Cooling system hoses and lines
More informationAt 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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Category
Subcategory
Condition
In Stock
Price
Part no. 5Q0816743D
Audi A3 8V VW Golf Mk7 Air Conditioning Hose A/C Pipe Line 5Q0816743D
€32.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 8K0133889B
Audi RS4 B8 4.0 FSI CFSA Petrol Coolant Hose Upper Top Left O/S 8K0133889B
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 4K0145947E
Audi A6 C8 A7 4G Water Coolant Pipe Hose Line 50 TFSIe 4K0145947E
€56.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
-2%
Part no. 4G0122449K
Audi A6 C7 A7 4G Water Coolant Pipe Hose Line 3.0 TDI 4G0122449K
Promo price
€23.95
€23.45
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 8E0121107AG
Audi A4 B7 2.0 TDI Water Hose Vent Coolant Radiator Pipe Line 8E0121107AG
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 06M121075L
Audi A4 B9 A5 S5 F5 Water Hose Cooling Radiator Coolant Pipe 3.0 TFSI 06M121075L
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 06M121085H
Audi A4 S4 B9 VW Touareg Water Coolant Pipe Hose Line 06M121085H
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 03L121157AH
Audi A5 S5 8F 2.0 TDI Water Hose Cooling Radiator Coolant Pipe Line 03L121157AH
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 4K0145050C
Audi A6 C8 Engine Water Coolant Pipe Hose Line 50 TFSIe 4K0145050C
€28.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 8R0819332J
Audi Q5 8R 2.0 TDI Engine Water Coolant Pipe Hose Line Diesel 8R0819332J
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 8W0819334G
Audi A4 S4 8W B9 A5 S5 F5 Heater Water Coolant Hose Pipe Line 8W0819334G
€28.95
Free delivery: Jul 29 – Aug 3
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: Jul 29 – Aug 3
If paid before 14:00
Part no. 03L121157AC
Audi A4 B8 A5 8T Water Coolant Pipe Hose Line 2.0 TDI 03L121157AC
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 1K0122051FE
Audi TT 8J MK2 Water Hose Cooling Coolant Radiator Pipe Line 1K0122051FE
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 6R0121063
Audi A1 8X Water Pipe Hose Line Engine Cooling Coolant Unit Hose 6R0121063
€23.95
Free delivery: Jul 29 – Aug 3
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: Jul 29 – Aug 3
If paid before 14:00
Part no. 8W0819342B
Audi A4 S4 B9 8W A5 S5 F5 Heater Water Coolant Hose Pipe Line 8W0819342B
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 8K1819350AT
Audi A5 8F Water Coolant Pipe Hose Line Tube 8K1819350AT
€28.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 06M145963D
Audi A5 S5 F5 Engine Coolant Return Hose Cooling Pipe 3.0 TFSI 06M145963D
€28.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 03L121101
Audi A4 B8 A5 8T A6 C7 Water Coolant Pipe Hose Line 2.0 TDI 03L121101
€23.95
Free delivery: Jul 29 – Aug 3
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: Jul 29 – Aug 3
If paid before 14:00
Part no. 6C0122109A
Audi A1 8X 1.4 TFSI Engine Water Coolant Pipe Hose Line Tube 6C0122109A
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 03C121070L
Audi A3 8P Water Hose Radiator Coolant Pipe Line Petrol 03C121070L
€23.95
Free delivery: Jul 29 – Aug 3
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: Jul 29 – Aug 3
If paid before 14:00
Part no. 079121137F
Audi S5 8T Cooling Coolant System Flange Rear Right O/S 079121137F
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 6C0122101E
Audi A1 8X 1.4 TFSI Water Coolant Pipe Hose Cooling Line 6C0122101E
€37.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 8E0121101T-1
Audi A4 B7 Upper Radiator Coolant Hose Pipe Line 3.2 AUK 8E0121101T
€37.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 04L122157BB
Audi A4 B8 A5 8T Water Coolant Pipe Line Hose Tube 2.0 TDI 04L122157BB
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 8K0819342J
Audi A5 8T 2.0 TDI Coolant Water Hose Line Cooling Tube Pipe 8K0819342J
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 6C0122073B
Cooling Line VW Polo 6C Audi A1 8X 1.6 TDI Water Coolant Pipe Hose 6C0122073B
€28.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 04L122157AQ
Audi A4 B9 A5 F5 Engine Coolant Pipe Hose 2.0 TDI Diesel 04L122157AQ
€37.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 3C0122101EN
Audi A3 8P 2.0 TDI Water Hose Radiator Coolant Pipe Line 3C0122101EN
€37.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 04E122157AC
Audi A4 B9 Turbo Charger Coolant Pipe Hose Line Tube 1.4 TFSI 04E122157CA
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 4G0121071N
Audi A7 4G8 3.0 TDI CDUC Diesel Water Coolant Hose Line Tube Pipe 4G0121071N
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 04L121065CR
Water Hose Audi A3 8V Skoda Octavia IV 1.6 TDI Coolant Line Pipe 04L121065CR
€47.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 6R0122101CA
Audi A1 8X Coolant Hose Water Pump Pipe Cooling Line 1.4 Petrol 6R0122101CA
€32.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 8K0819374Q
Audi A5 8T Water Hose Cooling Radiator Coolant Pipe Line 8K0819374Q
€32.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 4G0121081CS
Audi A6 C7 Expansion Coolant Tank Breather Vent Pipe Line 4G0121081CS
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 8R0121081N
Audi A4 B8 A5 8T Radiator Water Coolant Pipe Hose Pipe Line 2.0 TFSI 8R0121081N
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 04L121070D
Audi A3 8V 2.0 TDI Diesel Water Coolant Hose Pipe Tube Line 04L121070D
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 4G0122449
Audi A7 4G Engine Water Coolant Cooling Hose Pipe Line 3.0 TDI Diesel 4G0122449
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 4H0121088AD
Audi A8 4H Expansion Bottle Tank Radiator Hose Line Tube Pipe 4H0121088AD
€28.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 8K0819332G
Audi A4 B8 2.0 TDI Water Hose Cooling Radiator Coolant Pipe Line 8K0819332G
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 1K0122101CK
Audi Q3 8U Water Hose Cooling Radiator Coolant Pipe Line 1K0122101CK
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 03L121157E
Audi A4 S4 8K A5 S5 8T Engine Coolant Hose Tube Line Pipe 2.0 TDI 03L121157E
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 4L0145738B
Audi Q7 4L 3.0 TDI Engine Coolant Water Pipe Hose Line 4L0145738B
€32.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 1K0121109AL
Audi A3 8P Radiator Water Coolant Hose Pipe Line 1.8 FSI Petrol 1K0121109AL
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 8K0121101M
Water Pipe Audi A4 B8 A5 8T Q5 8R 2.0 TFSI Coolant Hose Line 8K0121101M
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 4K0819374R
Audi A6 C8 3.0 TDI Engine Coolant Pipe Water Hose Cooling Line Tube 4K0819374R
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 8V0121397A
Audi RSQ3 F3 Engine Water Coolant Hose Pipe Left N/S 2.5 TFSI 8V0121397A
€104.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 1K0122447HC
Volkswagen Audi Seat Skoda Water Hose Radiator Coolant Pipe Line 1K0122447HC
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 4F0819334D
Audi A6 C6 4F Heater Water Coolant Pipe Hose 3.0 TDI 4F0819334D
€113.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 04L122157BA
Audi A5 8T Heater Water Cooling Coolant Pipe Hose Line 04L122157BA
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 5Q0122101BL
Audi A3 8V 2.0 TDI Water Hose Radiator Coolant Pipe Line Diesel 5Q0122101BL
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 8W0145924P
Audi A4 B9 Water Hose Cooling Radiator Coolant Pipe Line 8W0145924P
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 8K0121049AF-1
Audi A4 B8 2.0 TDI Water Coolant Hose Tube Line Pipe 8K0121049AF
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 06J133781BE
Audi TT 8J Water Hose Cooling Radiator Coolant Pipe Line 06J133781BE
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 06J121075F-1
Audi TT 8J A3 8P VW Golf GTI 5K Sharan Coolant Hose Water Pipe Line 06J121075F
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 8V0121030B
Audi RS3 8V RSQ3 F3 Water Coolant Hose Pipe Line 2.5 TFSI 8V0121030B
€37.95
Free delivery: Jul 29 – Aug 3
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: Jul 29 – Aug 3
If paid before 14:00
Part no. 06E121065Q
Audi A4 B8 A6 C7 A7 4G A8 D3 Coolant Flange Pipe Hose Line Tube 06E121065Q
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 8K0145923B
Audi A4 S4 B8 A5 S5 8T Radiator Coolant Hose Tube Pipe Line 3.0 TFSI 8K0145923B
€23.95
Free delivery: Jul 29 – Aug 3
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: Jul 29 – Aug 3
If paid before 14:00
Part no. 04L122157BC
Audi A5 8T Heater Water Cooling Coolant Pipe Hose Line 04L122157BC
€32.95
Free delivery: Jul 29 – Aug 3
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: Jul 29 – Aug 3
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: Jul 29 – Aug 3
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: Jul 29 – Aug 3
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: Jul 29 – Aug 3
If paid before 14:00
Part no. 06E121065N
Audi Q5 8R 3.0 TFSI Water Hose Cooling Coolant Pipe Line 06E121065N
€23.95
Free delivery: Jul 29 – Aug 3
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: Jul 29 – Aug 3
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: Jul 29 – Aug 3
If paid before 14:00
Part no. 06M121137AH
Audi A4 B9 A5 F5 Water Coolant Pipe Hose Cooling Line 06M121137AH
€28.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 059131425A
Audi Q5 8R Water Cooling Coolant Pipe Line Connector Bracket 059131425A
€28.95
Free delivery: Jul 29 – Aug 3
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: Jul 29 – Aug 3
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: Jul 29 – Aug 3
If paid before 14:00
Part no. 7L8121073A
Audi Q7 4L Engine Coolant Hose Tube Line Pipe 7L8121073A
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 04L121131AD
Audi A5 8T Water Coolant Flange Pipe Hose Line 04L121131AD
€23.95
Free delivery: Jul 29 – Aug 3
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: Jul 29 – Aug 3
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: Jul 29 – Aug 3
If paid before 14:00
Part no. 04L122157BE
Audi A5 8T 2.0 TDI CNHA Water Coolant Pipe Tube Line Hose 04L122157BE
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 8P0820741A
Audi RS3 8P Refrigerant Hose Cooling Radiator Coolant Pipe Line 8P0820741A
€47.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 06E121065S
Audi A4 B8 A5 S5 8T Water Hose Cooling Coolant Pipe Line 3.0 TFSI 06E121065S
€23.95
Free delivery: Jul 29 – Aug 3
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: Jul 29 – Aug 3
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: Jul 29 – Aug 3
If paid before 14:00
Part no. 5N0121064H
Audi Q3 8U Volkswagen Tiguan 5N Coolant Hose Metal Pipe Radiator 5N0121064H
€37.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 6R0122157AA
Audi A1 8X Water Pipe Hose Line Cooling Coolant Unit Hose 6R0122157AA
€28.95
Free delivery: Jul 29 – Aug 3
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: Jul 29 – Aug 3
If paid before 14:00
Part no. 06H121065D
Audi A5 8T 2.0 TFSI Water Hose Cooling Radiator Coolant Pipe Line 06H121065D
€28.95
Free delivery: Jul 29 – Aug 3
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: Jul 29 – Aug 3
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: Jul 29 – Aug 3
If paid before 14:00
Part no. 06A121497Q
Audi TT 8N 1.8T AUM Turbo Coolant Return Feed Pipe Hose Line Tube 06A121497Q
€23.95
Free delivery: Jul 29 – Aug 3
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: Jul 29 – Aug 3
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: Jul 29 – Aug 3
If paid before 14:00
Part no. 06A121103
Audi A3 S3 8L Coolant Hose Pipe Water Pipe Engine Cooling 06A121103
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 4F0819378F
Audi A6 C6 2.0 TFSI Coolant Water Heater Pipe Hose Line 4F0819378F
€23.95
Free delivery: Jul 29 – Aug 3
If paid before 14:00
Part no. 6R0122101AQ
Audi A1 8X Coolant Cooling Engine Pipe Hose Line Radiator 6R0122101AQ
€23.95
Free delivery: Jul 29 – Aug 3
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: Jul 29 – Aug 3
If paid before 14:00
Part no. 07K121057A
Coolant Hose Audi RS3 8V TTRS 8S 2.5 TFSI Cooling Pipe Line 07K121057A
€23.95
Free delivery: Jul 29 – Aug 3
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: Jul 29 – Aug 3
If paid before 14:00
Flexible and rigid cooling hoses – durability and fit for popular models
Rubber and silicone hoses for cooling systems – temperature and pressure resistance
Cooling system hoses and pipes are key components that enable the circulation of coolant between the radiator, water pump, thermostat, and the engine. Their efficiency and tightness are essential for the proper operation of the cooling system and for preventing engine overheating. In the Global Parts automotive store, you will find a wide selection of used car parts, including cooling system hoses and pipes, ideal for brands such as BMW, Audi, Mercedes, Volkswagen, Mini, and others.
Differences between flexible and rigid cooling system hoses
Flexible cooling hoses made of EPDM rubber or silicone allow for the compensation of engine vibrations and pressure changes. Rigid pipes (e.g., aluminum or PA12 plastic) are used where shape stability and resistance to high temperatures are required – even up to 150–180°C. Modern vehicles often use a combination of both types, which ensures optimal coolant flow and a longer service life for the entire system.
What functions do cooling system hoses and pipes perform?
Cooling system hoses and pipes play a key role in regulating the engine's operating temperature:
- Coolant transport – Hoses and pipes connect key components of the cooling system, enabling the flow of coolant throughout the entire system.
- Overheating prevention – By circulating the coolant, they maintain the proper engine operating temperature, preventing it from overheating.
- Proper flexibility and tightness – The materials from which the hoses and pipes are made ensure their resistance to high temperatures, pressure, and the effects of coolant. Efficient cooling system hoses and pipes are necessary for the effective operation of the entire cooling system.
Construction and purpose of cooling system hoses and pipes
Cooling system hoses and pipes are components that connect individual fluid circuit subassemblies in the engine compartment. They are used to route coolant between the engine, radiator, heater core, thermostat, and expansion tank, and their routing depends on the engine version and mounting location. A typical component has a profile adapted to factory mounting points, ends for clamps or quick-connectors, and markings helpful for comparing OEM numbers.
Comparison of cooling hose types and verification data
| Component type | Typical construction | Application | What to check before purchase |
|---|---|---|---|
| Flexible hose | EPDM rubber or silicone, reinforcing layer | Sections exposed to vibrations and powertrain movement | End diameter, bend shape, surface condition, clamp type |
| Rigid pipe | Plastic or metal, with quick-connector sockets | Fixed flow paths near the engine or radiator | Mounting points, presence of connectors, engine version compatibility |
| Hose with vent or branch | Body with an additional outlet or tee | Connecting multiple circuits in one system | Branch layout, OEM number, sensor or vent position |
Construction and technical parameters of cooling hoses
A typical cooling system hose consists of several layers: an outer protective layer, a reinforcing layer (reinforced with synthetic fiber), and an inner layer – chemically resistant to coolants. The operating pressure of such hoses is usually 1–2 bar, with a burst strength of up to 5 bar. The use of appropriate materials prevents hoses from cracking during rapid temperature changes, especially in cars with turbocharged engines. Cooling system hoses, commonly known as radiator hoses, can be made of various materials – most often EPDM rubber or silicone, which withstand temperatures from –40°C to as high as +150°C. In high-performance vehicles, e.g., BMW M-series or Audi S-Line, silicone hoses with a reinforced textile construction are used, guaranteeing longer service life and resistance to operating pressures above 2 bar. Flexible hoses allow for the compensation of powertrain vibrations, while rigid sections (e.g., aluminum) ensure stability during high fluid flow.
The importance of connectors, joints, and cooperating elements
A cooling system connector is a rigid end of a pipe or housing to which a coolant hose is attached. It serves to tightly connect circuit elements and often works with a clamp, gasket, or quick-connector. In the case of parts such as an Audi A3 8P water connector, it is worth comparing the OEM number, connection diameter, outlet position, and compatibility with the thermostat housing or cylinder head.
Why is it worth taking care of cooling system hoses and pipes?
Damaged or worn cooling system hoses and pipes can lead to serious cooling system problems. Typical symptoms include:
- Coolant leak – Leaks in hoses or pipes can lead to fluid loss and a drop in coolant levels.
- Engine overheating – Restricted coolant flow resulting from hose damage can lead to engine overheating.
- Noises and vibrations – Improper mounting or damaged hoses can cause vibrations and noises during system operation. At Global Parts, we offer used cooling system hoses and pipes that have undergone detailed quality tests, ensuring their durability and tightness.
Symptoms of damage and cooling hose compatibility - table
| Failure symptom | Possible cause | Recommended action |
|---|---|---|
| Coolant level drop | Micro-leak in the hose | Replace the cooling system hose |
| Engine overheating | Clogged hose or kink | Check for obstructions, replace |
| Vibrations or gurgling | Loose hose mounts | Tighten clamps, check brackets |
| Low engine operating temperature | Excessive flow – lack of resistance | Check thermostat operation |
How to choose the right cooling system hoses and pipes?
When choosing cooling system hoses and pipes, pay attention to several key aspects:
- Vehicle model fitment – Every cooling system has its specific technical requirements. At Global Parts, you will find cooling system hoses and pipes perfectly matched to BMW, Audi, Mercedes, Volkswagen, Mini, and others.
- Technical condition – Ensure that the hoses and pipes are free from cracks, bulges, and other damage.
- Material resistance – Choose hoses and pipes made of materials resistant to high temperatures and operating fluids.
Part selection procedure
To correctly select a cooling system hose, it is worth using the vehicle's VIN or the part's OEM designation. In the Global Parts system, searching is done automatically by engine code or catalog number, which minimizes the risk of a mismatch. As a result, the hoses are fully compatible with the water pump, radiator, and thermostat, and the entire system maintains factory tightness.
Selecting hoses by circuit, mounts, and car version
A cooling system hose is used to route fluid exactly between indicated circuit points, which is why it is not a universal element. When choosing an element such as a radiator hose, check the mounting side, end diameters, presence of quick-connectors, and compatibility with thermostats and cooling system housings. If you are looking for a subassembly such as a hose from the radiator to the engine, it is also worth comparing the bend path, support points, and fitment to water radiators and expansion tanks.
Why choose used cooling system hoses and pipes?
Used car parts, such as cooling system hoses and pipes, are a practical solution that allows for savings while maintaining high quality. By choosing used cooling system hoses and pipes, you gain:
- Lower costs – Used components are significantly cheaper than new ones but offer equally high quality.
- Ecology – Recycling car parts supports environmental protection and reduces waste.
- Wide selection – In our store, you will find cooling system hoses and pipes for the most popular car brands.
Hose cooperation with other cooling system elements
The efficiency of hoses depends not only on the material itself but also on the condition of cooperating elements. In practice, it is worth checking connections with cooling system water pumps, the thermostat housing, the radiator, and hose clamps, and an additional source of knowledge is our guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings. Such verification makes it easier to assess whether the problem stems from the hose, a leaking connector, or improper system venting.
How to take care of cooling system hoses and pipes?
To ensure cooling system hoses and pipes work reliably for a long time, it is worth following a few rules:
- Regularly check the condition of hoses and pipes to prevent coolant leaks.
- Monitor the coolant level – a sudden drop may indicate a leak in the hoses.
- Replace damaged or worn elements on time to avoid more serious cooling system problems. If replacement is necessary, at Global Parts you will find suitable used auto parts that will restore full efficiency to your cooling system.
FAQ
| Question | Answer |
|---|---|
| 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. |
Summary: cooling system hoses and pipes at the Global Parts automotive store
Cooling system hoses and pipes are key elements ensuring efficient coolant flow and maintaining optimal engine operating temperature. The Global Parts offer includes used parts matched to vehicles from brands such as Mercedes, Audi, BMW, as well as many other manufacturers. When selecting, it is worth checking the OEM number, fuel type, condition, interchangeable numbers, and compatibility with the engine version and mounting location. We invite you to contact us – we are here to help you! For more information and interesting facts, we also invite you to visit our automotive blog.