Audi A4, A5, Q5, RS4 - Radiator Expansion Bottle (B8)

Description

High-performance Radiator Expansion Bottle (OEM 8K0121403G) engineered for durability and precision within the pressurized cooling systems of Audi’s B8 platform.

This coolant reservoir is designed to manage thermal expansion and maintain optimal pressure levels throughout the engine’s operating range. Featuring a construction that is highly resistant to extreme temperature fluctuations and high pressure, it ensures the integrity of the cooling circuit to prevent overheating. Its robust, clear-molded plastic build makes it an ideal solution for cooling system maintenance, ensuring long-term reliability for premium performance vehicles under South African operating conditions.

Compatible Vehicles

Audi A4 / A4 Quattro (B8 / 2008 – 2015)

Audi S4 (B8 / B8.5 / 2009 – 2016)

Audi A5 / S5 (8T / 2007 – 2016)

Audi Q5 (8R / 2008 – 2017)

Audi RS4 / RS5 (B8 Models)

Specifications

OEM Reference No.: 8K0121403G / 8K0-121-403-G

Alternative Part Numbers: 8K0121403AC / 8K0121403D / 8K0121403T

Type: Pressurized Coolant Expansion Tank

Material: High-Grade Heat and Pressure Resistant Polypropylene

Fitting: Direct Replacement for B8 Chassis

Fast and reliable delivery available across South Africa.