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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 4G0122055D

Audi A6 C7 Engine Coolant Pipe Hose Tube Line 2.0 Diesel CNHA 4G0122055D

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 5Q0121599AA-1

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

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 059130299AS

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

€28.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 1J0121444EF

Audi TT 8N A3 8L Seat Leon 1M Golf Mk4 Coolant Hose Pipe Line Petrol 1J0121444EF

€32.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 6C0122051P

Audi A1 8X Volkswagen Polo 6C Water Coolant Hose Pipe 1.0 TFSI 6C0122051P

€80.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 06H121026DR

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

€47.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 10 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 6C0122101T

Audi A1 8X Volkswagen Polo 6C Engine Water Coolant Pipe Hose 1.0 TFSI 6C0122101T

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06L133607G

Audi A6 C8 A7 4K Q7 4M VW Touareg Air Pump Breather Pipe Hose 2.0TFSI 06L133607G

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0121052C

Audi A4 S4 B8 A5 8T Engine Water Coolant Pipe Hose Tube Line 8K0121052C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 059121445L

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 03L121065T

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 06H965561

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03G906088AT

Audi A3 8P Exhaust Gas Temperature Sensor 03G906088AT

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 03L121111AC

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 1K0121070BD

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

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0121096BQ

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8R0819334AP

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 5N0122063D

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

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K0819552C

Audi A6 C8 Coolant Hose Water Line Pipe Tube 4K0819552C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0819374Q

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

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8U0121036

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

€28.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 6C0122049A

Volkswagen Polo 6C Audi A1 8X Radiator Coolant Hose Pipe 1.0 TFSI 6C0122049A

€28.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8K0121081AT

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06H145735G

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8J0121051L

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

€32.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 1K0121096AQ

Audi A3 8P Engine Coolant Hose Tube Line Pipe 1.6 Petrol BSE 1K0121096AQ

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0121051B

Audi S3 8V VW Golf Mk7 Water Pipe Hose Engine Coolant Line 1.6 TDI 5Q0121051B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0121096BH

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 6C0122157K

Audi A1 8X Volkswagen Polo 6R Water Coolant Pipe Hose 1.0 TFSI 6C0122157K

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 057906088A

Audi Q7 4L Exhaust Gas Temperature Sender Module Unit Plug Right O/S 057906088A

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 2Q0121407B

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 7L0965561

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03C121065L

Audi A1 8X Petrol Water Coolant Hose Pipe 03C121065L

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8U0121109

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0805201

Audi A4 B8 A5 8T Radiator Support Mount Holder Left Right N/O/S 8K0805201

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0819334F

Audi A4 B9 35 TFSI Water Hose Cooling Radiator Coolant Pipe Line 8W0819334F

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8E0959455H

Audi S4 B7 4.2 Petrol Engine Cooling Radiator Coolant Fan Right O/S 8E0959455H

€28.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. 8E0121207F

Audi A4 B7 Seat Exeo Radiator Engine Coolant Fan Shroud Housing 8E0121207F

€75.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. 04L121026R-1

Audi A5 8T 2.0 TDI CNHA Thermostat Housing Pipe Hose Line Tube 04L121026R

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1J0122291C

Audi A1 8X A3 8P 8V Skoda Octavia Water Coolant Pipe Hose Line 1J0122291C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0819350A

Audi RS4 B8 4.2 FSI CFSA Coolant Hose Pipe Line Tube 8K0819350A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 038121011G

Audi A3 8P Volkswagen Eos 1F Water Pump Module Unit Mechanism 038121011G

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0906457C

Audi A3 8V A3 8Y A5 B10 A6 C8 A7 4K Water Cooler Pump Control Valve 5Q0906457C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 05E919501

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 07K121109A

Audi RS Q3 8U Engine Water Coolant Pipe Hose Line Tube 2.5 TFSI 07K121109A

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 05L122157CP

Audi A5 F5 Engine Coolant Pipe Hose Tube Line 2.0 TDI Diesel 05L122157CP

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04L122157BQ

Audi A5 8T 2.0 TDI CNHA Water Coolant Pipe Line Hose Tube 04L122157BQ

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 059121511G

Audi A5 8T Coolant Pipe Water Hose Cooling Line 2.7 TDI Diesel 059121511G

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8J0121447D

Audi TT 8J 2.0 Petrol Engine Coolant Pipe Hose Line Tube 8J0121447D

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0122101H

Audi A4 B9 2.0 TDI Diesel Coolant Water Hose Line Tube Pipe 8W0122101H

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2Q0965567B

Audi A3 8V Additional Water Coolant Pump 2Q0965567B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06J145771D

Audi TT 8J 1.8 TFSI CDAA High Pressure Oil Feed Pipe Hose Line Tube 06J145771D

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0121251EC

Audi Q2 GA Coolant Radiator Engine Cooling Unit Radiator 1.6 TDI 5Q0121251EC

€75.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. 8W0819370C

Audi A4 B9 Water Hose Cooling Coolant Radiator Pipe Line 2.0 Petrol 8W0819370C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04L121065

Audi A3 8V Engine Water Coolant Pipe Cooling Hose Line 04L121065

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0145921Q

Audi S5 8T 3.0 TFSI Radiator Upper Hose Line Pipe Left N/S 8K0145921Q

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0819374Q-1

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

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06H115243F

Audi A5 8T 2.0 TFSI CDNB Oil Pressure Control Valve Adjuster Unit 06H115243F

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2Q0121407

Audi A1 GB Coolant Header Expansion Tank Reservoir Bottle 2Q0121407

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8J0121101C-1

Audi TT 8J 2.0 TFSI Water Hose Cooling Coolant Radiator Pipe Line 8J0121101C

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8N0121051E

Audi TT 8N S3 8L Water Hose Coolant Radiator Pipe Line 1.8 Petrol 8N0121051E

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K0121405N

Audi A6 C8 Coolant Expansion Reservoir D Cooling Agent Tank Radiator 4K0121403

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5N0129637D

Audi A3 8P Q3 8U Air Filter Box Water Coolant Drain Pipe Hose Line 5N0129637D

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06E121161BB

Audi A5 8T 3.0 TFSI V6 Engine Coolant Flange Housing Cover Trim 06E121161BB

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7L0959455D

Audi Q7 Volkswagen Touareg 7L Radiator Fan Blade Motor 7L0959455D

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

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