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 TT 8J Radiator Coolant Hose Pipe Cooling Line 8J0121051L

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8U0122101

Audi RS Q3 8U Coolant Hose Upper Front With Quick Release Coupling 8U0122101

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0121096AQ

Audi A3 8P Engine Coolant Hose Tube Line Pipe 1.6 Petrol BSE 1K0121096AQ

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0121051B

Audi S3 8V VW Golf Mk7 Water Pipe Hose Engine Coolant Line 1.6 TDI 5Q0121051B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0121096BH

Audi A3 8P Water Hose Cooling Radiator Coolant Pipe Line 1K0121096BH

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06K121085M-1

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6C0122157K

Audi A1 8X Volkswagen Polo 6R Water Coolant Pipe Hose 1.0 TFSI 6C0122157K

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06E121044AB

Audi S4 B8 S5 8T Engine Coolant Pipe Water Hose Line 3.0 TFSI 06E121044AB

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7L0815985

Audi Q7 4L VW Touareg 7L Auxiliary Heater Coolant Hose Pipe 3.0 TDi 7L0815985

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03C121065L

Audi A1 8X Petrol Water Coolant Hose Pipe 03C121065L

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8U0121109

Audi Q3 RSQ3 8U Engine Water Coolant Hose Pipe Cooling Line 8U0121109

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0819334F

Audi A4 B9 35 TFSI Water Hose Cooling Radiator Coolant Pipe Line 8W0819334F

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04L121026R-1

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1J0122291C

Audi A1 8X A3 8P 8V Skoda Octavia Water Coolant Pipe Hose Line 1J0122291C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0819350A

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 07K121109A

Audi RS Q3 8U Engine Water Coolant Pipe Hose Line Tube 2.5 TFSI 07K121109A

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 05L122157CP

Audi A5 F5 Engine Coolant Pipe Hose Tube Line 2.0 TDI Diesel 05L122157CP

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04L122157BQ

Audi A5 8T 2.0 TDI CNHA Water Coolant Pipe Line Hose Tube 04L122157BQ

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 059121511G

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8J0121447D

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0122101H

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0819370C

Audi A4 B9 Water Hose Cooling Coolant Radiator Pipe Line 2.0 Petrol 8W0819370C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04L121065

Audi A3 8V Engine Water Coolant Pipe Cooling Hose Line 04L121065

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0145921Q

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0819374Q-1

Audi A5 8T Water Hose Cooling Radiator Coolant Pipe Line 8K0819374Q

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8J0121101C-1

Audi TT 8J 2.0 TFSI Water Hose Cooling Coolant Radiator Pipe Line 8J0121101C

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8N0121051E

Audi TT 8N S3 8L Water Hose Coolant Radiator Pipe Line 1.8 Petrol 8N0121051E

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5N0129637D

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G0145919AC

Water Pipe Audi A6 C7 A7 4G 2.0 TDI Hose Engine Cooling Coolant Line 4G0145919AC

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 059121598L

Audi A7 4G Twin Turbo Coolant Feed Pipe Hose Line 3.0 TDI CGQB 059121598R

€42.95

Free delivery: Nov 12 – 13

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

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0819342L

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04E121070L

Volkswagen Audi Seat Skoda Engine Plastic Water Coolant Pipe Hose 04E121070L

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7L8122096F

Audi Q7 4L Engine Coolant Hose Pipe Line Tube 7L8122096F

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 83A121102A

Audi RSQ3 F3 Engine Cooling Coolant Hose Tube Line Pipe 83A121102A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0121036F-1

Audi A4 B8 Water Hose Radiator Coolant Pipe 1.8 2.0 Petrol 8K0121036F

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0122058K

Audi S3 8V TT 8S Q3 Mk2 2.0 Petrol Engine Coolant Hose Line Tube Pipe 5Q0122058K

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0819334AP

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3B012291C-1

Audi A3 8P Water Coolant Hose Pipe Line Quick Connector 2.0 TFSI 3B012291C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0122101AA

Audi S4 B9 3.0 TFSI Petrol Coolant Water Hose Line Tube Pipe 8W0122101AA

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0121164E

Audi A4 B8 Water Pipe Hose Line Engine Cooling Coolant Unit Hose 8K0121164E

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06H133514K

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

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0121070BQ

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0121064BB

Audi A3 8V Water Pipe Hose Engine Cooling Coolant Unit Line 5Q0121064BB

€23.95

Free delivery: Nov 12 – 13

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122085G

Audi A3 8P Water Coolant Cooling System Hose Pipe Line 2.0 TFSI 1K0122085G

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K0819342J

Audi A6 C8 Engine Coolant Pipe Line Heating Hose 2.0 TFSI Hybrid 4K0819342J

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06K121492F

Audi S3 8V VW Golf Mk7 Cooling Water Hose Coolant Pipe Line 2.0 TFSI 06K121492F

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 059121064D

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

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G0819377Q

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5N0122157BG

Audi Q3 SE Mk1 Water Coolant Pipe Hose Line Tube 5N0122157BG

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04L121064AC

Audi A3 8V Engine Water Coolant Pipe Cooling Hose Line 04L121064AC

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5N0122086F

Audi Q3 SE Coolant Hose Engine Cooling System Hose Line Tube Pipe 5N0122086F

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0122073AL

Volkswagen Passat B8 Water Coolant Hose Tube Line Pipe 2.0 TDI 5Q0122073AL

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L122157AA

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0122101B-1

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 079121065BD

Audi RS4 B7 Radiator Coolant Hose Pipe Line A079121065BD

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5N0121070M

Audi A3 8P Water Hose Cooling Radiator Coolant Pipe Line 5N0121070M

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K0819460

Audi A6 C8 Engine Coolant Pipe Line Heating Hose 2.0 TFSI Hybrid 4K0819460

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5N0122073AH

Audi Q3 SE Mk1 2.0 TDI Water Coolant Pipe Hose Line Tube 5N0122073AH

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T0941717D

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0819332D

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0121101P

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0122291AH

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5N0122101AS

Audi Q3 SE Coolant Hose With Quick Release Coupling Upper 5N0122101AS

€85.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06H121057H

Audi A4 S4 B8 8K A5 S5 8F 8T Thermostat Coolant Hose Pipe Line 06H121057H

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 079121071CF-1

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

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G0121081EJ

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K0121052H

Audi A6 C8 Engine Coolant Pipe Line Heating Hose 2.0 TFSI Hybrid 4K0121052H

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6R0122051BR

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

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04E103474G

Audi A3 8V Tank Crankcase Breather Vent Pipe Line 04E103474G

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 057121073C

Audi Q7 4L 4.2 TDI Coolant Hose Pipe Hose Line 057121073C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 079121071BB

Audi RS4 B7 Radiator Coolant Hose Pipe Line A079121071BB

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K1819350AQ

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L121157AA

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06E121045E

Audi A4 B7 Water Hose Radiator Coolant Pipe Line Tube 3.2 TFSI 06E121045E

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L121071B

Coolant Pipe Audi A4 B8 A5 8T 2.0 TDI Water Cooling Line 03L121071B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 07L121070Q

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3B0122291B

Audi A1 GB A3 S3 VW Golf 5G Coolant Water Pipe Connector Coupling 3B0122291B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122109AL

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8J0121051Q-1

Audi TT Mk2 8J Water Coolant Pipe Hose Line 2.0 TDI Diesel Engine 8J0121051Q

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7L0815987E

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8J0121156A

Audi TTS 8J Radiator Coolant Hose Pipe Tube Line 2.0 TFSI Petrol 8J0121156A

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03C121070M

Audi A1 8X Water Pipe Hose Line Engine Cooling Coolant Unit Hose 03C121070M

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06E121083N

Audi A4 S4 B8 3.0 TFSI Water Hose Coolant Pipe Line Tube 06E121083N

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8R0121101G

Audi A4 B8 A5 Water Coolant Hose Pipe Line 8R0121101G

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 059121507AB

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06D121492J

Audi A4 B7 A6 C6 Engine Coolant Pipe Hose Tube Line 2.0 BWE Petrol 06D121492J

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0121049CA-1

Audi A3 8P Engine Cooling Radiator Water Coolant Pipe 1.4 TFSI CAXC 1K0121049CA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8J0121051Q

Audi TT Mk2 8J 2.0 TDI Engine Water Coolant Pipe Hose Line 8J0121051Q

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 079121070T

Audi A4 B7 4.2 V8 Coolant Pipe Hose Line Tube Cooling 079121070T

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4F0121081G

Audi A6 C6 Water Hose Coolant Cooling Tube Pipe Line 2.7 Diesel 4F0121081G

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K2819347F

Audi A6 C8 Coolant Hose Line Pipe Tube Engine Cooling 4K2819347F

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0122051CM

Audi S3 8P Water Hose Cooling Coolant Radiator Pipe Line 1K0122051CM

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K1819350AB

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 079121070BS

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0819377C

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K0122101AT

Audi A6 C8 Water Pipe Hose Line Cooling Coolant 4K0122101AT

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06L121497D

Audi A5 8T A4 B8 Water Coolant Pipe Hose Turbocharger 2.0 TFSI 06L121497D

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

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