Porsche 986 Boxster Coolant Expansion Tank - Used Original Parts

Diagnosis and Common Symptoms

From a workshop perspective, the 986 Boxster coolant expansion tank is a primary failure point due to age and heat cycles. The original plastic becomes brittle, leading to hairline cracks that are often difficult to spot with the naked eye. These cracks typically appear along the seams or near the hose connections.

Common symptoms of a failing tank include a persistent low coolant warning light on the dashboard, the distinct sweet smell of antifreeze after a drive, and visible coolant puddles on the ground, usually located near the right rear wheel well. In advanced stages of failure, this can lead to engine overheating as the system can no longer maintain pressure, posing a significant risk to the engine.

Introduction

This is a Genuine Porsche Coolant Expansion Tank sourced from a professionally dismantled 986 Boxster. Each tank undergoes a rigorous inspection and pressure test in our workshop to ensure it is free from the common cracks and leaks that plague these components. We verify its structural integrity, so you are installing a reliable part that performs as intended by the factory.

Product Details

• Brand: Porsche
• Model Compatibility: 986 Boxster (1997-2004)
• Part Name: Coolant Expansion Tank / Coolant Reservoir
• Condition: Genuine Used (Tested Working)
• Notes: Unit has been pressure-tested to hold 1.5 bar (22 PSI) without leakage. We strongly recommend installing a new expansion tank cap during installation, as the old cap's pressure relief valve is a common point of failure.