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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4K0122471

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

£47.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4K0145365

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

£56.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4K0121485M

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

£42.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5Q0121051L

Audi A3 S3 8V Water Pipes Hoses Coolant Cooling Lines Set 5Q0121051L 5Q0121101P

£47.95

Free delivery: Aug 05

If paid before 14:00

Part no. 80A122055AF

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

£66.95

Free delivery: Aug 05

If paid before 14:00

Part no. 80C819371B

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

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 3C0122101FL

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

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4H0122101D

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

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 059121465B

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

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 059121075DJ

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. RHD-4K2819552A

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

£32.95

Free delivery: Aug 05

If paid before 14:00

Part no. RHD-4K2819372M

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. RHD-8E2819373AB

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

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 03C121070D

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8R0121086A

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

£37.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8E0265381

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K1819350AB

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 7L8121065R

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

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0122101J

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

£32.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4F0145943M

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 059129089

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 7L8122051B

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

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8R0819332N

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

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4H0121101AC

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

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4F0145738F

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8J0121447H

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4G0121448AF

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0121101M

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5N0121064H

Audi Q3 8U Volkswagen Tiguan 5N Coolant Hose Metal Pipe Radiator 5N0121064H

£32.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5N0121070S-2

Audi Q3 8U Engine Cooling Coolant Line Hose Pipe 2.0 TDI Diesel 5N0121070S

£66.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5Q0122157AB

Coolant Pipe Audi S1 8X S3 8V VW Golf R Mk7 2.0 TSI TFSI Water Hose 5Q0122157AB

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 06M121075L

Audi A4 B9 A5 S5 F5 Water Hose Cooling Radiator Coolant Pipe 3.0 TFSI 06M121075L

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. RHD-4H2819372H

Audi A8 D4 Radiator Coolant Feed Hose Water Pipe Line 3.0 TDI 4H2819372H

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0819350A

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 04L121444J

Audi A3 8V 30 TDI DGTE Diesel Engine Coolant Hose Line Tube Pipe 04L121444J

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5N0121070S-1

Audi Q3 8U Engine Cooling System Coolant Line Hose Pipe 5N0121070S

£61.95

Free delivery: Aug 05

If paid before 14:00

Part no. 80C819350B

Audi Q5 FY 2.0 TFSI Water Pipe Engine Cooling Radiator Coolant Hose 80C819350B

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4K0121481G

Audi A6 C8 A7 4K Coolant Pipe Water Hose Line 3.0 TFSI 4K0121481G

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 7L6122291AD

Audi Q7 7L Engine Radiator Coolant Hose Pipe Line Diesel 7L6122291AD

£47.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4H0121088AD

Audi A8 4H Expansion Bottle Tank Radiator Hose Line Tube Pipe 4H0121088AD

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4K0121486

Audi A6 C8 A7 4K Coolant Hose Water Pipe Cooling Line 4K0121486

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4K0121071J

Audi A6 C8 Engine Coolant Hose Pipe Water Line Cooling 4K0121071J

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4K0122158

Audi A6 C8 Engine Water Coolant Cooling Pipe Hose Line 2.0 TFSIe 4K0122158

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 04L122157BA

Audi A5 8T Heater Water Cooling Coolant Pipe Hose Line 04L122157BA

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. RHD-4H2819672S

Audi A8 D4 Radiator Coolant Return Hose Water Pipe Line 3.0 TDI 4H2819672S

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W0819350H

Audi A4 B9 A5 F5 1.4 TFSI Water Coolant Pipe Hose Line 8W0819350H

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 1K0122051AP

Audi A3 8P Coolant Water Pipe Hose Line Tube 1K0122051AP

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0819332G

Audi A4 B8 2.0 TDI Water Hose Cooling Radiator Coolant Pipe Line 8K0819332G

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W0819332AA

Audi A4 B9 Water Hose Cooling Engine Coolant Pipe Line 8W0819332AA

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4G0122101

Audi A6 C7 Radiator Upper Hose Line Pipe Left N/S 2.8 Petrol 4G0122101

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. RHD-4H2819337

Audi A8 D4 Diesel Engine Water Coolant Hose Line Tube Pipe 4H2819337

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 07L121070Q

Audi S8 D3 Quattro 5.2 FSI V10 BSM Coolant Pipe Right Water Line 07L121070Q

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 04L122157BT

Audi A4 B9 A5 F5 Water Coolant Cooling Hose Pipe 2.0 TDI 04L122157BT

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 06D121085C

Audi A4 B7 A6 C6 Water Coolant Hose Line Tube Pipe 2.0 TFSI BWE 06D121085C

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5Q0122101CE

Audi TTS FV Radiator Water Coolant Hose Pipe Tube Line Quick Release 5Q0122101CE

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 07L121065J

Coolant Hose Audi S8 A8 D3 A6 C6 5.2 Petrol FSI Left N/S Water Pipe 07L121065J

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4G0122293CA

Audi A4 B8 A6 C7 2.0 TDI Water Coolant Pipe Hose Line Tube 4G0122293CA

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5N0122073AC

Audi Q3 8U Water Hose Cooling Radiator Coolant Pipe Line 5N0122073AC

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 06E121065Q

Audi A4 B8 A6 C7 A7 4G A8 D3 Coolant Flange Pipe Hose Line Tube 06E121065Q

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 03L121157AC

Audi A4 B8 A5 8T Water Coolant Pipe Hose Line 2.0 TDI 03L121157AC

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4G0121448AQ

Audi RS6 C7 Heater Water Cooling Coolant Pipe Hose Line 4G0121448AQ

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 06H121057E

Audi A5 8T Water Hose Cooling Coolant Radiator Pipe Line 06H121057E

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 04L122157BE

Audi A5 8T 2.0 TDI CNHA Water Coolant Pipe Tube Line Hose 04L122157BE

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 6C0122073T

Seat Skoda Audi A1 8X 1.6 TDI Water Coolant Pipe Hose Cooling Line 6C0122073T

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0121081BC

Audi A4 B8 Rear Coolant Water Breather Pipe Line Tube Hose 8K0121081BC

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. RHD-8L2820547

Audi A3 8L Seat Leon Toledo Air Conditioning A/C Hose Pipe Line 8L2820547

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8T0941717D

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 04L121026R-1

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8J08207190

Audi TT 8J Air Conditioning A/C Hose Pipe Line 8J08207190

£85.95

Free delivery: Aug 05

If paid before 14:00

Part no. 06D121111G

Audi A4 B7 Coolant Regulator Thermostat Housing Pipe 2.0 TFSI BWE 06D121111G

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 06H121057G

Audi A4 B8 A5 8T Water Hose Cooling Coolant Radiator Pipe Line 06H121057G

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 06J103221-1

Audi TT 8J 1.8 TFSI Tank Breather Ventilation Pipe Line 06J103221

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 06J121132G

Audi TT 8J A4 B8 Water Coolant Flange Pipe Hose Line 06J121132G

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4K0121525A

Audi A6 C8 A7 4K High Voltage Battery Cooling Hose Tube 50 55 TFSIe 4K0121525A

£94.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4G0819377Q

Audi A6 C7 4.0 TFSI CRDB Coolant Hose Pipe Tube 4G0819377Q

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 03L122157Q-1

Audi A4 B8 A5 8T Coolant Pipe Water Cooling Line 2.0 TDI 03L122157Q

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 06E121044D

Audi S4 B8 Engine Coolant Pipe Water Hose Line 3.0 TFSI CAKA 06E121044D

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 06J133519A

Audi TT 8J Water Cooling Coolant Pipe Line Connector Bracket Holder 06J133519A

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 03C121469D

Audi A1 8X Turbo Water Coolant Hose Line Return Tube Pipe 03C121469D

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 3C0122101BM

Audi A3 8P Water Coolant Pipe Line Hose Cooling Unit 2.0 TDI 3C0122101BM

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0819377C-1

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

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 03C121497C

Audi A1 8X Turbocharger Water Feed Hose Cooling Coolant Pipe Line 03C121497C

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 06H133514K

Audi A5 8T 2.0 TFSI CDNB Vacuum Solenoid Coolant Line Tube Hose Pipe 06H133514K

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 04L121157

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. RHD-8K2819374E

Audi A4 B8 2.0 TFSI CDNC Exhanger Water Coolant Hose Pipe Line Tube 8K2819374E

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4H0121485AA

Audi A8 D4 3.0 TDI Diesel Engine Water Coolant Pipe Hose Line 4H0121485AA

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 03L121157AP

Coolant Pipe Audi A4 B8 A5 8T 2.0 TDI Water Cooling Line 03L121157AP

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4K0265235S

Audi A6 C8 Engine Water Cooling Pipe Hose Line 50TFSIe 4K0265235S

£56.95

Free delivery: Aug 05

If paid before 14:00

Part no. 06J133781BD

Audi TT 8J Water Hose Cooling Radiator Coolant Pipe Line 06J133781BD

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8R0122101S

Audi Q5 8R Water Coolant Pipe Hose Line 8R0122101S

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 04L121026AF

Audi Q2 GA Diesel Thermostat Coolant Regulator Connector Pipe Hose 04L121026AF

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0122293B

Audi A4 B8 Q5 8R Water Cooling Coolant Flange Pipe Hose 2.0 TDI 8K0122293B

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 1K0122051FE

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0121049AF-1

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K1819376D

Audi A4 B8 8K A5 8T Petrol Engine Water Coolant Pipe Hose Line 8K1819376D

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4K0122058G-1

Audi A6 C8 Engine Water Cooling Coolant Pipe Hose Line 2.0 TFSIe 4K0122058G

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 057121057C

Audi RSQ3 F3 2.5 TFSI Quattro Water Coolant Pipe Hose Line 057121057C

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4G0121485BE

Audi A6 C7 A7 4G8 Water Radiator Coolant Pipe Hose Tube Line Diesel 4G0121485BE

£28.95

Free delivery: Aug 05

If paid before 14:00

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