Vaico V10-5531 Radiator Coolant Hose - Upper

Radiator Coolant Hose for Audi S4 and S5

The VAICO V10-5531 radiator coolant hose is an upper cooling-system hose built for specific Audi applications with OE reference 8K0121101J. With a compact molded profile and measured dimensions of 111 mm height, 189 mm length, and 200 mm width, it supports a direct-fit replacement approach for the factory cooling layout.

Compatible with Audi S4, Audi S5, and Audi A5 Quattro applications listed below, this hose is identified by part number V10-5531 and is part of the VAICO line of aftermarket replacement components.

Key Features

• Radiator coolant hose for the upper cooling circuit
• VAICO part number V10-5531
• OE reference: 8K0121101J
• Measured dimensions: 111 mm height, 189 mm length, 200 mm width
• Weight: 0.285 kg
• Fits select Audi S4, Audi S5, and Audi A5 Quattro applications

Fitment Details

• Fits 2010-2017 Audi S5, upper. Grade: Aftermarket; With OE No. 8K0121101J; VAICO.
• Fits 2010-2016 Audi S4, upper. Grade: Aftermarket; With OE No. 8K0121101J; VAICO.
• Fits 2009 Audi A5 Quattro, upper. Grade: Aftermarket; With OE No. 8K0121101J; VAICO.

What This Hose Helps Address

• Coolant leakage from a cracked or aged upper radiator hose
• Softening, swelling, or collapse of the original hose under heat and pressure
• Loss of coolant flow through the upper cooling path
• Temperature instability caused by a compromised hose connection
• Service replacement for a hose matching OE No. 8K0121101J

Installation Notes and Tips

Confirm the OE number and hose routing before installation. Match the upper position and verify the hose dimensions against the removed part to ensure proper fit on the Audi S4, Audi S5, or Audi A5 Quattro application. Inspect adjoining clamps, fittings, and coolant condition during service, and refill and bleed the cooling system according to factory procedure after installation.

Quality Assurance

VAICO supplies aftermarket replacement parts identified to OE references for specific vehicle applications. This part cross-references Genuine 8K0121101J for the same application.