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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Part no. 03L121065K
Audi A4 B8 A5 8T 2.0 TDI Hose Thermostat Coolant Pipe Line 03L121065K
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 1K0122101DK
Audi TT 8J 2.0 TFSI BWA Upper Radiator Coolant Hose Line Pipe Tube 1K0122101DK
Promo price
£23.95
£20.36
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 04L121065AJ
Volkswagen Seat Skoda Audi 2.0 TDI Water Coolant Pipe Hose Line 04L121065AJ
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 06H121065D
Audi A5 8T 2.0 TFSI Water Hose Cooling Radiator Coolant Pipe Line 06H121065D
Promo price
£23.95
£20.36
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 8K0121164E
Audi A4 B8 Water Pipe Hose Line Engine Cooling Coolant Unit Hose 8K0121164E
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
Part no. 1K0121109AK
Audi A3 8P Water Cooling Coolant Pipe Hose Line Petrol Engine 1K0121109AK
£13.95
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 06F121065J
Audi A3 8P TT 8J VW Golf MK5 Coolant Water Pipe Hose Line 2.0 TFSI 06F121065J
Promo price
£28.95
£17.37
Free delivery: Jul 21
If paid before 14:00
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Part no. 5Q0122051EG
Audi A3 8V Water Coolant Pipe Radiator Hose Cooling Fluid Line 5Q0122051EG
Promo price
£28.95
£17.37
Free delivery: Jul 21
If paid before 14:00
Part no. 1K0122063J
Audi TT 8J A3 8P Skoda Octavia II 2.0 TFSI Water Coolant Pipe Hose 1K0122063J
£14.95
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 06J121065F
Audi TT 8J A3 8P A4 8K Water Hose Cooling Coolant Radiator Pipe Line 06J121065F
Promo price
£28.95
£24.61
Free delivery: Jul 21
If paid before 14:00
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Part no. 03L121071B
Coolant Pipe Audi A4 B8 A5 8T 2.0 TDI Water Cooling Line 03L121071B
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 06K121085M
Audi VW Seat 2.0 TFSI Petrol Water Pipe Engine Coolant Hose Line 06K121085M
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 1K0121070AQ
Audi TT 8J 2.0 TFSI Water Hose Coolant Pipe Line 1K0121070AQ
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 1K0122109BB
Audi A3 8P Coolant Reservoir Expansion Overflow Line Pipe Hose Tube 1K0122109BB
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
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Part no. 8E0121049AC
Audi A4 B7 Water Hose Cooling Radiator Coolant Pipe Line 2.0 Diesel 8E0121049L
Promo price
£28.95
£24.61
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 06F121065H
Audi A3 8P TT 8J VW Golf GTI 2.0 TFSI Coolant Water Pipe Hose Line 06F121065H
Promo price
£32.95
£28.01
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 5Q0122073AB
Audi A3 8V 2.0 TFSI Water Coolant Hose Tube Line Pipe 5Q0122073AB
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 03L121157AH
Audi A5 S5 8F 2.0 TDI Water Hose Cooling Radiator Coolant Pipe Line 03L121157AH
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 8K0819334BB
Audi A4 B8 2.0 TDI CNHC Water Coolant Hose Line Pipe 8K0819334BB
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 4G0122101AE
Water Hose Audi A4 B8 A6 C7 2.0 TDI Cooling Radiator Pipe Line 4G0122101AE
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 5Q0121070BQ
Audi S3 8V Water Hose Engine Coolant Cooling Pipe Line 5Q0121070BQ
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
Part no. 5Q0122073BK
Audi Q3 8U Water Coolant Hose Tube Line Pipe 2.0 TDI Diesel 5Q0122073BK
£13.95
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 8K1819376J
Audi A5 8T 2.0 TFSI Water Hose Cooling Coolant Radiator Pipe Line 8K1819376J
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
Part no. 5Q0122157CK
Audi A3 8V Water Hose Cooling Radiator Coolant Pipe Line 2.0 TDI 5Q0122157CK
£18.95
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 03L121132AC
Audi A4 B8 A5 8T 2.0 TDI Water Coolant Thermostat Housing 03L121132AC
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 5Q0121058R
Audi VW Seat Skoda Water Hose Cooling Radiator Coolant Pipe Line 5Q0121058R
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 03L122157Q
Audi A4 B8 A5 8T Coolant Pipe Water Cooling Line 2.0 TDI 03L122157Q
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 5Q0122101GH
Audi A3 8V 35 TDI DFGA Water Coolant Hose Line Pipe Tube 5Q0122101GH
Promo price
£37.95
£32.26
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 04L121064AE
Volkswagen Seat Skoda Audi 2.0 TDI Water Coolant Pipe Hose Line 04L121064AE
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 8K0121049M
Water Pipe Audi A4 B8 A5 8T 2.0 TFSI Coolant Hose Line 8K0121049M
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 06K121132
Audi S3 8V Water Coolant Engine Cooling Flange Pipe Hose Line Petrol 06K121132
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 7L8121073J
Audi Q7 4L 3.0 TDI Coolant Hose Radiator Pipe Water Cooling Line 7L8121073J
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 8E0121049L
Audi A4 B7 2.0 Petrol Water Hose Cooling Radiator Coolant Pipe Line 8E0121049L
Promo price
£28.95
£17.37
Free delivery: Jul 21
If paid before 14:00
Part no. 8E0121101AA
Audi A4 B7 2.0 TDI Water Hose Cooling Coolant Radiator Pipe Line 8E0121101AA
£18.95
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 1K0122073GF
Audi A3 8P Water Hose Cooling Coolant Radiator Pipe Line 1K0122073GF
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 06K121075Q
Audi S3 8V Water Hose Cooling Coolant Radiator Pipe Line 06K121075Q
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 8R0122055
Audi Q5 8R Heater Water Cooling Coolant Pipe Hose Line 8R0122055
Promo price
£47.95
£28.77
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 8R0121081AQ
Audi Q5 8R Expansion Coolant Radiator Hose Pipe Tube Line Cooling 8R0121081AQ
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
Part no. 5Q0121058AE
VW Polo GTI AW Audi A3 8V Water Hose Cooling Coolant Pipe 2.0 TFSI 5Q0121058AE
£13.95
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 8K0819332M
Audi A4 B8 Water Coolant Pipe Hose Line Tube 2.0 TDI CNHC 8K0819332M
Promo price
£32.95
£19.77
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 8W0122101AL
Audi A5 8T Coolant Water Hose Line Tube Pipe 2.0 TDI Diesel 8W0122101AL
Promo price
£23.95
£14.37
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 8K0145919C
Audi A4 B8 2.0 TDI CNHC Engine Water Coolant Hose Pipe Line 8K0145919C
Promo price
£47.95
£28.77
Free delivery: Jul 21
If paid before 14:00
Part no. 4G0122449D
Audi A7 4G Engine Water Coolant Cooling Hose Pipe Line 3.0 TDI 4G0122449D
£32.95
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 03C121070L
Audi A3 8P Water Hose Radiator Coolant Pipe Line Petrol 03C121070L
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 8W0122055AM
Audi S4 B9 Turbo Coolant Hose Line Tube Pressure Pipe 3.0 Petrol 8W0122055AM
Promo price
£23.95
£14.37
Free delivery: Jul 21
If paid before 14:00
Part no. 8W0122101B-1
Audi A4 B9 A5 F5 Water Hose Cooling Coolant Radiator Pipe Line 8W0122101B
£18.95
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 5Q0121619D
Audi A3 8V Water Hose Cooling Coolant Radiator Pipe Line 5Q0121619D
Promo price
£56.95
£48.41
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 8K0121055B
Water Hose Cooling Audi A4 S4 8B A5 S5 8T Radiator Coolant Pipe Line 8K0121055B
Promo price
£28.95
£24.61
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 8K0121049L
Audi A4 B8 Water Hose Radiator Coolant Pipe Line 2.0 TDI 8K0121049L
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 03C121497F
Audi A1 8X Water Pipe Hose Line Engine Cooling Coolant Unit Hose 03C121497F
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 7L6122051T
Audi Q7 4L 3.0 TDI BUG Water Coolant Hose Pipe Line Tube 7L6122051T
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 5Q0122073R
Audi A3 8V Water Hose Coolant Pipe Line Tube 5Q0122073R
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 06E121083N
Audi A4 S4 B8 3.0 TFSI Water Hose Coolant Pipe Line Tube 06E121083N
Promo price
£32.95
£19.77
Free delivery: Jul 21
If paid before 14:00
Part no. 8E0121107AG
Audi A4 B7 2.0 TDI Water Hose Vent Coolant Radiator Pipe Line 8E0121107AG
£13.95
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 6C0122109A
Audi A1 8X 1.4 TFSI Engine Water Coolant Pipe Hose Line Tube 6C0122109A
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. RHD-4G2122449A
Audi A6 C7 A7 4G Water Coolant Pipe Line Hose 3.0 TDI 4G2122449A
Promo price
£23.95
£20.36
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 1K0133366BK
Audi A3 8P FL TT 8J 1.8 Petrol CDAA Water Coolant Connection Hose 1K0133366BK
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 6C0122073B
Cooling Line VW Polo 6C Audi A1 8X 1.6 TDI Water Coolant Pipe Hose 6C0122073B
Promo price
£23.95
£14.37
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 5Q0121064BB
Audi A3 8V Water Pipe Hose Engine Cooling Coolant Unit Line 5Q0121064BB
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 1K0121063J
Audi TT 8J Water Coolant Hose Pipe Line Tube 1K0121063J
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
Part no. 5Q0122101BL
Audi A3 8V 2.0 TDI Water Hose Radiator Coolant Pipe Line Diesel 5Q0122101BL
£13.95
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 04L122157BC
Audi A5 8T Heater Water Cooling Coolant Pipe Hose Line 04L122157BC
Promo price
£28.95
£17.37
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 04L121131AD
Audi A5 8T Water Coolant Flange Pipe Hose Line 04L121131AD
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 4G0121071N
Audi A7 4G8 3.0 TDI CDUC Diesel Water Coolant Hose Line Tube Pipe 4G0121071N
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 06J121075F
Audi TT 8J A3 8P Petrol Coolant Hose Diesel Water Pipe Line Tube 06J121075F
Promo price
£23.95
£14.37
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 4F0121055J
Audi A6 C6 Water Hose Coolant Cooling Tube Pipe Line 4F0121055J
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 06D121071R
Audi A4 B7 2.0 TFSI BGB Water Coolant Hose Tube Line Pipe 06D121071R
Promo price
£23.95
£14.37
Free delivery: Jul 21
If paid before 14:00
Part no. 03L121157AQ
Audi A4 B8 A5 8T 2.0 TDI Water Hose Cooling Radiator Pipe Line 03L121157AQ
£13.95
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 8V0122480
Audi Q3 RSQ3 F3 Petrol Water Pipe Engine Cooling Coolant Hose Line 8V0122480
Promo price
£47.95
£28.77
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 8J0121109A
Audi TT 8J 2.0 TFSI Water Hose Cooling Coolant Radiator Pipe Line 8J0121109A
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 5Q0121051K
Audi S3 8V Water Pipe Hose Engine Coolant Cooling Line 5Q0121051K
Promo price
£32.95
£19.77
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 03G121065R
Audi A4 B7 2.0 TDI BRE Water Coolant Pipe Hose Line 03G121071A
Promo price
£142.95
£85.77
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 8K0121055N
Audi A4 B8 A5 8T 1.8 2.0 TFSI Petrol Engine Water Coolant Pipe Hose 8K0121055N
Promo price
£28.95
£17.37
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 8R0121101J
Audi Q5 8R 2.0 TDI Coolant Water Hose Line Tube Pipe 8R0121101J
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 1K0122447HC
Volkswagen Audi Seat Skoda Water Hose Radiator Coolant Pipe Line 1K0122447HC
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 1K0122063G
Audi S3 8P 2.0 TFSI CDLA Petrol Engine Water Coolant Pipe Hose Line 1K0122063G
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 8W0145947E
Audi A4 B9 A5 F5 2.0 TDI Diesel Engine Water Coolant Pipe Hose Line 8W0145947E
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 1K0122051GL
Audi S3 8P VW Golf VI Water Coolant Hose Radiator Pipe Line 2.0 TFSI 1K0122051GL
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 4F0121101G
Audi A6 C6 Water Hose Cooling Radiator Coolant Pipe Line 4F0121101G
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 8W0121400B
Audi A4 B9 Oil Coolant Hose Pipe Line Tube 8W0121400B
Promo price
£28.95
£17.37
Free delivery: Jul 21
If paid before 14:00
Part no. 8K0819350D
Audi A4 B8 A5 8T Coolant Cooling Hose Pipe Line Tube 2.0 TDI 8K0819350D
£18.95
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 1K0122101GQ
Audi A3 8P 1.4 TFSI CAXC Water Coolant Pipe Hose Line 1K0122101GQ
Promo price
£23.95
£14.37
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 4G0819377M
Audi A6 C7 A7 4G 3.0 TFSI Coolant Water Hose Pipe Line Tube 4G0819377M
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 8K0819374S
Audi A4 B8 A5 8T 2.0 TDI Heater Valve Coolant Pipe Hose 8K0819374S
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 80A122101AD
Audi SQ5 FY 3.0 TDI CWGD Water Coolant Pipe Hose Line Tube 80A122101AD
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 1K0121087E
Audi A3 8P 1.6 MPI BSE Coolant Flange Pipe Hose Line Tube 1K0121087E
Promo price
£13.95
£13.25
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 8K0819857B
Audi A5 8T Water Pipe Hose Line Engine Cooling Coolant Unit Hose 8K0819857B
Promo price
£23.95
£14.37
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 8E0121044N
Audi A4 S Line Radiator Coolant Hose Line Pipe Tube Water Cooler 8E0121044N
Promo price
£47.95
£28.77
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 1K0122109AS
Audi A3 8P Engine Water Coolant Pipe Hose Line 1.4 TFSI CAXC Petrol 1K0122109AS
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 8K1819350AQ
Audi A4 S4 B8 Water Hoses Cooling Coolant Radiator Pipes 3.0 TFSI 8K1819350AQ
Promo price
£37.95
£22.77
Free delivery: Jul 21
If paid before 14:00
Part no. 059121065EA
Audi A4 B9 A5 F5 Water Hose Cooling Coolant Radiator Pipe 3.0 TDI 059121065EA
£18.95
Free delivery: Jul 21
If paid before 14:00
Part no. 4M0819350F
Audi Q7 4M Q8 Mk2 VW Touareg Mk3 Water Coolant Hose Line Tube Pipe 4M0819350F
£18.95
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 8K0819377AA
Audi A5 8T Water Hose Cooling Radiator Coolant Pipe Line 8K0819377AA
Promo price
£28.95
£17.37
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 8K0819376AC
Audi A5 8T Coolant Water Hose Line Tube Pipe 3.0 TDI Diesel Engine 8K0819376AC
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-40%
Part no. 4K0122101BJ
Audi A6 C6 Water Pipe Hose Line Cooling Coolant 4K0122101BJ
Promo price
£37.95
£22.77
Free delivery: Jul 21
If paid before 14:00
-5%
Part no. 3AA122073A
Audi TT 8J Engine Coolant Hose Pipe Line Tube Quick Release Coupling 3AA122073A
Promo price
£13.95
£13.25
Free delivery: Jul 21
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: Jul 21
If paid before 14:00
-15%
Part no. 8K0819373K
Audi A5 8T Coolant Water Hose Line Tube Pipe 8K0819373K
Promo price
£18.95
£16.11
Free delivery: Jul 21
If paid before 14:00
-15%
Part no. 8K0819374
Audi A4 B8 2.0 TDI Diesel Water Pipe Engine Cooling Coolant Hose Line 8K0819374
Promo price
£18.95
£16.11
Free delivery: Jul 21
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.