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 B6 4.2 Petrol Coolant Pipe Cooler Water Hose 079121065M

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0122109AS

Audi A3 8P Engine Water Coolant Pipe Hose Line 1.4 TFSI CAXC Petrol 1K0122109AS

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4K0145919P

Audi A6 C8 Expansion Tank Water Coolant Pipe Hose Line 50 TFSIe 4K0145919P

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0122096J

Seat Leon II VW Golf MK5 Audi A3 8P Water Hose Coolant Pipe Petrol 1K0122096J

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8W0819376E

Audi A4 B9 A5 F5 Water Hose Cooling Coolant Pipe Line 3.0 TFSI Petrol 8W0819376E

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06J121497J

Audi TT 8J Turbine Lubrication Inlet Oil Feed Line Pipe 06J121497J

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K1819376J

Audi A5 8T 2.0 TFSI Water Hose Cooling Coolant Radiator Pipe Line 8K1819376J

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8R0121081AQ

Audi Q5 8R Expansion Coolant Radiator Hose Pipe Tube Line Cooling 8R0121081AQ

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121131J

Audi A8 D4 Q7 4L Coolant Hose Line Tube Pipe 3.0 TDI 059121102C 059121053J

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4K0145934L

Audi A6 C8 Water Coolant Pipe Hose Line 50 TFSIe 4K0145934L

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 079121083H

Audi A7 4G 4.0 TFSI Coolant Hose Engine Water Pipe Front Left N/S 079121083H

€37.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 4G0819377K

Audi A6 A7 C7 3.0 TDI Coolant Water Hose Pipe Line Tube 4G0819377K

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0122051AE

Audi A4 B7 Water Hose Cooling Coolant Radiator Pipe Line 1K0122051AE

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0121049Q

Audi A6 C7 A7 4G Water Radiator Coolant Pipe Hose Tube Line 3.0 TFSI 4G0121049Q

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0819374R

Audi A6 Allroad A7 4G8 Sportback Heater Coolant Hose Pipe Line Tube 4G0819374R

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0122101H

Audi A3 8V Water Coolant Hose Line Pipe Tube 1.4 TFSI Petrol CMBA 5Q0122101H

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4K0819374AC

Audi A6 C8 Engine Water Coolant Pipe Hose Cooling Line Tube 50 TFSIe 4K0819374AC

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06K121065Q

Audi TT FV Water Coolant Pipe Hose Line 06K121065Q

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8R0121049P

Audi Q5 8R Water Coolant Pipe Hose Line Connector 2.0 TDI 8R0121049P

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6C0122447K

Audi A1 8X Polo 6C Water Coolant Hose Pipe 1.4 TSI TFSI 6C0122447K

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0121207AT

Audi A3 8P Diesel Engine Cooling Shroud Blade Radiator Coolant Fan 1K0121207AT

€42.95

Free delivery: Sep 22 – 24

If paid before 14:00

Part no. 5Q0122073L

Audi A3 8V Engine Water Coolant Pipe Tube Line Hose 1.4 TFSI Petrol 5Q0122073L

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8V0121073

Audi RS3 8V Water Pipe Hose Line Engine Cooling Coolant Unit Hose 8V0121073

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06H121601N

Audi A4 B9 A5 8T Additional Water Pump Engine Coolant Unit 06H121601N

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0121214AC

Audi A6 A7 4G8 Radiator Coolant Reservoir Bracket Mount Upper Front 4G0121214AC

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0121214AF

Audi A6 C7 Radiator Coolant Reservoir Bracket Mount Lower Front 4G0121214AF

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04E122157H

Turbocharger Cooling Line VW Golf MK7 Audi A3 8V 1.4 TSI Water Pipe 04E122157H

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5N0122447BD

Audi Q3 8U Water Coolant Cooling Pipe Hose Line 2.0 TDI Diesel 5N0122447BD

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 07K965561B-1

Audi RS Q3 8U Engine Auxiliary Water Coolant Pump 2.5 TFSI 07K965561B

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0819377AA

Audi A5 8T Water Hose Cooling Radiator Coolant Pipe Line 8K0819377AA

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0121214AE

Audi A6 C7 Radiator Coolant Reservoir Bracket Mount Upper Front 4G0121214AC

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0122157AT

Audi A3 8V VW Golf 5G Engine Water Coolant Tube Pipe 1.4 TFSI Petrol 5Q0122157AT

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7H0819617

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0816743AP

Audi S6 C7 A7 Refrigerant Hose Pipe Line 4G0816743AP

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8R0121284H

Audi Q5 8R Cooling Radiator Guide Mount Bracket Right O/S 8R0121284H

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06K103495AS

Audi A4 B9 A5 F5 Engine Oil Separator Breather Petrol 2.0 TFSI DDWA 06K103495AS

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8W0122055CA-1

Audi A4 B9 A5 F5 Engine Water Coolant Pipe Hose Line 2.0 TDI 8W0122055CA

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0819350D

Audi A4 B8 A5 8T Coolant Cooling Hose Pipe Line Tube 2.0 TDI 8K0819350D

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 03L121071

Audi A4 B8 A5 8T A6 C6 Water Coolant Cooling Pipe Hose Line 2.0 TDI 03L121071

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7L8121058

Audi Q7 4L 4.2 TDI Coolant Hose Radiator Pipe Water Cooling Line 7L8121058

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0906088

Audi A5 8T 3.0 TDI CLAB Diesel Temperature Exhaust Gas Sensor A8K0906088

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0819374M

Audi A6 C7 A7 4G Heater Coolant Cooling Hose Pipe Line 4G0819374M

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0122101BP-1

Audi A3 8V Water Coolant Radiator Pipe Hose Line 2.0 TDI 5Q0122101BP

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5G0965561

Audi A3 8V 1.4 TFSI CXSA Additional Auxiliary Water Pump 5G0965561

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G1819350AT

Audi A6 C7 A7 4G Heater Coolant Cooling Hose Pipe Line 4G1819350AT

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0133366BB

Audi A3 8P A4 B7 Golf Mk6 Water Coolant Pipe Hose Line 2.0 TSI 1K0133366BB

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8J0121447E

Audi TT 8J Engine Coolant Vent Hose Pipe 2.0 TDI Diesel CBBB 8J0121447E

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0816743D

Audi A3 8V VW Golf Mk7 Air Conditioning Hose A/C Pipe Line 5Q0816743D

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8U0121485

Audi RSQ3 8U Front Water Coolant Pipe Hose Line Tube 2.5 TFSI 8U0121485

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 05L122157CD

Audi A5 F5 Engine Coolant Hose Tube Line Pipe 2.0 TDI Diesel DTNA 05L122157CD

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121598AB

Audi A8 D4 Engine Water Coolant Pipe Hose Line Feed 3.0 TDI 059121598AB

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8N0422891E

Audi TT 8N Power Steering Rack Return Oil Hose Pipe Line 3.2 Quattro 8N0422891E

€85.95

Free delivery: Sep 22 – 24

If paid before 14:00

Part no. 8W0122291AK

Audi A4 B9 35 TFSI DMSB Petrol Water Coolant Hose Line Tube Pipe 8W0122291AK

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121111L

Audi A4 B7 2.7 TDI BPP Diesel Engine Thermostat Housing 059121111L

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06L145735J

Audi A4 B8 A5 F5 Turbine Lubrication Oil Return Pipe 2.0 TFSI 06L145735J

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8J0121124A

Audi RS3 8P Gearbox Oil Cooler Coolant Pipe Hose Line 2.5 TFSI CEPA 8J0121124A

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0819337

Audi A6 C7 3.0 TFSI Water Coolant Pipe Hose Line 4G0819337

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0122051HD-1

Audi A3 8P VW Scirocco Mk3 2.0 TDI Diesel Radiator Coolant Hose 1K0122051HD

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0121203G

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

€75.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121507M

Audi A4 S4 8K A5 S5 8T Engine Coolant Pipe Hose Tube Line 059121507M

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121465B-1

Audi A4 B8 A5 8T A6 C7 Q7 4L Coolant Pipe Water Hose 3.0 TDI 059121465B

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6R0121070N

Audi A1 8X Engine Coolant Water Pipe Hose Line 1.6 TDI CAYC 6R0121070N

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0121407A

Audi A3 8V Engine Coolant Water Expansion Tank Bottle 5Q0121407A

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8W0121405F

Audi A5 F5 Expansion Coolant Tank Bottle 8W0121405F

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06H121497F

Audi A4 B8 A5 8T Turbocharger Coolant Feed Pipe Hose Line 1.8 TFSI 06H121497F

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06F121057C

Audi A1 8X S3 8P VW Golf R Mk5 Water Coolant Pipe Hose Line 2.0 TSI 06F121057C

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5WA907527A

Audi A3 8Y Volkswagen VW Golf Mk8 Interior Temperature Sensor Unit 5WA907527A

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1J0121403B

Audi TT 8N Coolant Expansion Header Tank Bottle Reservoir Cap 1J0121403B

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059117015K

Audi Q7 4M Engine Oil Cooler Radiator 3.0 TDI 059117015K

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5N0122101AT

Audi Q3 8U 2.0 TDI DFTA Engine Radiator Upper Water Coolant Hose 5N0122101AT

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0121292E

Audi A7 4G Engine Radiator Coolant Upper Centre Cover Panel 4G0121292E

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 03L121157AE-2

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6R0129637E

Audi A1 8X Air Filter Box Pipe Pipe Line Hose 1.6 TDI CAYC 6R0129637E

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06J103221-1

Audi TT 8J 1.8 TFSI Tank Breather Ventilation Pipe Line 06J103221

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7L0819857C

Audi Q7 4L Coolant Pipe Hose Line Duct Tube 3.0 TDI 7L0819857C

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8J0121109E

Audi TT Mk2 8J Water Coolant Pipe Hose 1.8 2.0 TFSI CDAA CESA Petrol 8J0121109E

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121399K

Audi SQ5 8R 3.0 TDI Diesel Coolant Hose Line Tube Pipe 059121399K

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 03L121011G

Audi A3 8P TT 8J VW Golf Mk5 Mk6 Water Coolant Pump 2.0 TDI 03L121011G

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 03L121157AD

Audi A4 B8 A5 8T Coolant Pipe Hose 2.0 TDi Diesel EGR 03L121157AD

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0122101GK

Audi A3 8V Water Coolant Hose Line Pipe Tube 1.5 TFSI DADA 5Q0122101GK

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0122293CA

Audi A4 B8 A6 C7 2.0 TDI Water Coolant Pipe Hose Line Tube 4G0122293CA

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04L122157BA

Audi A5 8T Heater Water Cooling Coolant Pipe Hose Line 04L122157BA

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121016C

Audi A4 B9 A6 C7 A7 4G Q7 4M Engine Water Coolant Pump 3.0 TDI 059121016C

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0145923F

Audi A4 S4 B8 S5 8T Radiator Coolant Hose Tube Pipe Line 8K0145923F

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0965561E

Audi A3 8V 8Y VW Caddy SB Passat 3J Electric Coolant Water Pump 5Q0965561E

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8W0121207

Audi A4 B9 35 TFSI DMSB Motor Radiator Fan Engine Cooling Motor 8W0121207

€237.95

Free delivery: Sep 22 – 24

If paid before 14:00

Part no. 4K2819377E-2

Audi A6 C8 Engine Cooling Water Pipe Coolant Hose Line Tube 4K2819377E

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 03C121070B

Audi A3 8P Water Pipe Hose Line Engine Cooling Coolant Unit Hose 03C121070B

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6R0121207F

Audi A1 8X Engine Cooling Radiator Fan Shroud Panel 6R0121207F

€218.95

Free delivery: Sep 22 – 24

If paid before 14:00

Part no. 4G0819350B

Audi A6 C7 A7 4G8 Water Radiator Coolant Pipe Hose Tube Line Petrol 4G0121485T

€23.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 8U0121056

Audi RS Q3 8U Radiator Coolant Hose Pipe Line 8U0121056

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06F115397H-1

Audi A4 B7 VW Golf Mk5 Oil Filter Housing Oil Cooler 2.0 TFSI Petrol 06F115397H

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06E117021J

Audi A5 S5 8T Engine Oil Cooler Heat Exchanger Unit 3.0 Petrol Engine 06E117021J

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4M0819350F

Audi Q7 4M Q8 Mk2 VW Touareg Mk3 Water Coolant Hose Line Tube Pipe 4M0819350F

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7L8122051B

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

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0121403G

Audi A4 B8 A5 8T Q5 2.0TDI Coolant Reservoir Expansion Tank Bottle 8K0121403G

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04L122157BC

Audi A5 8T Heater Water Cooling Coolant Pipe Hose Line 04L122157BC

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

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