KPALAG Engine Coolant Overflow Hose for Audi A6/A7 Quattro (2012-2018) – 4G0121081AE/CT

Overview

Introducing the KPALAG Engine Coolant Overflow Hose, a purpose built replacement designed for select Audi A6 and A7 models. Crafted from PA12 rubber, it delivers solid chemical and hydrolysis resistance while remaining flexible enough to fit around tight engine components. The hose also offers effective vibration damping, contributing to a steadier, quieter cooling loop. With a broad operating range, it is built to perform from frosty mornings to hot engine summers without compromising flow.

Key benefits at a glance

• Excellent chemical and hydrolysis resistance for long service life.
• Low temperature impact resistance with a wide range of -40°C to +150°C.
• Lightweight and flexible design for easier routing and potential weight reduction.
• Effective vibration damping to minimize movement within the cooling loop.

Exact fit and compatibility

This hose replaces part numbers 4G0121081AE, 4G0121081EJ, and 4G0121081CT. It is compatible with the following vehicles and configurations:

• 2012–2015 Audi A6 2.0L L4 Gas
• 2013–2015 Audi A6 Quattro 2.0L L4 Gas
• 2012–2018 Audi A6 Quattro 3.0L V6 Gas
• 2014–2016 Audi A6 Quattro 3.0L V6 Diesel
• 2012–2018 Audi A7 Quattro 3.0L V6 Gas
• 2014–2016 Audi A7 Quattro 3.0L V6 Diesel

What it does

The expansion hose feeds coolant back to the overflow tank within a closed loop cooling system. This helps prevent coolant loss and overheating under normal driving conditions.

Easy installation

Designed with standard end fittings at each side, this hose is meant for a straightforward replacement. Before you start, ensure the coolant is fully cooled and follow basic safety precautions during replacement.

Why choose KPALAG

KPALAG focuses on durable, automotive grade materials and user friendly design. This hose aims to deliver reliable cooling system support in a compact, modern engine bay.