BMW 3 Series (E46), X3, X5 - Radiator Expansion Bottle (Side Pipe)

Description

High-performance Radiator Expansion Bottle (OEM 17137787039) engineered for the demanding cooling requirements of BMW inline-6 and performance engines.

This coolant reservoir is a critical pressure-vessel component that manages thermal expansion within the cooling system. Specifically designed with the auxiliary side pipe connection, it ensures correct coolant circulation and air bleeding for specific M54 engine configurations. Constructed from reinforced, heat-stabilized polymer, it is built to withstand the high-pressure environment of BMW cooling systems, preventing cracks and leaks common with aged factory units. It is an ideal replacement for maintaining system pressure and engine cooling efficiency under South African operating conditions.

Compatible Vehicles

BMW 3 Series (E46 / 320i / 323i / 325i / 328i / 330i / 1998 – 2005)

BMW X3 (E83 / 2.5i / 3.0i / 2003 – 2006)

BMW X5 (E53 / 3.0i / 2000 – 2006)

Specifications

OEM Reference No.: 17137787039 / 17 13 7 787 039

Alternative Part Numbers: 17132247553

Configuration: Includes Integrated Side Pipe Connection

Type: Pressurized Expansion Tank

Material: High-Grade Heat-Stabilized Reinforced Polymer

Inclusions: Bottle only (Expansion tank cap and level sensor sold separately)

Fast and reliable delivery available across South Africa.