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 TT 8N TTS Radiator Coolant Hose Tube Line Pipe 8N0121096H

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8E0121049L

Audi A4 B7 2.0 Petrol Water Hose Cooling Radiator Coolant Pipe Line 8E0121049L

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0122101CK

Audi Q3 8U Water Hose Cooling Radiator Coolant Pipe Line 1K0122101CK

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0121447BB

Audi A6 S6 C7 Engine Water Coolant Pipe Hose Line 4.0 Petrol Engine 4G0121447BB

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06J133519A

Audi TT 8J Water Cooling Coolant Pipe Line Connector Bracket Holder 06J133519A

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 07K971845A

Audi RS Q3 8U Engine Wiring Bracket Holder Support Carrier 07K971845A

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4K2121214E

Audi A6 C8 Radiator Expansion Tank Reservoir Retainer Bracket Support 4K2121214E

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06K109121E

Audi S3 8Y 2.0 TFSI Volkswagen Golf 8 Petrol Water Pump Cover 06K109121E

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0121619D-1

Audi A3 8V Skoda Octavia Mk3 Water Hoses Coolant Pipes Lines 5Q0122051DA

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04L121093G

Audi A4 B9 Additional Coolant Pump Mount Bracket Holder 2.0 TDI 04L121093G

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06H121085C-1

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0145920C

Audi A6 C7 3.0 TFSI Water Coolant Pipe Hose Line 4G0145920C

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7L0965561L-1

Audi A4 B7 2.0 TDI Quattro Auxiliary Additional Water Pump 7L0965561L

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8R0819374D

Audi Q5 8R Coolant Hose Pipe Water Line Tube 2.0 TDI 8R0819374D

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0145921C

Audi A6 C7 Water Hose Cooling Coolant Pipe Line 3.0 TFSI 4G0145921C

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8N0121073A

Audi TT 8N TTS Coolant Hose Tube Line Pipe 8N0121073A

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 057121057C

Audi RSQ3 F3 2.5 TFSI Quattro Water Coolant Pipe Hose Line 057121057C

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0145926

Audi A6 C7 3.0 TFSI Water Coolant Pipe Hose Line Left N/S 4G0145926

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4K0121071J-1

Audi A6 C8 Engine Coolant Hose Pipe Water Line Cooling 4K0121071J

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0121481P

Audi S6 C7 Water Coolant Cooling Hose Pipe Rear Left N/S 4.0 Petrol 4G0121481P

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0121601A

Audi A7 4G8 Additional Auxiliary Water Pump Motor Circulation 4G0121601A

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04L121026F

Audi A3 8V 2.0 TDI DGCA Diesel Engine Coolant Thermostat 04L121026F

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0122101BP

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 079121137M

Audi S6 C7 S7 4G Coolant Pipe Connection Flange Adapter Line 079121137M

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5N0122157AG

Audi Q3 8U 2.0 TFSI Water Pipe Hose Coolant Cooling Line 5N0122157AG

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04L121131AD

Audi A5 8T Water Coolant Flange Pipe Hose Line 04L121131AD

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0121403AH

Audi A6 C7 A7 4G Water Coolant Expansion Tank Reservoir 3.0 TDI 4G0121403AH

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121064B

Audi A4 S4 B8 A5 S5 8T Engine Cooling Radiator Hose Tube Pipe Line 059121070A

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06F121132G

Audi S3 8P 2.0 TFSI CDLA Coolant Flange Pipe Hose Line 06F121132G

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059103482H

Audi A4 B9 Q7 4M Engine Oil Filler Pipe Neck Hose Line Tube 059103482H

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06E121016Q

Audi A4 B8 A6 C7 A8 D3 Cooling Fluid Coolant Pump 3.0 Petrol Engine 06E121016

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121447N

Audi A6 C8 Engine Coolant Water Pipe Return Line Tube Hose 059121447N

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06J133781BD

Audi TT 8J Water Hose Cooling Radiator Coolant Pipe Line 06J133781BD

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0122051AF

Audi Seat Skoda VW Water Coolant Hose Pipe Line Water Coolant 5Q0122051AF

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06Q121065C

Audi S3 8Y Volkswagen Golf Mk8 Water Coolant Pipe 2.0 TFSI 06Q121065C

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8W0121400B-1

Audi A4 B9 A5 F5 Engine Oil Coolant Hose Pipe Line Tube 8W0121400B

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04L122157BE

Audi A5 8T 2.0 TDI CNHA Water Coolant Pipe Tube Line Hose 04L122157BE

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0121056J

Audi A6 S6 C7 Water Coolant Cooling Hose Pipe Rear Left N/S 4.0 Petrol 4G0121056

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0122063G

Audi S3 8P 2.0 TFSI CDLA Petrol Engine Water Coolant Pipe Hose Line 1K0122063G

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 079121127E

Audi RS6 C7 RS7 4G Coolant Flange Adapter Cooling Pump Pipe Hose 4.0L 079121127E

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0121599AA-1

Skoda Octavia RS VR Auxiliary Water Pump Coolant Circulation Cooling 5Q0121599AK

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059130299AS

Audi A4 B9 Q7 4M Fuel Line Pressure Sensor Pipe Hose 3.0 TDI Diesel 059130299AS

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121449N

Audi A4 B9 A5 F5 A6 C8 3.0 TDI Coolant Water Pipe Hose Tube Line 059121449N

€23.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 5Q0121058AE

VW Polo GTI AW Audi A3 8V Water Hose Cooling Coolant Pipe 2.0 TFSI 5Q0121058AE

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06E131831S

Audi A4 B8 A5 8T A6 C7 A7 4G Engine Water Coolant Hose Pipe 3.0 TFSI 06E131831S

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06H121026DR

Audi A5 8T 2.0 TFSI CDNB Petrol Engine Water Pump 06H121026DR

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121065DT

Audi SQ5 8R 3.0 TDI CGQB Radiator Water Hose Line Tube Pipe 059121065DT

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8X0121332

Audi A1 8X Radiator Air Duct Cover Panel Seal Right O/S 1.2 TFSI 8X0121332

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4M0819927C

Audi Q7 4M Water Coolant Hose Tube Line Pipe 3.0 TDI Diesel Set 4M0819927C

€80.95

Free delivery: Sep 22 – 24

If paid before 14:00

Part no. 4F0121109AN

Audi A6 C6 Radiator Top Hose Pipe Line 2.7 3.0 Diesel 4F0121109AN

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0122293BF

Audi A6 RS6 C7 Radiator Coolant Hose Adapter Rear Left N/S 4G0122293BF

€80.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0819334E

Audi A4 B8 Heat Exchanger Heater Pipe Hose Line 2.0 TDI 8K0819334E

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121445L

Audi A6 C8 Engine Cooling Coolant Water Hose Line Pipe Tube 059121445L

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0122063

Audi A3 8V Water Coolant Pipe Radiator Hose Fluid Line 1.4 TSI Petrol 5Q0122063

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 03L121065T

Audi A3 8P 2.0 TDI Hose Thermostat Coolant Pipe Line 03L121065T

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 83A816738

Audi Q3 RSQ3 F3 Petrol Hose Air Con A/C Intercooler Pipe Line 83A816738

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121103H

Audi SQ5 8R 3.0 TDI CGQB Coolant Hose Line Tube Pipe 059121103H

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6C0121407

Audi A1 8X 1.6 TDI Expansion Tank Water Coolant Bottle Reservoir 6C0121407

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06H965561

Audi A5 8T 2.0 TFSI CDNB Additional Auxiliary Water Pump 06H965561

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 03G906088AT

Audi A3 8P Exhaust Gas Temperature Sensor 03G906088AT

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 059121511CK

Audi A6 C8 Auxiliary Water Pump Engine Coolant Hose Line Pipe Tube 059121511CK

€94.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 3Q0121058C

Audi Q3 F3 Water Hose Cooling Radiator Coolant Pipe Line 2.0 TDI 3Q0121058C

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 03L121111AC

Audi A3 8P 2.0 TDI Diesel Thermostat Coolant Housing 03L121111AC

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0121081BB

Audi A4 S4 B8 A5 8F Radiator Coolant Tank Hose Pipe Line Tube 8K0121081BB

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8N0121088

Audi A3 8L TT TTS 8N Engine Coolant Water Hose Pipe Tube Line 8N0121088

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06L121012L

Audi A4 B9 Volkswagen Golf 8 2.0 TFSI Thermostat Coolant Water Pump 06L121012L

€75.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0121070BD

Audi TT 8J Water Hose Cooling Tank Coolant Pipe Line 1K0121070BD

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0121096BQ

Volkswagen Golf Mk6 Water Hose Cooling Radiator Coolant Pipe Line 1K0121096BQ

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8J0121123

Audi RSQ3 8U Engine Water Coolant Pipe Hose Line 2.5 TFSI 8J0121123

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8R0819334AP

Audi Q5 8R Water Coolant Pipe Hose Line Tube 8R0819334AP

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8W0121400B-2

Audi A4 B9 A5 F5 Gearbox Oil Coolant Hose Pipe Line Tube 8W0121400B

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5N0122063D

Audi Q3 8U Electric Water Pump Additional Coolant Pump 5N0122063D

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4K0819552C

Audi A6 C8 Coolant Hose Water Line Pipe Tube 4K0819552C

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0819374Q

Audi A5 8T Water Hose Cooling Radiator Coolant Pipe Line 8K0819374Q

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0121049L

Audi A7 4G 3.0 TDI CDUD Water Radiator Coolant Pipe Hose Tube Line 4G0121049L

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8U0121036

Audi RS Q3 8U Engine Coolant Hose Pipe Hose Tube Line 8U0121036

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0122101DK-2

Audi A3 S3 TT 8J CDLA Upper Radiator Coolant Hose Line Pipe Tube 1K0122101DK

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04L121131A

Audi A4 B8 A5 8T Water Coolant Flange Pipe Hose Line 2.0 TDI 04L121131A

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4G0122109AA

Audi A6 C7 A7 4G Radiator Water Coolant Pipe Hose Line 3.0 TDI 4G0122109AA

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 04L121131AB

Audi A3 8V 2.0 TDI DGCA Coolant Water Flange Housing Hose Line 04L121131AB

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8W0122449CK

Audi A4 B9 A5 F5 Water Coolant Pipe Hose Line 3.0 TDI 8W0122449CK

€23.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 06H121601P-2

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

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0121081AT

Audi A4 B8 A5 8T Engine Breather Hose Tube Pipe Line 8K0121081AT

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06H145735G

Audi A5 8T 2.0 TFSI CDNB Turbo Oil Return Pipe Line Tube Hose 06H145735G

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06E103217K

Audi A4 B7 Engine Breather Vent Hose Pipe Line 3.2 Petrol 06E103217K

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8J0121051L

Audi A4 B8 TT 8J Radiator Coolant Hose Pipe Cooling Line 8J0121051L

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8W0122073F

Audi A4 B9 2.0 Petrol Engine Automatic Coolant Hose Line Tube Pipe 8W0122073F

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8U0122101

Audi RS Q3 8U Coolant Hose Upper Front With Quick Release Coupling 8U0122101

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0121096BH

Audi A3 8P Water Hose Cooling Radiator Coolant Pipe Line 1K0121096BH

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06K121085M-1

Audi VW Seat Petrol Water Pipe Engine Coolant Hose Line 2.0 TFSI 06K121085M

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06E121044AB

Audi S4 B8 S5 8T Engine Coolant Pipe Water Hose Line 3.0 TFSI 06E121044AB

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 2Q0121407B

Audi A1 GB VW Polo Taigo Coolant Expansion Tank Bottle Reservoir 2Q0121407B

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7L0815985

Audi Q7 4L VW Touareg 7L Auxiliary Heater Coolant Hose Pipe 3.0 TDi 7L0815985

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7L0965561

Volkswagen Touareg 7L Auxiliary Additional Water Pump Diesel Engine 7L0965561L

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06H121065D

Audi A5 8T 2.0 TFSI Water Hose Cooling Radiator Coolant Pipe Line 06H121065D

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 03C121065L

Audi A1 8X Petrol Water Coolant Hose Pipe 03C121065L

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8U0121109

Audi Q3 RSQ3 8U Engine Water Coolant Hose Pipe Cooling Line 8U0121109

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

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