121003P

Audi A4 B8 Q5 8R Engine Cooling Radiator Fan Shroud Coolant Panel 8K0121003P

€94.95

Part no. 5N0122109AH

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

€32.95

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