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 S4 B8 A5 S5 8T Radiator Coolant Hose Tube Pipe Line 3.0 TFSI 8K0145923B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2Q0122109E

Audi A1 GB Water Coolant Cooling Pipe Hose Line 1.0 TFSI Petrol 2Q0122109E

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06D121065J

Audi A4 B7 A6 C6 Coolant Hose Line Tube Pipe 2.0 TFSI 06D121065J

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2Q0122101BP-1

Audi A1 Coolant Cooling Hose Pipe Line 1.0 TFSI Petrol 2Q0122101BP

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7L8121101B

Audi Q7 4L Radiator Water Coolant Pipe Hose Line 3.0 TDI 7L8121101B

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0819377C-1

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

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2Q0122157B

Audi A1 GB Coolant Cooling Hose Pipe Line 1.0 TSI Petrol 2Q0122157B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2Q0122073H

Audi A1 GB Cooling Coolant Hose Pipe Line 1.0 Petrol Engine 2Q0122073H

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 83A121101A

Audi RSQ3 F3 Engine Coolant Hose Tube Line Pipe 2.5 TFSI QUATTRO DNWA 83A121101A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06M121137AH

Audi A4 B9 A5 F5 Water Coolant Pipe Hose Cooling Line 06M121137AH

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 079121102F

Audi S5 8T Engine Water Coolant Rubber Pipe Hose 4.2 FSI 079121102F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06L121085K

Audi A4 B8 A5 8T Water Coolant Pipe Hose 2.0 TFSI Petrol Engine 06L121085K

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7L8121073A

Audi Q7 4L Engine Coolant Hose Tube Line Pipe 7L8121073A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0121081CM

Audi A4 Avant B8 S5 8T A5 S5 Engine Coolant Hose Tube Pipe Line 8K0121081CM

€51.95

Free delivery: Aug 7 – 11

If paid before 14:00

Part no. 1K0133366BK

Audi A3 8P FL TT 8J 1.8 Petrol CDAA Water Coolant Connection Hose 1K0133366BK

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0122157CK

Audi A3 8V Water Hose Cooling Radiator Coolant Pipe Line 2.0 TDI 5Q0122157CK

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 079121065BJ

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

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0121063AA

Audi A3 8P VW Golf Mk6 Seat Altea Engine Coolant Hose 1.4 Petrol 1K0121063AA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8P0820741A

Audi RS3 8P Refrigerant Hose Cooling Radiator Coolant Pipe Line 8P0820741A

€47.95

Free delivery: Aug 7 – 11

If paid before 14:00

Part no. 8J0121447F

Audi TT 8J 1.8 Petrol CDAA Engine Coolant Vent Hose Pipe 8J0121447F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0121447AL

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03G121065R

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

€151.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0122055B-1

Audi A4 B8 Water Return Coolant Pipe Hose Line 2.0 TDI Diesel Engine 8K0122055B

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06J133781BE

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8E0121058B

Audi RS4 B7 Water Coolant Cooling Pipe Hose Line 4.2 FSI Petrol 8E0121058B

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7L8121058C

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 420260712B

Audi R8 42 Air Conditioning A/C Pipe Hose Cooling Line Tube 420260712B

€66.95

Free delivery: Aug 7 – 11

If paid before 14:00

Part no. 06D121111G

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03C121070D

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0122051FE

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 057121057

Audi Q7 4L 4.2 TDI Water Coolant Pipe Hose Line 057121057

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06A121065CQ

Audi A3 8P VW Golf Mk5 Coolant Hose Water Pipe Cooling 1.6 Petrol 06A121065CQ

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0819332M

Audi A4 B8 Water Coolant Pipe Hose Line Tube 2.0 TDI CNHC 8K0819332M

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06K121075AR

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 059121398B

Audi A4 B8 A5 8T Q7 4L Coolant Hose Line Pipe Tube 3.0 TDI Diesel 059121398B

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06K121132

Audi S3 8V Water Coolant Engine Cooling Flange Pipe Hose Line Petrol 06K121132

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L122157BJ

Audi A5 S5 8T A6 S6 4G Engine Coolant Hose Tube Line Pipe 2.0 TDI 04L122157BJ

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06E121044D

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06D121085

Audi A4 B7 2.0 TFSI BGB Turbo Water Coolant Hose Line Tube Pipe 06D121085

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0145919C

Audi A4 B8 2.0 TDI CNHC Engine Water Coolant Hose Pipe Line 8K0145919C

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 059122445F

Audi Q7 Q8 4M 3.0 TDI Engine Coolant Hose Line Tube Pipe 059122445F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 059121064D-1

Audi A5 8T Water Hose Cooling Coolant Radiator Pipe Line 3.0 TDI 059121070J

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6R0122101AQ

Audi A1 8X Coolant Cooling Engine Pipe Hose Line Radiator 6R0122101AQ

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06M121085H

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0819334BB

Audi A4 B8 2.0 TDI CNHC Water Coolant Hose Line Pipe 8K0819334BB

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0121485AA

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L121064AE

Volkswagen Seat Skoda Audi 2.0 TDI Water Coolant Pipe Hose Line 04L121064AE

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0122051CT-1

Volkswagen Golf Mk7 GTI Water Coolant Cooling Pipe Hose Line 2.0 TSI 5Q0122051CT

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0145832AH

Audi A3 8P 2.0 TDI Convertible Intercooler Air Pipe Hose Left N/S 1K0145832AH

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0121485BE

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

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L121157AQ

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

€23.95

Free delivery: Aug 10 – 11

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L121065AJ

Volkswagen Seat Skoda Audi 2.0 TDI Water Coolant Pipe Hose Line 04L121065AJ

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06D121071R

Audi A4 B7 2.0 TFSI BGB Water Coolant Hose Tube Line Pipe 06D121071R

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6C0122109E

Audi A1 8X 1.6 TDI Diesel Engine Water Coolant Pipe Hose Line Tube 6C0122109E

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0121063J

Audi TT 8J Water Coolant Hose Pipe Line Tube 1K0121063J

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0122291BM

Audi A3 8P 2.0 TDI Water Hose Radiator Coolant Pipe Line 1K0122291BM

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0121481AL

Audi A6 Avant A7 Sportback Water Coolant Hose Pipe 4G0121481AL

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L121026AF

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

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 80A145926BP

Audi Q5 FY Coolant Hose Tube Line Pipe 2.0 Diesel 80A145926BP

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0122101B

Audi A6 C7 3.0 TDI Diesel Radiator Upper Hose Line Pipe Left N/S 4G0122101B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3C0122073EG

Audi TT Mk2 8J Water Coolant Pipe Hose Line 2.0 TFSI 3C0122073EG

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0122055BD

Audi A4 B9 A5 F5 Water Coolant Radiator Pipe Hose Line 3.0 TDI 8W0122055BD

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0122101B

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

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0122101B

Water Hose Audi A4 B9 A5 F5 Cooling Coolant Radiator Pipe Line 8W0122101B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06K121075AS

VW Polo 6C GTI Audi S1 8X 1.8 2.0 TFSI Water Coolant Pipe Hose Line 06K121075S

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V0121109

Audi A3 RS3 8V 8Y Water Coolant Hose Pipe Hose Line 2.5 TFSI 8V0121109

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06D121497A

Audi A4 B7 Turbocharger Water Coolant Pipe Hose Line 2.0 TFSI 06D121497A

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5N0121064H

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

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0121109S

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0122101AE

Water Hose Audi A4 B8 A6 C7 2.0 TDI Cooling Radiator Pipe Line 4G0122101AE

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5N0121447Q

Audi Q3 8U Water Coolant Pipe Hose Line 2.0 TDI 5N0121447Q

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06A121065AP

Audi A3 8P Coolant Hose Water Pump Pipe Cooling Line 1.6 Petrol 06A121065AP

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 079121481P

Audi RS4 B8 RS5 8T Engine Cooling Pipe Line Hose 4.2 V8 Petrol 079121481P

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K0145910G

Audi A6 C8 Water Hose Coolant Cooling Pipe Line 4K0145910G

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0121081CS

Audi A6 C7 Expansion Coolant Tank Breather Vent Pipe Line 4G0121081CS

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0122101DK

Audi TT 8J 2.0 TFSI BWA Upper Radiator Coolant Hose Line Pipe Tube 1K0122101DK

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 079121036D

Audi RS4 B8 Engine Cooling Coolant Water Hose Pipe Line 079121036D

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 079121055AC

Audi RS4 B8 Engine Cooling Coolant Hose Pipe Line Front Left N/S 079121055AC

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06E121044L-1

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0121086T

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0122101JQ

Audi A3 8P VW Golf Mk6 2.0 TDI CFFB Coolant Water Hose Pipe Line 1K0122101JQ

€85.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 079121065BR

Audi RS4 B8 RS5 8T Engine Cooling Pipe Water Coolant Hose 4.2 Petrol 079121065BR

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06D121065L

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 079121071CJ

Audi RS4 B8 RS5 8T Engine Cooling Pipe Water Hose Line 4.2 V8 FSI 079121071CJ

€189.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5N0122073AC

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0145925P

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

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K1819376L

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0121049M

Water Pipe Audi A4 B8 A5 8T 2.0 TFSI Coolant Hose Line 8K0121049M

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0145920M

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

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8E0819376C

Audi RS4 B7 Engine Water Coolant Pipe Hose Line 4.2 V8 BNS 8E0819376C

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06E121044L-2

Audi S5 8T A4 S4 B8 A6 C7 Water Coolant Pipe Hose Line 3.0 TFSI 06E121044L

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0145931G

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L121058AM

VW Tiguan 5N Water Hose Cooling Coolant Pipe Line 2.0 TDI Diesel 04L121058AM

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06D121132A

Audi A4 B7 Water Coolant Flange Pipe Hose Line 2.0 TFSI 06D121133C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0145909B

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 80A121400B

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

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L121157Q

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0145910B

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

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