Genuine 8K0121055N Radiator Coolant Hose - Lower

OE Lower Radiator Coolant Hose

This Genuine radiator coolant hose is a lower cooling-system hose for select Audi applications. It is identified by part number 8K0121055N and is used on specific Audi A4, A4 Quattro, A5, A5 Quattro, and allroad models with confirmed lower-hose fitment.

Key Features

• Genuine OE replacement radiator coolant hose
• Lower hose position for the cooling system
• Part number 8K0121055N for accurate ordering and fitment verification
• Direct fitment for select Audi A4 and Audi A5 platform vehicles
• Built for coolant transfer between engine and radiator circuit components

Fitment Details

• Fits 2013-2015 Audi allroad, lower.
• Fits 2009-2014 Audi A4, lower.
• Fits 2010-2014 Audi A4 Quattro, lower.
• Fits 2010-2014 Audi A5, lower.
• Fits 2011-2014 Audi A5 Quattro, lower.
• Fits 2010 Audi A5 Quattro, lower. Clutch Pressure Plate Bolt fitment for a range of engine vehicles.
• Fits 2009 Audi A4 Quattro, lower. Clutch Pressure Plate Bolt fitment for a range of engine vehicles.

What This Hose Helps Address

• Coolant leakage from a cracked or worn lower radiator hose
• Softening, swelling, or collapse in the cooling hose
• Restricted coolant flow caused by internal hose deterioration
• Overheating concerns related to a damaged coolant line
• Visible seepage at hose connections or along the hose body

Installation Notes and Tips

Verify the part number 8K0121055N against the vehicle’s VIN and cooling-system layout before installation. Inspect adjoining clamps, fittings, and nearby hoses for wear, and replace any damaged sealing surfaces during service. Confirm the hose routing matches the original lower hose path on the Audi A4, A4 Quattro, A5, A5 Quattro, or allroad application.

Quality Assurance

Genuine parts are produced to OE specifications for the listed applications, supporting proper fit and function on the confirmed Audi models.