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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0819377AA

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

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0819376AC

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4K0122101BJ

Audi A6 C6 Water Pipe Hose Line Cooling Coolant 4K0122101BJ

£37.95

Free delivery: Aug 05

If paid before 14:00

Part no. 3AA122073A

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 059121071DE

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0819373K

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0819374

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0121101P

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4G0819374R

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4F0819375F

Audi A6 C6 Water Coolant Cooling Heater Heating Pipe Hose Diesel 4F0819375F

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 07K121497H

Audi RS3 8Y Water Pipe Engine Cooling Coolant Hose Line 2.5 TFSI 07K121497H

£113.95

Free delivery: Aug 6 – 13

If paid before 14:00

Part no. 06H121085C-1

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 06H121497F

Audi A4 B8 A5 8T Turbocharger Coolant Feed Pipe Hose Line 1.8 TFSI 06H121497F

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4M0121044B

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

£47.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W0145919K

Audi A5 F5 Water Coolant Hose Line Pipe Tube 8W0145919K

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W0819342Q

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 06K121065Q

Audi TT FV Water Coolant Pipe Hose Line 06K121065Q

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W0122073F

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 1K0122073B

Audi Seat Skoda Volkswagen Water Return Coolant Pipe Hose Line 1K0122073B

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 059121065BK

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 059121511G

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8J0121447D

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4H0121081AB

Audi A8L 4H Expansion Bottle Tank Radiator Hose Line Tube Pipe 4H0121081AB

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5Q0122063

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0121030K

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

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0121081AT

Audi A4 B8 A5 8T Engine Breather Hose Tube Pipe Line 8K0121081AT

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5Q0121063N

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

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 059121445L

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4G0122055AB

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W0121064B-1

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

£37.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0145921Q

Audi S5 8T 3.0 TFSI Radiator Upper Hose Line Pipe Left N/S 8K0145921Q

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 04L122157CC

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

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5Q0122051EJ

Audi A3 S3 8V 2.0 TFSI Engine Water Cooling Pipe Hose Line 5Q0122051EJ

£32.95

Free delivery: Aug 05

If paid before 14:00

Part no. RHD-4G2819350AE

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

£32.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W0121501AL

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

£32.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W0122055BN

Audi A4 B9 A5 F5 Coolant Pipe Radiator Hose Line Tube 2.0 Petrol 8W0122055BN

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 059121064D

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

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4G0121485BS

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

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0819342L

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W0122448AA

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 079121065BN-1

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

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 420121439

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

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 04L121131A

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0819334AP

Audi S5 8T 3.0 TFSI Coolant Water Hose Line Tube Pipe 8K0819334AP

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 03L122157AA

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8E0260707BK

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

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0819332B

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 06L121085AF

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

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4K0121449S

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 1K0122109AL

Audi A5 8T Engine Water Coolant Pipe Cooling Hose Line 2.0 Petrol 1K0122109AL

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W0121448H

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

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 04L122157BF

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 80A819370B

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8E0819373K

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

£42.95

Free delivery: Aug 05

If paid before 14:00

Part no. 04L121071G

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0819334E

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

£94.95

Free delivery: Aug 6 – 13

If paid before 14:00

Part no. 059121447R

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 059121054C

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W0819350G

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4H0819334L

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 06M121071E

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

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 079121071CF-1

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

£47.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W0122293AE

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W0122448S

Audi A5 F5 Water Coolant Hose Line Pipe Tube 8W0122448S

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 1K0122073DD

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8J0145832H

Audi RS3 8P TT RS 8J 2.5 TFSI Intercooler Turbo Pressure Pipe Hose 8J0145832H

£56.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5Q0122101BP

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 7L0815987E

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W0819334AE

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 059121507AB

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 420121456

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

£75.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0819377C

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4M0122447J

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

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 420121073

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

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W2819377

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

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8P0121075

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

£37.95

Free delivery: Aug 05

If paid before 14:00

Part no. 03L121157AA

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. RHD-8E2819371AG

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

£37.95

Free delivery: Aug 05

If paid before 14:00

Part no. 04L121058H

Audi TT FV Q3 8U Water Hose Cooling Coolant Pipe Line 2.0 TDI Diesel 04L121058H

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8P0121109C

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W0122101H

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8P0122061

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

£37.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4G0145931G

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 07K121109

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

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4G0145909B

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 079121070BS

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 6R0122051BR

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

£56.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4G0145910B

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 06M121085H

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 04L121065AN

Audi A5 8T Water Coolant Pipe Hose Line Tube 04L121065AN

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. RHD-8W2122109E

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 03L121157AK

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. RHD-4H2820195E

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4F0121251AE

Audi A6 C6 FL Water Hose Radiator Coolant Cooling 4F0121251AE

£75.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W2819350L

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W0122449AS-1

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

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8W0819332D

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

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4H0121055AB

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

£32.95

Free delivery: Aug 05

If paid before 14:00

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