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 A4 B8 Water Hose Radiator Coolant Pipe Line 2.0 TDI Diesel 03L122157AA

£13.95

Part no. 8E0260707BK

Audi A4 B7 2.0 TDI Air Conditioning A/C Refrigerant Pipe Hose Line 8E0260707BK

£13.95

Part no. 6R0122101CA

Audi A1 8X Coolant Hose Water Pump Pipe Cooling Line 1.4 Petrol 6R0122101CA

£28.95

Part no. 3Q0121058C

Audi Q3 F3 Water Hose Cooling Radiator Coolant Pipe Line 2.0 TDI 3Q0121058C

£13.95

Part no. 8K0819332B

Water Pipe Audi A5 S5 8T S4 B8 8K 3.0 TFSI V6 Coolant Hose Line 8K0819332B

£18.95

Part no. 8R0819374D

Audi Q5 8R Coolant Hose Pipe Water Line Tube 2.0 TDI 8R0819374D

£13.95

Part no. 06L121085AF

Audi Q5 FY A4 B9 8W 2.0 TFSI Petrol Engine Water Coolant Pipe Hose 06L121085AF

£23.95

Part no. 4K0121449S

Audi A6 C8 3.0 TDI Engine Coolant Pipe Water Hose Line 4K0121449S

£13.95

Part no. 8W0121448H

Audi A5 F5 2.0 TDI DEZE Water Coolant Hose Line Pipe Tube 8W0121448H

£18.95

Part no. 057121597M

Audi Q7 4L 4.2 TDI Diesel Turbocharger Coolant Pipe Hose Right O/S 057121597M

£13.95

Part no. 04L122157BF

Audi A4 B8 2.0 TDI CNHC Diesel Engine Water Coolant Pipe Hose Line 04L122157BF

£18.95

Part no. 80A819370B

Audi Q5 FY 2.0 TFSI Engine Water Coolant Pipe Hose Line 80A819370B

£13.95

Part no. 8E0819373K

Audi RS4 B7 Engine Water Coolant Pipe Return Hose Line 4.2 V8 BNS 8E0819373K

£42.95

Part no. 04L121071G

Audi A4 B9 2.0 TDI DETA Diesel Water Coolant Hose Pipe Tube Line 04L121071G

£13.95

Part no. 8K0819334E

Audi A4 B8 Heat Exchanger Heater Pipe Hose Line 2.0 TDI 8K0819334E

£94.95

Part no. 059121447R

Audi Q7 4M Quattro Water Hose Cooling Radiator Pipe Line 3.0 TDI 059121447R

£13.95

Part no. 059121054C

Audi A8 D4 3.0 TDI Diesel Coolant Water Hose Line Tube Pipe Engine 059121054C

£18.95

Part no. 8W0819350G

Audi A4 B9 A5 F5 Water Coolant Heater Hose Pipe 2.0 TDI 8W0819350G

£13.95

Part no. 4H0819334L

Audi A8 D4 3.0 TDI Heater Hose Cooling Coolant Radiator Pipe Line 4H0819334L

£13.95

Part no. 06M121071E

Audi SQ5 FY 3.0 TFSI Water Hose Cooling Radiator Coolant Pipe Line 06M121071E

£23.95

Part no. 079121071CF-1

AUDI S5 8T Petrol 4.2 FSI V8 Coolant Hose Rear Engine Water Pipe 079121071CF

£47.95

Part no. 8W0122293AE

Audi A4 B9 2.0 TDI DETA Water Coolant Hose Line Tube Pipe 8W0122293AE

£18.95

Part no. 8W0122448S

Audi A5 F5 Water Coolant Hose Line Pipe Tube 8W0122448S

£13.95

Part no. 1K0122073DD

VW Volkswagen Eos 1F Water Hose Cooling Coolant Radiator Pipe Line 1K0122073DD

£13.95

Part no. 5Q0122101BP

Audi A3 8V 2.0 TDI Water Hose Radiator Coolant Pipe Line Diesel 5Q0122101BP

£13.95

Part no. 7L0815987E

Audi Q7 4L Auxiliary Water Heater Feed Coolant Pipe Hose Diesel 7L0815987E

£13.95

Part no. 8W0819334AE

Audi A5 F5 Coolant Water Quick Connect Heater Pipe Hose 8W0819334AE

£18.95

Part no. 059121507AB

Audi A5 8T Engine Coolant Cooling Hose Pipe Line 3.0 TDI Diesel 059121507AB

£13.95

Part no. 420121456

Audi R8 Gen 1 4.2 FSI Coolant Pipe Hose Line Right O/S 420121456

£56.95

Part no. 8K0819377C

Audi A5 8T Radiator Water Cooling Coolant Pipe Hose Line Diesel 8K0819377C

£18.95

Part no. 4M0122447J

Audi Q7 4M Q8 Mk2 3.0 Diesel Water Coolant Pump Line Tube Pipe Q4M0122447J

£23.95

Part no. 420121073

Audi R8 42 Engine Coolant Pipe Water Hose Cooling Line Tube 420121073

£28.95

Part no. 8W2819377

Audi A4 S4 B9 Engine Cooling Water Coolant Hose Pipe Line 8W2819377

£28.95

Part no. 8P0121075

Audi RS3 8P Water Coolant Pipe Hose Line Outer Right O/S 2.5 TFSI 8P0121075

£37.95

Part no. 03L121157AA

Audi A4 B8 A5 8T Water Hose Cooling Radiator Pipe Line 2.0 TDI 03L121157AA

£18.95

Part no. RHD-8E2819371AG

Audi RS4 B7 Water Coolant Return Pipe Hose Line 4.2 FSI 8E2819371AG

£37.95

Part no. 059121511BT-1

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

£28.95

Part no. 8P0121109C

Audi RS3 8P Water Reservoir Coolant Pipe Hose Line 2.5 TFSI 8P0121109C

£13.95

Part no. 8W0122101H

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

£13.95

Part no. 8P0122061

Audi RS3 8P Water Coolant Hose Breather Line Pipe 2.5 TFSI Petrol 8P0122061

£37.95

Part no. 4G0145931G

Audi A4 B8 A5 8T 2.0 TDI Water Coolant Pipe Hose Line 4G0145931G

£13.95

Part no. 07K121109

Audi RS3 8P Water Coolant Pipe Hose Line 2.5 TFSI 07K121109

£28.95

Part no. 4G0145909B

Audi A4 B8 A5 8T 2.0 TDI Water Coolant Pipe Hose Line 4G0145909B

£13.95

Part no. 079121070BS

AUDI S5 8T 4.2 Petrol CAUA Coolant Pipe Right O/S Cooler Water Hose 079121070BS

£18.95

Part no. 6R0122051BR

Water Hose Audi A1 S1 8X 2.0 Cooling Radiator Coolant Pipe Line 6R0122051BR

£56.95

Part no. 1K0122051FE-1

Audi A3 8P TT 8J MK2 Water Hose Cooling Coolant Radiator Pipe Line 1K0122051FE

£18.95

Part no. 4G0145910B

Audi A4 B8 A5 8T 2.0 TDI Water Coolant Pipe Hose Line 4G0145910B

£13.95

Part no. 079121065P

Audi A4 B7 4.2 V8 Petrol Coolant Pipe Cooler Water Hose 079121065P

£13.95

Part no. 5N0129637D

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

£13.95

Part no. 06M121085H

Audi A4 S4 B9 VW Touareg Water Coolant Pipe Hose Line 06M121085H

£18.95

Part no. 4G0121081EJ

Audi A7 Sportback 4G Coolant Hose Pipe 3.0 TDI Diesel 4G0121081EJ

£13.95

Part no. RHD-8W2122109E

Water Cooling Hose Audi A4 B9 A5 F5 Radiator Coolant Pipe Line 8W2122109E

£18.95

Part no. 03L121157AK

Audi A4 S4 8K A5 S5 8F Engine Water Coolant Hose Tube Pipe Line 03L121157AK

£13.95

Part no. RHD-4H2820195E

Audi A8 D4 Heater Coolant Hose Pipe Line Mount Bracket Holder 4H2820195E

£18.95

Part no. 4F0121251AE

Audi A6 C6 FL Water Hose Radiator Coolant Cooling 4F0121251AE

£75.95

Part no. 8W2819350L

Audi A4 S4 B9 A5 F5 Engine Water Coolant Hose Pipe Line 2.0 TFSI 8W2819350L

£13.95

Part no. RHD-8K2819371E

Audi A4 A5 8K B8 3.0 TDi Heater Matrix Connecting Coolant Pipes Hoses 8K2819371E

£18.95

Part no. 8W0122449AS-1

Audi A4 S4 A5 S5 F5 Radiator Coolant Hose Tube Pipe Line 8W0122449AS

£18.95

Part no. 6R0129637E

Audi A1 8X Air Filter Box Pipe Pipe Line Hose 1.6 TDI CAYC 6R0129637E

£13.95

Part no. 8W0819332D

Audi A4 B9 A5 F5 Water Hose Engine Cooling Coolant Pipe Line Diesel 8W0819332D

£13.95

Part no. 4H0121055AB

Audi A8 D4 3.0 Diesel Coolant Return Line Tube Pipe Hose Right O/S 4H0121055AB

£28.95

Part no. 8W0122291AH

Audi A4 B9 A5 F5 Coolant Water Pipe Grommet 2.0 TDI Diesel 8W0122291AH

£13.95

Part no. 03C121070B

Audi A3 8P Water Pipe Hose Line Engine Cooling Coolant Unit Hose 03C121070B

£13.95

Part no. 4G0121049AG

Audi A6 C7 2.0 TDI CGLC Water Radiator Coolant Pipe Hose Tube Line 4G0121049AG

£13.95

Part no. 4K0122471

Audi A6 C8 4K0122471 Engine Coolant Hose Line Tube Pipe Petrol Engine 4K0122471

£47.95

Part no. 4K0145365

Audi A6 C8 Engine Water Coolant Pipe Hose Line 2.0 TFSIe 4K0145365

£56.95

Part no. 4K0121485M

Audi A6 C8 A7 C8 Engine Cooling Coolant Pipe Line 3.0 Petrol Engine 4K0121485M

£23.95

Part no. 06K121075AR

Audi Q3 8U VW Beetle Scirocco Mk3 Coolant Pipe Water Cooling Hose 06K121075AR

£18.95

Part no. 80A122055AF

Audi Q5 FY 2.0 TFSI Petrol Water Hose Cooling Coolant Pipe Line 80A122055AF

£66.95

Part no. 80C819371B

Audi Q5 FY Coolant Water Hose Line Cooling Unit Tube Pipe 2.0 Petrol 80C819371B

£23.95

Part no. 3C0122101FL

Volkswagen Seat Skoda Audi Water Coolant Pipe Line Hose 2.0 TDI 3C0122101FL

£28.95

Part no. 4H0122101D

Audi A8 D4 Water Pipe Engine Cooling Coolant Hose Line 3.0 TDI Diesel 4H0122101D

£28.95

Part no. 059121465B

Coolant Pipe Audi A6 C7 Q7 4L 3.0 TDI Water Hose Line Tube 059121465B

£28.95

Part no. 059121075DJ

Audi Q7 4L Quattro Diesel 3.0 V6 TDI Engine Cooling Coolant Pipe 059121075DJ

£13.95

Part no. RHD-4K2819552A

Audi A6 C8 A7 4K Engine Heating Pipe Coolant Hose Line 2.0 Petrol 4K2819552A

£32.95

Part no. RHD-4K2819372M

Audi A6 C8 Heating Line Tube Pipe Hose Coolant Pipe 4K2819377K

£13.95

Part no. RHD-8W2121036Q

Audi A4 B9 A5 F5 Water Coolant Hose Pipe Line 3.0 TDI 8W2121036Q

£94.95

Part no. RHD-8E2819373AB

Audi RS4 B7 Water Pipe Engine Cooling Radiator Coolant Hose 4.2 FSI 8E2819373AB

£23.95

Part no. 1K0122101GG

Audi A3 8P Water Coolant Pipe Hose Line 1.8 FSI BZB Petrol Engine 1K0122101GQ

£13.95

Part no. 07K121057A

Coolant Hose Audi RS3 8V TTRS 8S 2.5 TFSI Cooling Pipe Line 07K121057A

£18.95

Part no. 03L121157-1

Audi A4 B8 A5 8T A6 C6 Water Coolant Pipe Hose Line 2.0 TDi Diesel 03L121157

£18.95

Part no. 03C121070D

Audi A3 8P Water Pipe Hose Line Engine Cooling Coolant Unit Hose 03C121070D

£13.95

Part no. 8E0260707BD

Audi S4 B6 4.2 V8 Water Coolant Pipe Hose Line 8E0260707BD

£85.95

Part no. 8R0121086A

Audi Q5 8R 3.0 TDI Water Hose Cooling Radiator Coolant Pipe Line 8R0121086A

£37.95

Part no. 8E0265381

Audi A3 8V 35 TDI Water Coolant Pipe Hose Line 8E0265381

£18.95

Part no. 8K1819350AB

Audi A4 B8 A5 8T Heater Matrix Connecting Pipe Coolant Hose Tube 8K1819350AB

£13.95

Part no. 8R0121101G

Audi A4 B8 A5 Water Coolant Hose Pipe Line 8R0121101G

£13.95

Part no. 7L8121065R

Audi Q7 4L 3.0 Diesel Engine Coolant Hose Line Tube Pipe 7L8121065R

£23.95

Part no. 8K0122101J

Audi A4 B8 A5 8T Heater Water Cooling Coolant Pipe Hose Line 3.0 TFSI 8K0122101G

£18.95

Part no. 4F0145943M

Audi A6 C6 3.0 TDI Diesel Charger Air Hose Pipe Line Tube 4F0145943H 4F0145943M

£18.95

Part no. 059129089

Audi Q7 4L Water Pipe Hose Line Engine Cooling Coolant Unit Hose 059129089

£13.95

Part no. 7L8122051B

Audi Q7 4L VW Touareg 7L 4.2 TDi Coolant Hose Water Pump Pipe 7L8122051B

£23.95

Part no. 8R0819332N

Audi Q5 8R 2.0 TDI Engine Water Coolant Pipe Hose Line Diesel 8R0819332N

£28.95

Part no. 4H0121101AC

Audi A8 D4 Radiator Coolant Hose Water Pipe Line 3.0 TDI 4H0121101AC

£18.95

Part no. 4F0145738F

Audi A6 C6 3.0 TDI Diesel Turbo Charger Intercooler Pipe Hose Duct 4F0145738F

£13.95

Part no. 8J0121447H

Audi TT 8J 2.0 TDI CFGB Engine Coolant Hose Pipe 8J0121447H

£18.95

Part no. 4G0121448AF

Audi Q5 8R 3.0 TDI Water Hose Cooling Coolant Pipe Line Hose 4G0121448AF

£13.95

Part no. 8K0121101M

Water Pipe Audi A4 B8 A5 8T Q5 8R 2.0 TFSI Coolant Hose Line 8K0121101M

£13.95

Part no. 5N0121086D

Audi Q3 8U Coolant Cooling Hose Pipe Line 2.0 TDI Diesel Engine 5N0121086D

£23.95

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