What is the construction and purpose of cooling system hoses and pipes?

Cooling system hoses and pipes are coolant circuit elements installed between the engine, radiator, thermostat, heater core, and expansion tank. A typical hose consists of an inner layer resistant to fluid, a reinforcing layer, and an outer cover protecting against temperature and material aging. Depending on the mounting location, it can take the form of a flexible hose or a rigid plastic or metal section.

What are cooling system hoses and pipes used for?

Cooling system hoses and pipes are used to route coolant through the entire system and maintain the proper engine operating temperature. They are responsible for connecting subassemblies, circuit tightness, and the proper transfer of fluid to the radiator, heater core, and water pump. Their failure can cause leaks, air in the system, and disruption of fluid circulation.

What is the construction and function of a cooling system connector?

A cooling system connector is a connection point to which a hose or pipe transporting coolant is attached. It can be part of the thermostat housing, radiator, cylinder head, or another subassembly and usually works with a gasket, clamp, or quick-connector. Its task is to maintain a tight and stable connection in places where pressure and temperature changes occur.

How to choose cooling system hoses and pipes for a specific car version?

It is best to compare the OEM part number, hose path, end diameters, and type of connectors. It is also worth checking the engine version, fuel type, production year, mounting location, and any interchangeable numbers. For used parts, the completeness of brackets, vents, and branches also matters.

What symptoms indicate wear of cooling system hoses and pipes?

The most common signs are coolant leaks, traces of moisture at connections, swollen material, cracks, or a hose structure that is too soft. In practice, fluctuations in engine operating temperature, gurgling, and sediment traces near clamps may also appear. Such symptoms should be checked along with fluid levels and connection tightness.

How to care for cooling system hoses and pipes after installation?

After installation, it is worth checking the hose routing, tightening of clamps, and lack of contact with hot or moving engine compartment elements. It is also important to check the coolant level and system venting after the first start. Regular inspections help to quickly detect leaks, abrasions, and material deformation.

Cooling system hoses and lines

At Global Parts, we offer a wide selection of original used car parts, including cooling system hoses and lines for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. The cooling system hoses and lines we offer are quality-controlled, ensuring you receive a top-quality product.

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Audi A7 4G Coolant Cooling Water Pipe Hose Line 3.0 TDI 4G0121447AL

£13.95

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Audi A6 C7 3.0 TDI CLAA Water Coolant Pipe Hose Line Tube 4H0121449Q

£13.95

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

£18.95

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Audi A5 8T Water Coolant Hose Line Tube Pipe 8K2819373N

£23.95

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Audi S1 8X VW Polo GTI Mk5 Water Coolant Pipe Hose Line 2.0 TFSI 6R0122109L

£13.95

Part no. 8K0121081F

Audi A5 8T 3.0 TDI CCWA Diesel Coolant Hose Line Pipe Tube 8K0121081F 059121399E

£32.95

Part no. 5N0122109AE

Audi Q3 8U Coolant Hose Radiator Cooling Water Pipe Line 5N0122109AE

£13.95

Part no. 8K1819376L

Audi A4 B8 8K A5 8T Engine Water Coolant Pipe Hose Line Diesel 8K1819376L

£13.95

Part no. RHD-8W0819372T

Audi A4 B9 A5 F5 Water Coolant Pipe Hose Line 3.0 TDI 8W0819372T

£13.95

Part no. 80A121400B

Audi Q5 FY Water Hose Cooling Coolant Radiator Pipe Line 80A121400B

£37.95

Part no. 1K0121096BH

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

£13.95

Part no. RHD-8W0819375AB

Audi A4 B9 A5 F5 Water Coolant Heater Pipe Hose Line 3.0 TDI 8W0819375AB

£13.95

Part no. 8P0122051

Audi RSQ3 8U Cooling System Water Coolant Hose Pipe Line 2.5 TFSI 8P0122051

£61.95

Part no. 6R0122157L

Audi A1 8X Volkswagen Polo 6R Engine Coolant Hose Tube Line Pipe 6R0122157L

£18.95

Part no. 4K0122101BP

Audi A6 C8 Water Pipe Hose Line Cooling Coolant 50 TFSIe 4K0122101BP

£32.95

Part no. RHD-8W2819350K

Audi A4 S4 B9 Engine Water Coolant Hose Pipe Line 8W2819350K

£18.95

Part no. 8K1819376P

Audi A5 8T 2.0 TFSI Water Hose Cooling Coolant Radiator Pipe Line 8K1819376P

£13.95

Part no. 4K0122157C

Audi A6 C8 Engine Water Coolant Cooling Pipe Hose Line 50TFSIe 4K0122157C

£28.95

Part no. 8K0819332J

Audi A5 8F 2.0 TDI Water Hose Cooling Radiator Coolant Pipe Line 8K0819332J

£18.95

Part no. 8K0133889B

Audi RS4 B8 4.0 FSI CFSA Petrol Coolant Hose Upper Top Left O/S 8K0133889B

£13.95

Part no. RHD-8W2819332

Audi A4 B9 A5 F5 Engine Cooling Water Coolant Water Hose Pipe Line 8W2819332

£23.95

Part no. 4G2819350K

Audi A7 4G Heater Radiator Hose Line Pipe 4G2819350K

£28.95

Part no. 4K0121520B

Audi A6 C8 Engine Water Cooling Pipe Hose Line 50 TFSIe 4K0121520B

£37.95

Part no. 4G0121485AF

Audi S6 C7 S7 4G Water Radiator Coolant Pipe Hose Lower Right O/S 4G0121485AF

£18.95

Part no. RHD-4G2819350Q

Audi A6 C7 Water Pipe Hose Engine Coolant Cooling Line 4G2819350Q

£23.95

Part no. 04E122157H

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

£18.95

Part no. 3C0121157AA

Audi A3 8P Engine Water Coolant Pipe Hose Line 1.9 TDI 3C0121157AA

£18.95

Part no. 06E121044L-1

Audi A4 S4 B8 S5 8T A6 C7 Coolant Pipe Hose Tube Line 06E121044L

£13.95

Part no. 8W0819885B

Audi A5 S5 F5 Water Hose Cooling Coolant Radiator Pipe Line 3.0 TDI 8W0819885B

£28.95

Part no. 06J133781BE

Audi TT 8J Water Hose Cooling Radiator Coolant Pipe Line 06J133781BE

£13.95

Part no. RHD-8W2819371

Audi A4 B9 A5 F5 Coolant Water Hose Line Tube Pipe 8W2819371

£23.95

Part no. RHD-4K2819377E

Audi A6 C8 Engine Cooling Water Pipe Coolant Hose Line Set 4K2819377E 4K0819377R

£75.95

Part no. 80A122055CH-1

Audi Q5 FY Engine Coolant Pipe Hose Line 40 TDI 80A122055CH

£28.95

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

£13.95

Part no. 80A121400B-1

Audi Q5 FY Water Hose Cooling Coolant Radiator Pipe Line 40 TDI 80A121400B

£32.95

Part no. 5N0121070M

Audi A3 8P Water Hose Cooling Radiator Coolant Pipe Line 5N0121070M

£13.95

Part no. 8W0122291AB

Audi A4 B9 35 TFSI DMSB Petrol Water Coolant Hose Line Tube Pipe 8W0122291AB

£13.95

Part no. 8K0121049AF

Audi A4 B8 2.0 TDI Water Coolant Hose Tube Line Pipe 8K0121049AF

£13.95

Part no. 4K0121140B

Audi A6 C8 Engine Water Coolant Cooling Pipe Hose Line 50 TFSIe 4K0121140B

£23.95

Part no. 05L122157AS

Audi A4 B9 A5 F5 Water Cooling Coolant Pipe Hose Line 2.0 TDI 05L122157AS

£23.95

Part no. 06E121044M

Audi A6 C7 A4 B8 A7 4G A8 D3 Coolant Hose Line Tube Pipe 06E121044M

£23.95

Part no. 6R0122101DJ

Audi A1 S1 8X 2.0 TFSI Petrol Water Coolant Pipe Hose Line 6R0122101DJ

£28.95

Part no. 8W0145925P

Audi A4 B9 A5 F5 Water Coolant Pipe Hose 2.0 TDI 8W0145925P

£28.95

Part no. 04L121070AB

Audi Q3 8U 2.0 TDI DFUA Diesel Water Coolant Hose Pipe Tube Line 04L121070AB

£13.95

Part no. 8W0145920M

Audi A5 F5 Water Hose Cooling Radiator Coolant Pipe Line 2.0 TDI 8W0145920M

£37.95

Part no. 04E121070L

Volkswagen Audi Seat Skoda Engine Plastic Water Coolant Pipe Hose 04E121070L

£18.95

Part no. 059121511BT

Audi A4 S4 B9 A5 S5 F5 Water Coolant Hose Line Tube Pipe 3.0 Diesel 059121511BT

£28.95

Part no. 5Q0122101CK

Audi A3 8V 1.6 Diesel Engine Coolant Hose Line Tube Pipe Right O/S 5Q0122101CK

£13.95

Part no. 6R0121070L

Audi A1 8X 1.4 TSI Petrol Engine Water Hose Coolant Pipe Line 6R0121070L

£23.95

Part no. RHD-8K2819350AD

Audi A4 B8 A5 8T Heater Coolant Hoses Pipes Water Line 2.0 TDI 8K2819350AD

£18.95

Part no. 8K0819337A

Audi A4 B7 2.0 TDI BRE Diesel Water Coolant Pipe Hose Line Tube 8K0819337A

£23.95

Part no. 1K0122101CK

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

£13.95

Part no. RHD-4G2819350AC

Audi A6 C7 A7 4G Water Pipe Hose Engine Coolant Cooling Line 3.0 TDI 4G2819350AC

£28.95

Part no. 4G0122101G

Audi A6 C7 2.0 TDI CGLC Water Coolant Hose Line Tube Pipe 4G0122101G

£13.95

Part no. 8W0145924P

Audi A4 B9 Water Hose Cooling Radiator Coolant Pipe Line 8W0145924P

£13.95

Part no. 4K0122061Q

Audi A6 C8 High Voltage Battery Cooling Hose Tube 50 55 TFSIe 4K0122061Q

£75.95

Part no. 04E103474G

Audi A3 8V Tank Crankcase Breather Vent Pipe Line 04E103474G

£18.95

Part no. 06L121075B

Audi A4 B8 A5 8T A6 C7 Water Coolant Pipe Hose Line 1.8 2.0 TFSI 06L121075B

£23.95

Part no. 4G0122109

Audi A7 4G Water Cooling Coolant Hose Pipe Line Rear Left N/S 4G0122109

£18.95

Part no. 5Q0121070BC

Audi Q3 8U Water Hose Engine Coolant Cooling Pipe Line 2.0 TDI 5Q0121070BC

£18.95

Part no. 8E0121109Q

Audi A4 B7 Water Pipe Engine Cooling Radiator Coolant Hose 3.2 Petrol 8E0121109Q

£18.95

Part no. 03C121070M

Audi A1 8X Water Pipe Hose Line Engine Cooling Coolant Unit Hose 03C121070M

£13.95

Part no. 8J0121051P

Audi TT 8J Engine Water Coolant Pipe Hose Line 2.0 TDI Diesel Engine 8J0121051P

£28.95

Part no. 4G0819374L

Audi A6 C7 A7 4G Coolant Hose Pipe Line 3.0 TDI CVUA 4G0819374L

£13.95

Part no. 3C0121447L

Audi A3 8P VW Passat 3C Touran 1T Coolant Hose Pipe Line Tube 3C0121447L

£47.95

Part no. 1K0122096J

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

£18.95

Part no. 8R0121055H-1

Audi Q5 8R Water Cooling Pipe Coolant Hose Tube Line 8R0121055H 4F0122293A

£23.95

Part no. 4G0121447CA

Audi A6 C7 A7 4GA Engine Water Coolant Pipe Hose Line Petrol 4G0121447CA

£18.95

Part no. rhd-4F2819374

Audi A6 C6 Water Hose Radiator Coolant Cooling Tube Pipe Line 4F2819374

£18.95

Part no. 4G0819377K

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

£13.95

Part no. 4G0122293CR

Audi A6 C7 Water Coolant Pipe Hose Line Tube 2.0 TDI Diesel Engine 4G0122293CR

£66.95

Part no. 7L8121065D-1

Audi Q7 4L Engine Coolant Hose Line Tube Pipe 3.0 TDI Diesel 7L8121065D

£23.95

Part no. 8K0819342J

Audi A5 8T 2.0 TDI Coolant Water Hose Line Cooling Tube Pipe 8K0819342J

£13.95

Part no. 3AA122157

Audi TT 8J Volkswagen Passat Water Coolant Hose Pipe Line 3AA122157

£13.95

Part no. 03L121071

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

£13.95

Part no. 4G0121049Q

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

£23.95

Part no. 04L121065CR

Water Hose Audi A3 8V Skoda Octavia IV 1.6 TDI Coolant Line Pipe 04L121065CR

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Audi Q3 SE Water Hose Cooling Coolant Radiator Pipe Line Hose 03L121157Q

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Part no. 5Q0816743D

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

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Part no. 1K0122063J

Audi TT 8J A3 8P Skoda Octavia II 2.0 TFSI Water Coolant Pipe Hose 1K0122063J

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Part no. 1K0121070BD

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

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Part no. 1K0122063G

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

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Part no. 1K0122109BB

Audi A3 8P Coolant Reservoir Expansion Overflow Line Pipe Hose Tube 1K0122109BB

Product currently unavailable

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Audi A3 8V Water Coolant Pipe Radiator Hose Cooling Fluid Line 5Q0122051EG

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Audi S5 8T 4.2 FSI CAUA Upper Coolant Radiator Hose Line Pipe 8K0121101L

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Part no. 4G0121049L

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

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Part no. 8K1819376J

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

Product currently unavailable

Part no. 04L121064AC

Audi A3 8V Engine Water Coolant Pipe Cooling Hose Line 04L121064AC

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Part no. 03G121065AE

Audi A3 8P Seat Leon Mk2 2.0 TDI Water Coolant Cooling Pipe Hose Line 03G121071A

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Part no. 1K0121070AQ

Audi TT 8J 2.0 TFSI Water Hose Coolant Pipe Line 1K0121070AQ

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Part no. 04L121071H

Audi A6 C7 Q5 8R Water Coolant Hose Pipe Tube Line 2.0 TDI DDDA 04L121071H

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Part no. 8W0121030N

Audi A4 B9 A5 F5 Water Coolant Cooling Hose Pipe Line 2.0 TDI 8W0121030N

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Part no. 5Q0121070AP

Audi A3 8V Water Hose Engine Coolant Cooling Pipe Line 5Q0121070AP

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Part no. 8J0121051Q

Audi TT Mk2 8J 2.0 TDI Engine Water Coolant Pipe Hose Line 8J0121051Q

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Part no. 5Q0122073AL

Volkswagen Passat B8 Water Coolant Hose Tube Line Pipe 2.0 TDI 5Q0122073AL

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Part no. 03G121096

Audi A4 B8 2.0 TDI Water Hose Radiator Coolant Pipe Line 03G121096

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Part no. 5Q0122073AE

Audi Q3 8U Water Coolant Hose Tube Line Pipe 2.0 TDI DFTA Diesel 5Q0122073AE

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Part no. 8K0121055E

Audi A5 8T Water Hose Cooling Coolant Radiator Pipe Line Diesel 8K0121055E

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Part no. 6C0122109A

Audi A1 8X 1.4 TFSI Engine Water Coolant Pipe Hose Line Tube 6C0122109A

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