Four Seasons 86159 Engine Coolant Outlet Flange

Engine Coolant Outlet Flange for BMW Cooling Repair

Four Seasons Coolant Flange 86159 is an engine coolant outlet flange built for BMW cooling system service on select 1995-1999 318i, 318is, 318ti, and 1996-1999 Z3 applications. This plastic coolant flange includes the gasket or seal and meets or exceeds OEM requirements for direct replacement use.

Key Features

• Engine coolant outlet flange for cooling system repair
• Plastic construction for OE-style fit and function
• Gasket or seal included
• Two mounting holes and two barb-style outlet connections
• Three-port design with bypass connection
• Style without thermostat
• Meets or exceeds OEM specifications
• Fits BMW 318i, 318is, 318ti, and Z3 cooling system applications

Product Details

Four Seasons 86159 is part of the Coolant Flange line and is engineered as an engine coolant outlet flange for BMW cooling system service. The flange uses a plastic body, a non-symmetrical base, and barb attachments for the open ports. It is configured without a thermostat and includes the gasket or seal needed for sealing at the mounting surface. For buyers searching for a BMW coolant flange 86159 or a replacement engine coolant outlet flange for 1995-1999 BMW 318i, 318is, 318ti, and 1996-1999 BMW Z3 models, this part provides a direct-fit service solution.

This part cross-references URO 11531743679 for the same application.

What It Helps Repair

• Coolant leaks at the outlet flange
• Cracked or brittle plastic flange housing
• Failed sealing surface at the coolant connection
• Bypass hose connection issues at the coolant outlet
• Cooling system service on BMW E36 and Z3 applications

Installation Notes and Tips

Verify the flange style, port layout, and hose attachment points before installation. Clean the mating surface thoroughly and inspect adjacent hoses for wear, swelling, or hardening before reassembly. Because mounting hardware is not included, reuse or source the correct fasteners as needed for the vehicle. Confirm fitment for your exact BMW 318i, 318is, 318ti, or Z3 year before installation.

Quality Assurance

Four Seasons 86159 is built to meet or exceed OEM specifications for replacement cooling system service. It is intended for direct-fit repair on confirmed BMW applications and is backed by Four Seasons product engineering standards.