Rein EPT0263 Engine Coolant Reservoir - Intercooler

Overview

Rein EPT0263 is an OE-quality engine coolant reservoir built for BMW applications that use an intercooler-mounted tank without a cap. It is formed from virgin plastic to match original equipment material standards and resist cracking from repeated heat cycles.

This Rein coolant reservoir is a direct-fit replacement for a range of BMW 530i, 540i, 740i, and 840i applications, along with related xDrive and plug-in hybrid models. Part number EPT0263 is also cross-referenced to 17139485733 for the same application.

Key Features

• OE-quality expansion tank construction for factory-style fit and function.
• Virgin plastic housing helps improve durability under heat cycling.
• Black plastic finish matches the original reservoir appearance.
• Twist-on cap design; cap is not included.
• Mounting hardware and brackets are not included.

Detailed Description

Rein Automotive designs this engine coolant reservoir to install, fit, and perform like the original component. The tank is produced from virgin plastic rather than regrind material, which helps reduce the risk of cracking and supports long-term durability in cooling-system service. For BMW 530i, 540i, 740i, 745e, and 840i fitments, EPT0263 is specified for intercooler applications and notes use without a cap.

Use EPT0263 when replacing a damaged or aging coolant reservoir on BMW cooling-system applications that require this configuration. The part number EPT0263 appears in interchange listings with 17139485733.

What It Helps Fix

• Coolant loss from a cracked reservoir housing.
• Heat-related plastic fatigue in the expansion tank.
• Leaks caused by an aging coolant reservoir.
• Fitment issues when replacing the original intercooler tank.
• Restoration of proper coolant storage in the cooling system.

Installation Notes

Verify the vehicle’s cooling-system configuration before ordering, since this reservoir is listed for intercooler applications and without a cap. Confirm the cap style, mounting points, and OE part number match the original unit before installation. EPT0263 does not include mounting hardware, mounting brackets, or a cap.

Quality Assurance

Rein positions this expansion tank as an OE-quality replacement made to match or exceed original material standards. Virgin plastic construction is used to support durability and help the reservoir withstand repeated thermal cycling.