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 Exhaust Gas Temperature Sensor Unit Diesel Engine 03G906088AP

€28.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 7L8122096A

Audi Q7 4L Water Coolant Pipe Hose Line 3.0 TDI 7L8122096A

€51.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 6R0122101DJ-1

Audi A1 S1 8X Water Coolant Pipe Hose Line 2.0 TFSI 6R0122101DJ

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8P0820741A

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

€47.95

Free delivery: Sep 22 – 24

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: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 5Q0121070BR

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

€61.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0121055L-1

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0819334AD

Audi A4 B8 Heating Auxiliary Heater Pipe Hose Line 8K0819334AB

€23.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 8E0965557A

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04E121064E

Audi A3 8V Q3 8U VW Golf 5G Scirocco Mk3 Coolant Pipe Hose Tube Line 04E121064E

€23.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 4G0121403G

Audi A6 C7 Expansion Overflow Coolant Reservoir Bottle Tank 4G0121403G

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04L121064T-1

Audi Seat Volkswagen Skoda Engine Coolant Pipe Hose Line 04L121064T

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 03G121065R

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

€132.95

Free delivery: Sep 23 – 24

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: Sep 22 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 06J133781BE

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

€23.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 079121085Q

Audi S6 C7 S7 4G Water Coolant Pipe Hose 4.0 TFSI Petrol 079121085Q

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 032121142

Audi A3 8P A4 B7 VW Golf MK5 Passat B6 Coolant Temperature Sensor Clip 032121142

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7L8121058C

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 420260712B

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

€37.95

Free delivery: Sep 22 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 6R0122109L

Audi S1 8X VW Polo GTI Mk5 Water Coolant Pipe Hose Line 2.0 TFSI 6R0122109L

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 079115201C

Audi RS4 B8 RS5 8T Oil Cooler Line Thermostat 4.2 FSI 079115201C

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0122291H

Audi A3 8P VW Golf MK5 Caddy 2K Water Coolant Hose Pipe Line 2.0 TDi 1K0122291H

€23.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 8E0121251L

Audi A4 B6 B7 Coolant Radiator Rad Cooling Unit 1.9 TDi 8E0121251L

€32.95

Free delivery: Sep 22 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 079131605BB

Audi S6 C7 S7 4G Secondary Air Pump Connecting Pipe Line Hose 079131605BB

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6R0122051BP

Audi Seat Skoda VW Radiator Coolant Hose Pipe Line 2.0 TFSI 6R0122051BP

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0122051FE

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 057121057

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0121207A-5

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

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0121251AB

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

€32.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 06K121075AR

Audi Q3 8U VW Beetle Scirocco Mk3 Coolant Pipe Water Cooling Hose 06K121075AR

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0959455M

Audi A4 B8 Radiator Fan Engine Cooling Cooler Blower Unit 8K0959455M

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8P0122051

Audi RSQ3 8U Cooling System Water Coolant Hose Pipe Line 2.5 TFSI 8P0122051

€70.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06H121026AG

Audi A3 8P VW Passat B7 Water Pump Thermostat Coolant Regulator 06H121026AG

€51.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 8W0121674B

Audi A4 B9 Radiator Air Guide Duct Channel Cover Panel Right O/S 8W0121674B

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06K121059K

Audi Q3 8U VW Beetle 5C Water Coolant Hose Pipe Line 06K121059K

€28.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 04L122157BJ

Audi A5 S5 8T A6 S6 4G Engine Coolant Hose Tube Line Pipe 2.0 TDI 04L122157BJ

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06E121044D

Audi S4 B8 Engine Coolant Pipe Water Hose Line 3.0 TFSI CAKA 06E121044D

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06D121085

Audi A4 B7 2.0 TFSI BGB Turbo Water Coolant Hose Line Tube Pipe 06D121085

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0145919C

Audi A4 B8 2.0 TDI CNHC Engine Water Coolant Hose Pipe Line 8K0145919C

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1J0121321B

Audi TT 8N Radiator Water Coolant Expansion Tank Cap Cover 1J0121321B

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059122445F

Audi Q7 Q8 4M 3.0 TDI Engine Coolant Hose Line Tube Pipe 059122445F

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06E121018A

Audi Q5 8R Auxiliary Water Pump Coolant Circulation Cooling Unit 06E121018A

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121064D-1

Audi A5 8T Water Hose Cooling Coolant Radiator Pipe Line 3.0 TDI 059121070J

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6R0122073H

Audi A1 S1 8X VW Polo 6R Seat Ibiza 6P Engine Water Coolant Hose 6R0122073H

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6R0122101AQ

Audi A1 8X Coolant Cooling Engine Pipe Hose Line Radiator 6R0122101AQ

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06M121085H

Audi A4 S4 B9 VW Touareg Water Coolant Pipe Hose Line 06M121085H

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0121030K

Audi A4 B8 Water Hose Radiator Coolant Pipe Line 1.8 2.0 Petrol 8K0121030K

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0819334BB

Audi A4 B8 2.0 TDI CNHC Water Coolant Hose Line Pipe 8K0819334BB

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4H0121485AA

Audi A8 D4 3.0 TDI Diesel Engine Water Coolant Pipe Hose Line 4H0121485AA

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06D145778C

Audi A4 B7 2.0 TFSI BGB Oil Supply Feed Hose Line Pipe Tube 06D145778C

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04L121064AE

Volkswagen Seat Skoda Audi 2.0 TDI Water Coolant Pipe Hose Line 04L121064AE

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 07K121115D

Audi RSQ3 8U Thermostat Housing Coolant Unit 2.5 TFSI Petrol 07K121115D

€142.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0145832AH

Audi A3 8P 2.0 TDI Convertible Intercooler Air Pipe Hose Left N/S 1K0145832AH

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0121485BE

Audi A6 C7 A7 4G8 Water Radiator Coolant Pipe Hose Tube Line Diesel 4G0121485BE

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4H0121449Q

Audi A6 C7 3.0 TDI CLAA Water Coolant Pipe Hose Line Tube 4H0121449Q

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 03L121157AQ

Audi A4 B8 A5 8T 2.0 TDI Water Hose Cooling Radiator Pipe Line 03L121157AQ

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04L121157

Audi A4 B8 A6 C7 Water Coolant Pipe Hose Line Tube Right O/S 2.0 TDI 04L121157

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04L121065AJ

Volkswagen Seat Skoda Audi 2.0 TDI Water Coolant Pipe Hose Line 04L121065AJ

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6C0122109E

Audi A1 8X 1.6 TDI Diesel Engine Water Coolant Pipe Hose Line Tube 6C0122109E

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0121063J

Audi TT 8J Water Coolant Hose Pipe Line Tube 1K0121063J

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0122291BM

Audi A3 8P 2.0 TDI Water Hose Radiator Coolant Pipe Line 1K0122291BM

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 03L906088BD

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0121481AL

Audi A6 Avant A7 Sportback Water Coolant Hose Pipe 4G0121481AL

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04L121111H-1

Audi A4 B8 A5 F5 TT FV Thermostat Coolant Housing Valve 2.0 TDI 04L121111H

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 079121678K

Audi S6 C7 S7 4G Engine Coolant Thermostat Resonator Valve 4.0 TFSI 079121678K

€146.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7L8121051G

Audi Q7 Engine Cooling Radiator Coolant Hose Pipe 3.0 TDI 7L8121051G

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4F0121403C

Audi A6 C6 A6 S6 4F Coolant Header Tank Reservoir Expansion Bottle 4F0121403C

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04L121026AF

Audi Q2 GA Diesel Thermostat Coolant Regulator Connector Pipe Hose 04L121026AF

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0959455K

Audi A5 S5 8T Engine Cooling Radiator Fan Shroud Panel 8K0959455K

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 80A145926BP

Audi Q5 FY Coolant Hose Tube Line Pipe 2.0 Diesel 80A145926BP

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 07K121055A

Audi RS3 8P RSQ3 8U Engine Cooling System Coolant Hose Pipe 2.5 TFSI 07K121055A

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 03G145771Q

Audi A3 8P Diesel Engine Supply Feed Oil Hose Line Tube Pipe 03G145771Q

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06K145778K

Audi Q3 2.0 TFSI CULB Oil Pipe Line Tube Hose 06K145778K

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04E121600AR

Audi A1 8X Skoda Octavia Mk3 Coolant Cooling Water Pump 1.0 TSI TFSI 04E121600AR

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0122101B

Audi A6 C7 3.0 TDI Diesel Radiator Upper Hose Line Pipe Left N/S 4G0122101B

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 079121013

Audi S7 4G Water Pump Coolant Cooling Unit 079121013

€89.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 3C0122073EG

Audi TT Mk2 8J Water Coolant Pipe Hose Line 2.0 TFSI 3C0122073EG

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8W0122055BD

Audi A4 B9 A5 F5 Water Coolant Radiator Pipe Hose Line 3.0 TDI 8W0122055BD

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0121207B-3

Audi A5 8T Engine Cooling Radiator Coolant Fan Air Flap Ring AD1261 993332N

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 079121010B-1

Audi S6 C7 S7 4G S8 D4 Water Coolant Pump Cover Lid 4.0 TFSI Petrol 079121010B

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8W0122101B

Water Hose Audi A4 B9 A5 F5 Cooling Coolant Radiator Pipe Line 8W0122101B

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06K103495BL

Audi A3 8V A4 B9 Engine Oil Separator Breather Petrol 2.0 TFSI DNUE 06K103495BL

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06K121075AS

VW Polo 6C GTI Audi S1 8X 1.8 2.0 TFSI Water Coolant Pipe Hose Line 06K121075S

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

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