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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Mercedes W169 W245 Water Coolant Hose Pipe Radiator A1698301596

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€22.75

Part no. 5251183

Ford Ranger Mk6 Expansion Tank Coolant Pipe Hose Line 2.2 TDCI AB39-8W005-AD

€23.95

Audi A3 8V TT FV VW Golf Mk7 Water Coolant Connector Flange Diesel 5Q0121619A

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Part no. 5Q0121619A

Audi A3 8V TT FV VW Golf Mk7 Water Coolant Connector Flange Diesel 5Q0121619A

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€22.75

Mercedes-Benz A B W169 W245 Radiator Water Cooling Pipe Hose Bottom A1695010182

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Part no. A1695010182

Mercedes-Benz A B W169 W245 Radiator Water Cooling Pipe Hose Bottom A1695010182

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€22.75

Audi A3 8V Water Hose Radiator Coolant Pipe Line Diesel 5Q0122101BE

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Part no. 5Q0122101BE

Audi A3 8V Water Hose Radiator Coolant Pipe Line Diesel 5Q0122101BE

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Part no. 6Y0122073B

Volkswagen Polo 9N Mk4 Coolant Return Hose Pipe 1.2 Petrol 6Y0122073B

€23.95

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

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Part no. 8W0122293AE

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

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Audi A6 C6 2.0 TFSI Coolant Water Heater Pipe Hose Line 4F0819378F

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Part no. 4F0819378F

Audi A6 C6 2.0 TFSI Coolant Water Heater Pipe Hose Line 4F0819378F

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Audi A5 8T A4 B8 Engine Coolant Pipe Hose Line Tube 06L121075A

€37.95

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Water Hose Mercedes Vito Viano W639 Cooling Coolant Pipe Line OM651 A6395017482

€23.95

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

€32.95

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BMW G30 G31 G32 G11 G12 Radiator Coolant Pipe Hose Line 2.0 Hybrid 7507149

€42.95

Audi A3 8V 1.6 TDI CRKB Water Coolant Pipe Hose Line Tube 5Q0122051BJ

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Part no. 5Q0122051BJ

Audi A3 8V 1.6 TDI CRKB Water Coolant Pipe Hose Line Tube 5Q0122051BJ

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Water Pipe Mercedes W204 M271 Engine Cooling Radiator Coolant Hose A2044661381

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Part no. A2044661381

Water Pipe Mercedes W204 M271 Engine Cooling Radiator Coolant Hose A2044661381

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€22.75

Part no. 1929874

Ford Kuga C520 Engine Water Hose Tube Pipe 1.5 Petrol Ecoboost F1F1-6B851-DE

€23.95

Coolant Hose Mercedes W204 W212 OM651 Diesel Heater Water Pipe A6512031482

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Part no. A6512031482

Coolant Hose Mercedes W204 W212 OM651 Diesel Heater Water Pipe A6512031482

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€22.75

Part no. 99710662103

Porsche Cayman 987C Engine Coolant Hose Tube Line Pipe Feed Left N/S 99710662103

€23.95

Mercedes W205 W213 OM654 Oil Cooler Pipe Hose Line A6542030001

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Part no. A6542030001

Mercedes W205 W213 OM654 Oil Cooler Pipe Hose Line A6542030001

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Audi A6 C6 S8 D3 Engine Water Coolant Pipe Line Tube Hose 07L121481H

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Part no. 07L121481H

Audi A6 C6 S8 D3 Engine Water Coolant Pipe Line Tube Hose 07L121481H

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€40.17

Audi TT 8J Water Coolant Hose Line Return Tube Pipe 8J0201216C

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Part no. 8J0201216C

Audi TT 8J Water Coolant Hose Line Return Tube Pipe 8J0201216C

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Part no. M8D2-8C480-BB

Land Rover Discovery Sport L550 Coolant Hose Pipe 2.2 Diesel M8D2-8C480-BB

€42.95

Part no. A1635010182

Mercedes W163 Engine Radiator Hose Tube Line Pipe ML 350 112970 A1635010182

€23.95

Seat Leon 5F Water Coolant Pipe Hose Cooling Line 2.0 TDI Diesel 5Q0122073H

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Part no. 5Q0122073H

Seat Leon 5F Water Coolant Pipe Hose Cooling Line 2.0 TDI Diesel 5Q0122073H

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Part no. 6R0122447K-1

Audi A1 8X Coolant Water Pipe Hose Line Engine Cooling 6R0122447K

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Bleed Line Mercedes W213 Diesel M656 Coolant Water Hose A2575012900

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Part no. A2575012900

Bleed Line Mercedes W213 Diesel M656 Coolant Water Hose A2575012900

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Part no. 7P0819926B

VW Volkswagen Touareg 7P 3.0 TDI Coolant Water Pipe Hose Line 7P0819926B

€23.95

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Audi A3 8V Skoda Octavia Mk3 Water Coolant Flange Pipe Hose Line 04L121131J

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Heater Coolant Hose Mercedes C253 W213 Water Pump Heater Line A2538308801

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Part no. A2538308801

Heater Coolant Hose Mercedes C253 W213 Water Pump Heater Line A2538308801

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Volkswagen Touareg 7P Preheater Pipe Hose Line 3.0 TDI 7P0121065AC

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Part no. 7P0121065AC

Volkswagen Touareg 7P Preheater Pipe Hose Line 3.0 TDI 7P0121065AC

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Part no. A2762006651

Coolant Hose Mercedes C238 Turbo Cooling Return Line A2762006051

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Water Hose Mercedes W204 C207 W212 W205 W213 M274 Coolant Line Pipe A2742031202

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Part no. A2742031202

Water Hose Mercedes W204 C207 W212 W205 W213 M274 Coolant Line Pipe A2742031202

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Coolant Hose BMW F90 M5 F92 M8 Water Cooling Pipe Line 7852352

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Part no. 7852352

Coolant Hose BMW F90 M5 F92 M8 Water Cooling Pipe Line 7852352

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Mercedes W176 M133 45 AMG Coolant Pipe Hose Line Tube A1332000551

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Part no. A1332000551

Mercedes W176 M133 45 AMG Coolant Pipe Hose Line Tube A1332000551

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BMW X5 F15 Radiator Top Coolant Pump Hose Cooling System 8515509

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Part no. 8515509

BMW X5 F15 Radiator Top Coolant Pump Hose Cooling System 8515509

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Land Rover Discovery 3 L319 Water Coolant Pipe Hose Line 2.7 V6 4H2Q-6720-CD

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Range Rover Evoque L551 Radiator Coolant Pipe Hose 2.0 Diesel M8D2-8260-AB

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BMW Mini Cooper One R50 R52 Petrol W10 Radiator Coolant Hose 7557167

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Part no. 7515489

BMW Mini Cooper One R50 R52 Petrol W10 Radiator Coolant Hose 7557167

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Volkswagen Touran 1T Water Coolant Pipe Hose Line Tube 1.4 TSI 1K0121070BB

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Part no. 1K0121070BB

Volkswagen Touran 1T Water Coolant Pipe Hose Line Tube 1.4 TSI 1K0121070BB

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Part no. 5Q0122051BA

Volkswagen Golf Gtd 5G Audi A3 8V Water Coolant Pipe Hose Tube Line 5Q0122051BA

€23.95

Mini Cooper R50 Hose Heater Radiator 6922394

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Part no. 6922394

Mini Cooper R50 Hose Heater Radiator 6922394

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Part no. 8478420

BMW F74 Gran Coupé Electric Coolant Pump Line Hose Tube B38A15P 8478420

€80.95

Coolant Hose Mercedes W177 C118 W247 Diesel OM654 Water Line A6542032801

-40%

Part no. A6542032801

Coolant Hose Mercedes W177 C118 W247 Diesel OM654 Water Line A6542032801

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€25.77

Mercedes W176 M133 A45 AMG Coolant Water Pipe Hose Line Tube A1332000582

-40%

Part no. A1332000582

Mercedes W176 M133 A45 AMG Coolant Water Pipe Hose Line Tube A1332000582

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BMW F10 X5 F15 X6 F16 Coolant Hose Cooling Water Line Diesel N57N 7827842

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Part no. 7827842-1

BMW F10 X5 F15 X6 F16 Coolant Hose Cooling Water Line Diesel N57N 7827842

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Part no. 3Q0121156D

Volkswagen Caddy SB Engine Cooling System Hose Pipe 2.0 TDI 3Q0121156D

€89.95

Volkswagen VW Touareg 7P Coolant Hose Pipes Line 3.0 TDI Diesel 7P6122051D

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Part no. 7P6122051D

Volkswagen VW Touareg 7P Coolant Hose Pipes Line 3.0 TDI Diesel 7P6122051D

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VW Volkswagen Touareg 7L Water Heater Coolant Pipe Hose Line 7L0815857C

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Part no. 7L0815857C

VW Volkswagen Touareg 7L Water Heater Coolant Pipe Hose Line 7L0815857C

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Part no. 6Y0121086F

Volkswagen Polo 9N Engine Coolant Hose Pipe Tube Line 1.2 Petrol BMM 6Y0121086F

€23.95

Part no. 06F145383N

Audi TTS 8J Turbocharger Coolant Pipe Hose Line 2.0 TFSI 06F145383N

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Water Hose BMW F10 F11 F12 F13 N63 Petrol Cooling Coolant Pipe Line 7592652

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Part no. 7592652

Water Hose BMW F10 F11 F12 F13 N63 Petrol Cooling Coolant Pipe Line 7592652

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Audi A4 B8 A5 8T A5 S5 Radiator Coolant Hose Tube Line Pipe 8K0121036E

€37.95

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

€23.95

Part no. 8841819

BMW U06 X2 U10 X1 U11 Water Coolant Return Pipe Hose Line B38X 8841819

€118.95

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Volkswagen Passat B7 Coolant Pipe Hose Line 2.0 TDI 1K0122447GF

€23.95

Part no. 4H0121055AB

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

€23.95

Audi Q3 8U Water Coolant Hose Tube Line Pipe 2.0 TDI Diesel 5Q0122073BK

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Part no. 5Q0122073BK

Audi Q3 8U Water Coolant Hose Tube Line Pipe 2.0 TDI Diesel 5Q0122073BK

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BMW 3 Series E90 E91 E92 M3 S65 Radiator Bottom Thermostat Coolant Hose 7840661

-5%

Part no. 7840661

BMW 3 Series E90 E91 E92 M3 S65 Radiator Bottom Thermostat Coolant Hose 7840661

Promo price

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€22.75

Accumulator Flange BMW X5 E53 E38 Cooling System 1702200

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Part no. 1437493

Accumulator Flange BMW X5 E53 E38 Cooling System 1702200

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Part no. 1J0121156AT

Volkswagen Golf Mk4 Audi A3 TT Heater Matrix Coolant Pipe Hose Line 1J0121156AT

€28.95

Volkswagen Touareg 7P Oil Cooler Cooling Tube Pipe Hose Line 3.0 TDI 7P0121065M

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Part no. 7P0121065M-1

Volkswagen Touareg 7P Oil Cooler Cooling Tube Pipe Hose Line 3.0 TDI 7P0121065M

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Part no. 1626837030

Toyota Auris E15 Water Coolant Pipe Hose Line 1.6 1ZR-FE 1626837030

€28.95

Mercedes W204 W212 Water Pipe OM651 Engine Cooling Coolant Hose Line A2125018282

-5%

Part no. A2125018282

Mercedes W204 W212 Water Pipe OM651 Engine Cooling Coolant Hose Line A2125018282

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Mercedes C216 W212 S212 Water Hose Coolant Cooling Pipe Line A2223270044

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Part no. A2223270044-1

Mercedes C216 W212 S212 Water Hose Coolant Cooling Pipe Line A2223270044

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€32.95

€28.01

Part no. PCH001150

Range Rover L322 Radiator Cooling Hose Pipe Line PCH001150

€23.95

Volkswagen VW Golf Mk5 Water Hose Radiator Coolant Pipe Line 1K0122058E

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Part no. 1K0122058E

Volkswagen VW Golf Mk5 Water Hose Radiator Coolant Pipe Line 1K0122058E

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Part no. 9398958

BMW G20 G21 Radiator Feed Coolant Hose Pipe Tube Line 9398958

€23.95

Part no. 4K0122055AK

Audi A6 C8 Water Coolant Pipe Hose Line 3.0 TDI 4K0122055AK

€23.95

Part no. 6R0122157L

Audi A1 8X Volkswagen Polo 6R Engine Coolant Hose Tube Line Pipe 6R0122157L

€23.95

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

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Part no. 06K121132

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

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Part no. 1K0121058D

VW Volkswagen EOS 1F Golf Gti 1K Coolant Hose Tube Line Pipe 2.0 TDI 1K0121058D

€23.95

Part no. M8A2-8B505-CB

Range Rover Velar L560 Water Coolant Hose Pipe Line 2.0 Diesel M8A2-8B505-CB

€28.95

BMW E81 E87 E90 Petrol Radiator Engine Oil Cooling Hose Pipe 7521067

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Part no. 7521067

BMW E81 E87 E90 Petrol Radiator Engine Oil Cooling Hose Pipe 7521067

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€22.75

Part no. 07K121133E

Audi RS3 8V RSQ3 F3 Water Coolant Pump Regulator Flange 2.5 TFSI 07K121133E

€23.95

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BMW U06 X1 U11 Water Coolant Feed Pipe Hose Line B38X 8841818

€23.95

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Porsche Macan 95 Audi A4 S4 8K A5 S5 8F Thermostat Quick Coupling 8K0122293AE

€23.95

Part no. 7565781

BMW 5 6 E60 E61 E63 LCI N52N N53 Radiator Coolant Return Hose Line Pipe 7565781

€47.95

Part no. A2048304496

Mercedes C204 S04 W204 Recirculation Pump Hose Tube Line Pipe A2048304496

€23.95

Part no. 5Q0122051CM

Volkswagen Golf 5G 2.0 TDI Water Hose Radiator Coolant Pipe Line 5Q0122051CM

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BMW F30 F32 LCI 330d 335dX 430d 435dX Engine Radiator Coolant Hose Pipe Line

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€22.75

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Porsche Boxster 986 Cooling Engine Water Coolant Hose Pipe 99610621206

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Part no. 059121511CT-1

Audi Q7 4M Q8 Mk2 Water Coolant Hose Line Tube Pipe 3.0 Diesel 059121511CT

€42.95

Part no. 7C0121096

Volkswagen Crafter SY Engine Water Coolant Hose Pipe Line Hose Tube 7C0121096

€32.95

Ford B-Max Water Coolant Hose Pipe Line C1B1-18K580-CA

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Part no. 1781999

Ford B-Max Water Coolant Hose Pipe Line C1B1-18K580-CA

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€22.75

Audi Q2 GA 2.0 TDI Water Hose Cooling Radiator Coolant Pipe Line 3Q0121070AG

-15%

Part no. 3Q0121070AG

Audi Q2 GA 2.0 TDI Water Hose Cooling Radiator Coolant Pipe Line 3Q0121070AG

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€24.61

Mercedes C118 Water Coolant Pipe Hose Line A6542032901

-15%

Part no. A6542032901

Mercedes C118 Water Coolant Pipe Hose Line A6542032901

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€28.01

Part no. 06F121492B

Volkswagen Golf GtI 1K Audi A3 8P Engine Coolant Hose Tube Line Pipe 06F121492B

€184.95

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Seat Lean Cupra 5F Ibiza 6P Coolant Flange Pipe Line Tube Coupling 5Q0122291DA

€23.95

VW Volkswagen Polo 6R Solid Water Coolant Pipe Hose Line Tube 03E121065A

-5%

Part no. 03E121065A

VW Volkswagen Polo 6R Solid Water Coolant Pipe Hose Line Tube 03E121065A

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Mercedes W447 M651 Diesel Water Coolant Pipe Cooling Hose A6512033482

-5%

Part no. A6512033482

Mercedes W447 M651 Diesel Water Coolant Pipe Cooling Hose A6512033482

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€22.75

Part no. CPLA-8D011-CB

Land Rover L494 Coolant Cooling Hose Pipe Line CPLA-8D011-CB

€28.95

Water Hose BMW F20 F21 F30 LCI B48 Coolant Cooling Pipe Line 9329645

-5%

Part no. 9329645

Water Hose BMW F20 F21 F30 LCI B48 Coolant Cooling Pipe Line 9329645

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€23.95

€22.75

Part no. A1332000382

Mercedes W176 Water Hose Heat Exchanger Thermostat Pipe A45 AMG A1332000382

€42.95

Volkswagen Golf Mk6 Water Hose Cooling Coolant Radiator Pipe Line 5K0121070C

-5%

Part no. 5K0121070C

Volkswagen Golf Mk6 Water Hose Cooling Coolant Radiator Pipe Line 5K0121070C

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Part no. 03L121131K

VW Transporter T5 2.0 TDI CAAA Sealing Flange Temperature Sender 03L121131K

€23.95

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

-15%

Part no. 3C0122101FL

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

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€28.01

Mercedes W906 OM646 Water Coolant Heater Return Hose Pipe Tube Line A9068322223

-5%

Part no. A9068322223

Mercedes W906 OM646 Water Coolant Heater Return Hose Pipe Tube Line A9068322223

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€23.95

€22.75

Part no. A2218320423

Mercedes-Benz S W221 Diesel OM642 Water Coolant Cooling Pipe Hose A2218320423

€23.95

Part no. 6R0121109AA

Audi A1 8X Volkswagen Polo 6R Water Coolant Pipe Hose Tube Line 6R0121109AA

€28.95

Mercedes W176 Coolant Pipe Engine Block Water Line Diesel OM651 A6512030602

-5%

Part no. A6512030602

Mercedes W176 Coolant Pipe Engine Block Water Line Diesel OM651 A6512030602

Promo price

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