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

€51.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 4G0819374M

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

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0959455G

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

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0121109H

Audi A5 8T Water Hose Cooling Coolant Radiator Pipe Line 2.0 TDI 8K0121109H

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 078133753A

Audi RS4 B7 Jet Pump Intake Vacuum System Pipe Hose Line 4.2 FSI 078133753A

€80.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5G0965561

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

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0907659

Audi A4 B8 A5 8T AUC Sensor Interior Air Quality Unit 8K0907659

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 10 – 13

If paid before 14:00

Part no. 8E0121251C

Audi A4 B7 Water Coolant Radiator Manual Petrol 3.2 FSI 8E0121251C

€32.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 059121111L

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8J0121124A

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

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G0819337

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0121203G

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

€42.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8K0121055L

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

€28.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 5Q0121407A

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 059121008A

Audi A7 4G8 Water Pump Wheel Coolant Unit 3.0 TDI Diesel 059121008A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0121405F

Audi A5 F5 Expansion Coolant Tank Bottle 8W0121405F

€28.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 5WA907527A

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1J0121403B

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 059117015K

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

€32.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 4G0121292E

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 04L122157BA

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8W0819337

Audi A4 A5 S5 F5 Engine Coolant Hose Pipe Line Tube 8W0819337

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 4G0121081AF

Audi A6 C7 Expansion Bottle Coolant Tank Hose Pipe Tube Line 4G0121081AF

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 6R0121207F

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

€218.95

Free delivery: Nov 10 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8U0121056

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

€28.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 04L122157BC

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

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8N0121096H

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

€56.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 1K0122101CK

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 06J133519A

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 07K971845A

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K2121214E

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 4G0145920C

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8N0121073A

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

€56.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 7L0959455C

Audi Q7 Volkswagen Touareg Radiator Fan Blade Motor 7L0959455C

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K0121071J-1

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

€32.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 4G0121601A

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

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04L121026F

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 079121137M

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 04L121131AD

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 6C0121109B

Audi A1 8X Volkswagen Polo 6C Water Coolant Pipe Hose 1.0 TFSI 6C0121109B

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 059121447N

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5N0122051CD

Audi Q3 8U Coolant Hose Pipe Line Tube Quick Release Coupling 5N0122051CD

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06J133781BD

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0122051AF

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

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

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