Vaico V10-4289 Radiator Coolant Hose - Upper

Radiator Coolant Hose for Audi A4

Vaico V10-4289 is a curved radiator coolant hose for select Audi A4 and Audi A4 Quattro applications. It is built to match the upper hose routing used on 2002-2005 vehicles with OE reference 8E0121101J, making it a direct-fit replacement for the specified chassis ranges.

Key Features

• Curved radiator coolant hose for upper cooling system routing
• Length: 381 mm for application-specific fitment
• Height: 80 mm and width: 225 mm
• Lightweight construction at 0.394 kg
• Compatible with Audi A4 and Audi A4 Quattro upper hose applications
• Vaico part number V10-4289

Fitment and Application Details

This VAICO cooling hose is listed for 2002-2004 Audi A4, upper, and 2002-2004 Audi A4 Quattro, upper. It also fits 2005 Audi A4, upper, and 2005 Audi A4 Quattro, upper, with chassis/VIN-specific notes tied to OE No. 8E0121101J. For buyers searching for an Audi A4 upper radiator coolant hose or an Audi A4 Quattro coolant hose replacement, V10-4289 provides the specified OE-style routing and dimensions.

VAICO is the brand line used for application-focused replacement parts, and this hose follows that approach by matching the listed OE reference and vehicle-specific fitment details. The part number V10-4289 is also the key identifier for catalog lookup and cross-reference matching.

This part cross-references OE number 8E0121101J for the same application.

Common Problems This Hose Can Address

• Cracked or split upper radiator hose
• Coolant leaks at the hose body or connection points
• Softening, swelling, or heat-related hose deterioration
• Restricted coolant flow caused by a damaged hose shape
• Replacement needs after cooling system service on Audi A4 models

Installation Notes and Tips

Verify the chassis/VIN notes before ordering, especially for 2005 Audi A4 and Audi A4 Quattro applications. Compare the existing hose shape, length, and OE number 8E0121101J to confirm the correct upper hose routing. Inspect adjoining clamps, necks, and coolant system components during installation so the replacement seals properly and maintains stable coolant circulation.

Quality Assurance

Vaico V10-4289 is cataloged as an aftermarket replacement part with OE-reference-based fitment for the listed Audi A4 and Audi A4 Quattro applications. Its dimensions and curved profile are specified to support accurate replacement selection for the upper radiator hose position.