REIN Coolant Hose - Expansion Tank

This REIN coolant hose runs from the automatic transmission cooler to the bottom of the expansion tank, specifically designed for BMW models including the 540i (1999-2003 E39), 740i/740iL (1998-2001 E38), and 750iL (1998-2001 E38). It is a direct replacement for the original plastic hose and is made from durable materials to prevent cracking. When replacing this hose, it is recommended to inspect and replace plastic hose flanges as they are prone to failure.

Key Features & Benefits

• Direct Replacement: Engineered to match the original hose routing and connections.
• Handles Hot Fluid: Designed to withstand high-temperature coolant and transmission fluid.
• Durable Construction: Made from reinforced rubber instead of brittle plastic for longer life.
• Includes Sealing O-Rings: Often supplied with new o-rings for a leak-free seal.
• Comprehensive Kit: Replaces both transmission cooler to expansion tank hose and often includes needed hardware.

Vehicle Fitment

Technical Specifications

Installation Notes

Recommended to inspect and replace plastic hose flanges during installation for a complete cooling system overhaul.

About REIN

REIN Automotive is a trusted manufacturer of cooling system components for European vehicles, known for quality and reliability.

This part also goes by the following cross reference.

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