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 A3 8V Water Coolant Engine Cooling Flange Pipe Hose Line 5Q0121109S

£13.95

Part no. 03L121157AQ

Audi A4 B8 A5 8T 2.0 TDI Water Hose Cooling Radiator Pipe Line 03L121157AQ

£13.95

Part no. 04L121157

Audi A4 B8 A6 C7 Water Coolant Pipe Hose Line Tube Right O/S 2.0 TDI 04L121157

£13.95

Part no. 06K121085M-1

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

£13.95

Part no. 8K0122101B

Audi A4 B8 A5 8T Heater Water Cooling Coolant Pipe Hose Line 3.0 TDI 8K0122101B

£32.95

Part no. 8R0121049J

Audi Q5 8R 2.0 TDI Coolant Water Hose Cooling Unit Line Tube Pipe 8R0121049J

£23.95

Part no. 06D121065L

Audi A4 B7 Water Coolant Pipe Hose Line 2.0 TFSI 06D121065L

£18.95

Part no. 8J0121109A

Audi TT 8J 2.0 TFSI Water Hose Cooling Coolant Radiator Pipe Line 8J0121109A

£18.95

Part no. RHD-8R2819350F

Audi Q5 8R Water Coolant Hose Line Heater Valve Pipe 2.0 TDI Diesel 8R2819350F

£23.95

Part no. 06K121075P

Audi A3 S3 8V Water Hose Radiator Coolant Pipe Line 2.0 Petrol 06K121075P

£13.95

Part no. 079121071BN

Audi A5 S5 8T 4.2 V8 FSI Solid Coolant Pipe Water Hose Line 079121071BN

£18.95

Part no. 03G121065R

Audi A4 B7 2.0 TDI BRE Water Coolant Pipe Hose Line 03G121071A

£123.95

Part no. 06K121075BF

Engine Coolant Pipe Audi A3 S3 8V 2.0 TFSI Water Cooling Hose Line 06K121075BF

£23.95

Part no. 8K0121055N

Audi A4 B8 A5 8T 1.8 2.0 TFSI Petrol Engine Water Coolant Pipe Hose 8K0121055N

£28.95

Part no. 8R0121101J

Audi Q5 8R 2.0 TDI Coolant Water Hose Line Tube Pipe 8R0121101J

£13.95

Part no. 8W0145947E

Audi A4 B9 A5 F5 2.0 TDI Diesel Engine Water Coolant Pipe Hose Line 8W0145947E

£13.95

Part no. 1K0122447ED-1

Audi A3 8P 1.9 TDI BLS Diesel Coolant Water Hose Line Tube Pipe 1K0122447ED

£13.95

Part no. 1K0121157BJ

Audi A4 B7 2.0 TDI Diesel Water Hose Cooling Coolant Pipe Line 1K0121157BJ

£18.95

Part no. 06E121083G

Audi S4 B8 S5 8T Water Hose Coolant Pipe Line Tube 3.0 TFSI 06E121083G

£47.95

Part no. 1K0122109BT

Volkswagen Golf Mk5 Audi A3 8P Water Hose Cooling Coolant Pipe Line 1K0122109BT

£18.95

Part no. 06H103221J

Audi A3 8P A4 B8 Ventilation Breather Pipe Hose Line 1.8 TFSI 06H103221J

£13.95

Part no. 1K0122051GL

Audi S3 8P VW Golf VI Water Coolant Hose Radiator Pipe Line 2.0 TFSI 1K0122051GL

£13.95

Part no. 8K0121109AA

Water Hose Audi A5 8T A4 B8 Cooling Coolant Radiator Pipe Line 8K0121109AA

£13.95

Part no. 059121102C

Audi A4 B8 A5 8T A6 C6 Coolant Hose Line Tube Pipe 3.0 TDI 059121102C

£13.95

Part no. 06F121056C

Audi A1 8X A3 8P TT 8J VW Golf Mk5 Water Coolant Hose Pipe Line 06F121056C

£42.95

Part no. 1K0121086T

Audi A3 8P 1.9 TDI Diesel Coolant System Rubber Hose Pipe Line 1K0121086T

£18.95

Part no. 8K0819334Q

Audi A5 S5 8T Coolant Water Hose Line Tube Pipe 3.0 TFSI 8K0819334Q

£13.95

Part no. 8W0121400B

Audi A4 B9 Oil Coolant Hose Pipe Line Tube 8W0121400B

£28.95

Part no. 06E121044L

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

£13.95

Part no. 03L121157AE-1

Audi A6 C7 Q5 8R Water Coolant Pipe Hose Tube 2.0 TDi 03L121157AE

£23.95

Part no. 4G0819377M

Audi A6 C7 A7 4G 3.0 TFSI Coolant Water Hose Pipe Line Tube 4G0819377M

£13.95

Part no. 5Q0121070BQ-1

Audi S3 8V Water Hose Engine Coolant Cooling Pipe Line Tube 5Q0121070BQ

£13.95

Part no. 8J0121124A

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

£32.95

Part no. 8K0819374S

Audi A4 B8 A5 8T 2.0 TDI Heater Valve Coolant Pipe Hose 8K0819374S

£13.95

Part no. 03L122157F

Audi A4 B8 2.0 TDI Water Hose Radiator Coolant Pipe Line 03L122157F

£13.95

Part no. 80A122101AD

Audi SQ5 FY 3.0 TDI CWGD Water Coolant Pipe Hose Line Tube 80A122101AD

£18.95

Part no. 8K0819857B

Audi A5 8T Water Pipe Hose Line Engine Cooling Coolant Unit Hose 8K0819857B

£23.95

Part no. 1K0122109AS

Audi A3 8P Engine Water Coolant Pipe Hose Line 1.4 TFSI CAXC Petrol 1K0122109AS

£18.95

Part no. 8K1819350AQ

Audi A4 S4 B8 Water Hoses Cooling Coolant Radiator Pipes 3.0 TFSI 8K1819350AQ

£18.95

Part no. 4M0819350F

Audi Q7 4M Q8 Mk2 VW Touareg Mk3 Water Coolant Hose Line Tube Pipe 4M0819350F

£18.95

Part no. 8K0819377AA

Audi A5 8T Water Hose Cooling Radiator Coolant Pipe Line 8K0819377AA

£23.95

Part no. 8K0819376AC

Audi A5 8T Coolant Water Hose Line Tube Pipe 3.0 TDI Diesel Engine 8K0819376AC

£18.95

Part no. 4K0122101BJ

Audi A6 C6 Water Pipe Hose Line Cooling Coolant 4K0122101BJ

£37.95

Part no. 3AA122073A

Audi TT 8J Engine Coolant Hose Pipe Line Tube Quick Release Coupling 3AA122073A

£13.95

Part no. 5N0122447BD

Audi Q3 8U Water Coolant Cooling Pipe Hose Line 2.0 TDI Diesel 5N0122447BD

£13.95

Part no. 059121071DE

Audi A4 B9 A5 8T Radiator Coolant Water Hose Line Tube Pipe 3.0 TDI 059121071DE

£13.95

Part no. 8K0819373K

Audi A5 8T Coolant Water Hose Line Tube Pipe 8K0819373K

£18.95

Part no. 8K0819374

Audi A4 B8 2.0 TDI Diesel Water Pipe Engine Cooling Coolant Hose Line 8K0819374

£18.95

Part no. 8T0941717D-1

Audi A4 RS4 B8 Headlight Lamp Drain Hose Pipe Line Tube Left N/S 8T0941717D

£13.95

Part no. 059121507M

Audi A4 S4 8K A5 S5 8T Engine Coolant Pipe Hose Tube Line 059121507M

£13.95

Part no. 6C0122447K

Audi A1 8X Polo 6C Water Coolant Hose Pipe 1.4 TSI TFSI 6C0122447K

£23.95

Part no. 8K0121101P

Audi A4 B8 2.0 TDI Diesel Water Pipe Engine Cooling Coolant Hose Line 8K0121101P

£13.95

Part no. 5N0122051BD

Audi Q3 8u Engine Water Coolant Cooling Pipe Line 2.0 TFSI Petrol 5N0122051BD

£13.95

Part no. 4G0819374R

Audi A6 Allroad A7 4G8 Sportback Heater Coolant Hose Pipe Line Tube 4G0819374R

£13.95

Part no. 8N0121070B

Audi TT 8N Radiator Coolant Hose Pipe Tube Line 1.8 Petrol BAM 8N0121070B

£113.95

Part no. 5Q0122051BJ

Audi A3 8V 1.6 TDI CRKB Water Coolant Pipe Hose Line Tube 5Q0122051BJ

£47.95

Part no. 06H121085C-1

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

£13.95

Part no. 1K0122051HD-1

Audi A3 8P VW Scirocco Mk3 2.0 TDI Diesel Radiator Coolant Hose 1K0122051HD

£28.95

Part no. 8K1819376M

Audi A4 B8 2.0 TDI Diesel Engine CAHA Coolant Hose Heater Water Line 8K1819376M

£13.95

Part no. 4M0121044B

Audi Q7 4M Water Coolant Pipe Hose Line 3.0 TDI Diesel Engine 4M0121044B

£47.95

Part no. 8W0122055CA-1

Audi A4 B9 A5 F5 Engine Water Coolant Pipe Hose Line 2.0 TDI 8W0122055CA

£42.95

Part no. 5Q0122101CM-1

Audi A3 8V 35 TDI DFGA Water Coolant Hose Line Pipe Tube 5Q0122101CM

£13.95

Part no. 8W0145919K

Audi A5 F5 Water Coolant Hose Line Pipe Tube 8W0145919K

£23.95

Part no. 8W0819342Q

Audi A5 F5 Engine Water Coolant Cooling Pipe Hose Line 8W0819342Q

£13.95

Part no. 06K121065Q

Audi TT FV Water Coolant Pipe Hose Line 06K121065Q

£13.95

Part no. 1K0121063R

Audi A3 8P 1.4 TFSI CAXC Coolant Hose Line Tube Pipe 1K0121063R

£13.95

Part no. 5N0122051CD

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

£28.95

Part no. 8W0122073F

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

£13.95

Part no. 8K0145923F

Audi A4 S4 B8 S5 8T Radiator Coolant Hose Tube Pipe Line 8K0145923F

£18.95

Part no. 1K0121096BQ

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

£13.95

Part no. 059121065BK

Audi A5 8T Water Hose Cooling Coolant Radiator Pipe Line 2.7 TDI 059121070M

£13.95

Part no. 059121511G

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

£13.95

Part no. 8U0121485

Audi RSQ3 8U Front Water Coolant Pipe Hose Line Tube 2.5 TFSI 8U0121485

£42.95

Part no. 8J0121447D

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

£13.95

Part no. 5Q0122063

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

£13.95

Part no. 8K0121030K

Audi A4 B8 Water Hose Radiator Coolant Pipe Line 1.8 2.0 Petrol 8K0121030K

£13.95

Part no. 1K0133366BB

Audi A3 8P A4 B7 Golf Mk6 Water Coolant Pipe Hose Line 2.0 TSI 1K0133366BB

£13.95

Part no. 5Q0121063N

Audi A3 8V 1.0 TSI Water Pipe Engine Cooling Coolant Hose Line 5Q0121063N

£23.95

Part no. 059121445L

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

£13.95

Part no. 06F121057C

Audi A1 8X S3 8P VW Golf R Mk5 Water Coolant Pipe Hose Line 2.0 TSI 06F121057C

£37.95

Part no. 4G0122055AB

Audi A6 C7 A7 4G8 Radiator Coolant Water Pipe Hose Line Tube Petrol 4G0122055AB

£13.95

Part no. 8W0121064B-1

Audi Q7 4M 3.0 TDI Engine Coolant Pipes Hoses Cooling Water Line 8W0121064B

£37.95

Part no. 04L122157CC

Audi A4 B9 2.0 TDI Diesel Engine Coolant Hose Line Pipe Tube 04L122157CC

£23.95

Part no. 06N121085D

Audi A4 B9 A5 F5 A6 A7 C8 Radiator Water Coolant Hose Pipe Line Left 06N121085D

£56.95

Part no. 06A121065DP

Audi A3 8P 1.6 MPI Water Pipe Coolant Supply Metal Hose 06A121065DP

£23.95

Part no. 06L121081AF

Audi A4 B9 A5 F5 A6 A7 C8 A8 D5 Q5 F8 Engine Coolant Hose Pipe Line 06L121081AF

£32.95

Part no. 7L8121058C

Audi Q7 4L 4.2 TDI Water Coolant Pipe Hose Line 7L8121058C

£13.95

Part no. RHD-4G2819350AE

Audi A6 S6 C7 A7 4G Engine Coolant Cooling Hose Water Pipe Line 4G2819350AD

£23.95

Part no. 1K0122109

Audi A3 8P Water Hose Cooling Coolant Pipe Line 1K0122109

£18.95

Part no. 8K0121081P

Audi A4 B8 2.0 TDI CAGA Radiator Water Coolant Pipe Hose Tube Line 8K0121081P

£18.95

Part no. 8W0121501AL

Audi S4 B9 3.0 Petrol Water Hose Cooling Coolant Pipe Line 8W0121501AL

£18.95

Part no. 059121064D

Audi A5 8T Water Hose Cooling Coolant Radiator Pipe Line 059121070E

£23.95

Part no. 4G0121485BS

Audi A6 C7 A7 4G8 Water Radiator Coolant Pipe Hose Tube Line Petrol 4G0121485BS

£28.95

Part no. 8K0819342L

Audi S5 8T 3.0 TFSI Coolant Water Hose Line Cooling Tube Pipe 8K0819342L

£13.95

Part no. 8W0122448AA

Water Coolant Hose Audi A4 B9 A5 F5 2.0 Petrol Line Pipe Tube 8W0122448AA

£18.95

Part no. RHD-8K2819350AD-1

Audi A4 B8 A5 8T Heater Coolant Hose Pipe Water Line 2.0 TDI 8K2819350AD

£18.95

Part no. 079121065BN-1

AUDI S5 8T 4.2 Petrol CAUA Coolant Pipe Left N/S Cooler Water Hose 079121065BN

£23.95

Part no. 420121439

Audi R8 42 Gen 1 4.2 FSI Engine Water Coolant Hoses 420121439

£28.95

Part no. 04L121131A

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

£18.95

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