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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Volkswagen Crafter 2E Water Coolant Pipe Hose Line 2.0 TDI 2E0122447H

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03N145735H

Volkswagen Tiguan AD1 Oil Return Pipe Hose Line 2.0 TDI Diesel Engine 03N145735H

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L121111AB

Volkswagen Crafter Water Thermostat Cooling Hoses Pipe 03L121111AB

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122157H

Volkswagen VW Golf Mk5 Radiator Water Coolant Pipe Hose Line 1K0122157H

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7H2820101A

VW Volkswagen Transporter T5 Heater Matrix Radiator A/C 2.5 TDi 7H2820101A

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0121253BB

Seat Leon 1P Radiator Engine Cooling Coolant Water Unit Petrol 1K0121253BB

€28.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. 6X0959455C

VW Volkswagen New Beetle Fan Blower Radiator Cooling 250/60W 345mm 6X0959455C

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04E103464AD

Volkswagen Golf Mk7 Oil Separator Breather 1.5 TSI Petrol 04E103464AD

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5QH815097C

Volkswagen Tiguan Ad1 Coolant Pipe Feed Return Hose Tube Line 5QH815097C

€85.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122101BG

Volkswagen VW Golf Mk5 Water Hose Cooling Coolant Radiator Pipe Line 1K0122101BG

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L121131F

VW Volkswagen Golf 6 VI 1.6 TDI Thermostat Valve Thermostat Housing 03L121131F

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0959455ET-1

Volkswagen Caddy 2K Cooling Radiator Fan Shroud Right O/S 2.0 TDI 1K0959455ET

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6Q0121407B

VW Volkswagen Polo 6R Coolant Reservoir Expansion Tank Fluid Bottle 6Q0121407B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5N0122101AC-1

VW Volkswagen Tiguan 5N Seat Alhambra Water Coolant Pipe Hose Line 5N0122101AC

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0121049CH

VW Volkswagen Golf Mk7 5G Water Coolant Pipe Hose Line 1.5 Petrol 5Q0121049CH

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122101KN

VW Volkswagen Caddy Maxi Engine Radiator Coolant Hose Pipe Line 1K0122101KN

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0121096C

Volkswagen Golf MK5 Engine Water Coolant Pipe Hose 1K0121096C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122063K-1

Seat Leon Volkswagen Golf 6 Audi A1 8X Water Coolant Pipe Hose Line 1K0122063K

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L121111AF

Volkswagen Transporter T5 T6 Coolant Thermostat Housing Box Cover 03L121111AF

€23.95

Free delivery: Nov 12 – 13

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Part no. 03G121113

VW Volkswagen Golf Mk6 5K Coolant Thermostat 2.0 1.6 TDI Diesel Engine 03G121113

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04L121065CP

Volkswagen Caddy Maxi 2k Engine Cooling System Water Pipe Hose Line 04L121065CP

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122101KP-1

Audi Tt 8j VW Golf 1K Water Hose Cooling Coolant Radiator Pipe Line 1K0122101KP

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2K0121157H

Volkswagen Caddy 2K Engine Coolant Hose Tube Line Pipe 2.0 Diesel 2K0121157H

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 038121132D

Audi Seat Skoda VW Golf MKV Coolant Flange Thermostat Housing Flange 038121132D

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2Q0121109B

Volkswagen Polo Mk6 Audi A1 GB Mk2 VW Water Coolant Hose Pipe Line 2Q0121109B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0122051AF-2

VW Audi Seat Skoda Water Coolant Hose Pipe Line 2.0 TSI 5Q0122051AF

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2HJ121045D

VW Volkswagen Amarok NF Coolant Cooling Pipe Hose Line Diesel Engine 2HJ121045D

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0121101AA

Volkswagen Caddy 2k Radiator Coolant Hose Tube Line Pipe 2.0 Diesel 1K0121101AA

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7E0122051E-1

Volkswagen Transporter T5 Coolant Hose Radiator Water Pipe 2.0 TDI 7E0122051E

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122109BE

VW Passat B6 Audi A3 8P Water Hose Radiator Coolant Pipe Line 1K0122109BE

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122101JQ-1

VW Volkswagen Touran 1T Audi A3 8P Coolant Water Hose Pipe Tube Line 1K0122101JQ

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04B121064

Volkswagen VW Polo 6C Water Coolant Pipe Hose Line 1.4 TDI Diesel 04B121064

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7P6121070AK

VW Volkswagen Touareg 7P Gearbox Coolant Pipe Hose Tube 3.0 Diesel 7P6121070AK

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0121096

Volkswagen Golf R 5G Engine Water Coolant Hose Tube Line 2.0 Petrol 5Q0121096

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0122101S

VW Golf Mk7 Audi A3 8V Water Hose Radiator Coolant Pipe Line Diesel 5Q0122101S

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6Q0122051BP

Volkswagen VW Polo 9N 1.2 Water Hose Radiator Coolant Pipe Line 6Q0122051BP

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04L122157S

Volkswagen Tiguan 5N Passat Audi Q2 Q3 Water Coolant Hose Pipe Line 04L122157S

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6R0121070G

VW Volkswagen Polo GTI 6R 1.4 Petrol Engine Coolant Pipe Hose Line 6R0121070G

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0121064AR

Volkswagen VW Golf Mk7 Audi A3 8V Engine Coolant Pipe Hose Line 5Q0121064AR

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122101KN-3

Volkswagen VW Scirocco Mk3 Engine Radiator Coolant Hose Pipe Line 1K0122101KN

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7P6122101N

Volkswagen Touareg 7p R Engine Coolant Hose Tube Line 3.0 Diesel CVVA 7P6122101N

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3AA122109B

Volkswagen Passat B7 Water Coolant Cooling Pipe Hose Line Diesel 3AA122109B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5WA121049J

Volkswagen Caddy SB Water Coolant Hose Pipe Line 5WA121049J

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06L133519B

Volkswagen T-Roc R Golf GTI 5G Holder AKF Valve Bracket Mount Support 06L133519B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0121157BP-1

VW Golf Mk5 Skoda Octavia 1Z Audi A3 8P Coolant Hose Pipe Tube Line 1K0121157BP

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122447DK

VW Golf Mk5 Audi A3 8P Water Hose Radiator Coolant Pipe 1.6 Petrol 1K0122447DC

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7P0129653

Volkswagen Touareg 7P Air Filter Water Drainage Hose Pipe 3.0 V6 TDI 7P0129653

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122051HK

VW Volkswagen Golf 5 6 1.6 2.0 TDI Water Hose Coolant Pipe Line 1K0122051HK

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6R0122101N

Volkswagen Polo 6R 1.2 Petrol Coolant Water Hose Pipe Line Radiator 6R0122101N

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0121070CE

VW Volkswagen Golf 5 6 1.6 2.0 TDI Water Hose Coolant Pipe Line 1K0121070CE

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0122101CL

Skoda Octavia Mk3 Water Hose Radiator Coolant Pipe Line 2.0 TDI 5Q0122101CL

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06F121133G

VW Volkswagen Golf 5 2.0 TSI BWA Petrol Engine Coolant Flange Hose 06F121133G

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0121205AA-1

Volkswagen Caddy Mk3 Audi A3 8P Engine Cooling Radiator Fan 1.9 TDI 1K0121205AA

€32.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. 1K0121407F

Volkswagen Golf Mk6 Expansion Tank Header Coolant Reservoir Bottle 1K0121407F

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04E121600CB

VW Volkswagen Golf 5G 1.0 1.2 1.4 TSI Engine Coolant Water Pump 04E121600CB

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06A919501A

VW Volkswagen Transporter T5 Water Coolant Temperature Sensor Control 06A919501A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03H121096B

VW Volkswagen Passat CC Cooling System Coolant Hose Pipe Line 3.6 FSI 03H121096B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3C0121070AC

VW Passat CC Engine Water Coolant Cooling Hose Pipe 3.6 FSI Petrol 3C0121070AC

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 022121111G

Volkswagen Touareg 7L Coolant Thermostat Housing Assembly 022121111G

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06A121132R

VW Volkswagen New Beetle 1.6 BFS Water Coolant Flange 06A121133AC

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0121049AN

VW Volkswagen Golf R Mk7 Water Coolant Pipe Tube Line Hose 2.0 TFSI 5Q0121049AN

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2K5122157

Volkswagen Caddy 2k Engine Coolant Water Pipe Hose Line 2K5122157

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0122058E

Volkswagen Golf GTD 5G Engine Coolant Hose Pipe Tube 2.0 TDI CUNA 5Q0122058E

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06L121111H

VW Volkswagen Golf 5G 2.0 TFSI CHHA Thermostat Coolant Housing Pump 06L121111H

€85.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0121070BT

VW Volkswagen Polo AW Mk6 Water Hose Engine Coolant Pipe 2.0 TFSI 5Q0121070BT

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0122051EG-1

Volkswagen Golf R Mk7 Audi S3 8V Coolant Pipe Hose Line 2.0 TFSI DJH 5Q0122051EG

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0959455DT

VW Volkswagen Tiguan 5N 2.0 TDI CFFB Diesel Radiator Fan Shroud 1K0959455DT

€37.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. 2Q0121321A-2

Volkswagen Audi Seat Skoda Water Coolant Expansion Tank Cap Cover 2Q0121321A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122447FB

Volkswagen Golf Mk5 Touran Mk1 Radiator Coolant Water Hose Pipe 1K0122447FB

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L121131AA

Volkswagen Golf Mk6 Caddy 1.6 TDI Engine Water Coolant Pipe Hose 03L121131AA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06E121018D

Volkswagen Touareg 7L 3.0 TDI Engine Coolant Water Pump Unit 06E121005

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0121096AT

VW Volkswagen Touran 1T 1.4 TSI Radiator Coolant Hose Line Tube Pipe 1K0121096AT

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5N0122109D

VW Volkswagen Sharan 7n Tiguan 5N Coolant Hose Tube Line Pipe 5N0122109D

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6Q0121407B-1

Volkswagen Polo 6R Coolant Reservoir Expansion Tank Fluid Bottle 6Q0121407B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7L6121253B

VW Volkswagen Touareg 7L 3.0TDI Radiator Engine Cooling Coolant Unit 7L6121253B

€28.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. 059117021J

Volkswagen Touareg 7L Audi Q7 4L A6 C6 Engine Oil Cooler 3.0 TDI 059117021J

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6C0122073R

Volkswagen Polo 6C Water Coolant Pipe Hose Cooling Line 1.2 TSI 6C0122073R

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122073FR

VW Volkswagen Golf Mk6 Water Coolant Hose Pipe Line Petrol Engine 1K0122073FR

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5K0121251S

VW Jetta Mk4 Additional Coolant Radiator Engine Cooling Unit 1.4 TSI 5K0121251S

€156.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. 06K103199A

Volkswagen Golf R Mk7 Audi A3 8V Engine Crankcase Pipe Line 2.0 TFSI 06K103199A

€89.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06F122101A-1

VW Volkswagen Golf Mk6 VI Coolant Water Pipe Hose Line 06F122101A

€23.95

Free delivery: Nov 12 – 13

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Part no. 6C0122051AF

Volkswagen Polo 6C Coolant Hose Line Tube Pipe 1.2 TSI CJZC 6C0122051AE

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5QF122157AB

VW Volkswagen Tiguan AX1 1.5 Petrol Engine Coolant Hose Line Tube 5QF122157AB

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0122291K

VW Volkswagen Golf 5G 2.0 TFSI CHHA Coolant Flange 5Q0122291K

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. N90693001

Volkswagen Passat B6 Engine Coolant System T-Piece Line Hose Tube Pipe N90693001

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03N121070K

VW Volkswagen Tiguan AD1 Water Coolant Hose Pipe Line 2.0 TDI 03N121070K

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 022121121D

Volkswagen Touareg 7L Thermostat Housing 3.2 V6 Petrol 022121121D

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5K0122101M

Volkswagen Scirocco Mk3 Coolant Hose Radiator Water Pipe Line 5K0122101M

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0121203AN

Volkswagen Golf Mk6 Caddy 2C Radiator Cooling Fan 1.6 TDI Diesel 1K0121203AN

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7L0121253A

Volkswagen Touareg 7L Water Cooling Coolant Radiator 7L0121253A

€28.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. 2H0121805-1

Volkswagen Crafter 2E Engine Cooling Vacuum Valve Heating Pipe 2.0 TDI 2H0121805

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 059121016E

Volkswagen Amarok 2H Audi S5 F5 Coolant Water Pump 3.0 Diesel DDXE 059121016E

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L122157R

Volkswagen Golf Mk6 Caddy 1.6 TDI Diesel Water Coolant Pipe Hose 03L122157R

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122101JM

Seat Leon Mk2 1P Audi A3 8P Water Coolant Hose Pipe Line 2.0 Petrol 1K0122101JM

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7N0122073M

VW Volkswagen Sharan 7N Water Coolant Hose Pipe Line Tube 7N0122073M

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5C0965567

VW Scirocco Mk3 Audi A1 8X Auxiliary Water Pump 1.4 Petrol 5C0965567

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7E0963417B

Volkswagen Transporter T6 Camper T5 Additional Water Pump 7E0965561C

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03E121065A

VW Volkswagen Polo 6R Solid Water Coolant Pipe Hose Line Tube 03E121065A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L906088BN

Volkswagen Transporter T5 T6 Exhaust Gas Temperature Sensor TDI 03L906088BN

€23.95

Free delivery: Nov 12 – 13

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