IRONTREE Water Pump Kit for BMW L6 Engines — 252-284 Direct-Fit with Gasket, OE-Style Tested

This IRONTREE water pump kit supplies the pump, gasket and tested components needed to restore coolant circulation and sealing on many BMW 2.0L, 2.5L and 3.0L inline-six engines. Manufactured to meet tight dimensional and functional tolerances, the kit is designed for a straightforward swap into compatible models — from classic E36/E46 cars to later E90/E60 and Z4 variants that use the 6-cylinder family.

Which BMW models and engines will this pump fit?

This pump covers a broad selection of BMW vehicles that use 2.0L–3.5L inline-six engines across multiple series and model years. Check your engine code and production year against the included application list before ordering to ensure correct fitment.

• Compatible with many 3 Series (320i, 323i/ci/is, 325i/ci/is/xi, 328i/ci/is, 330i/ci/xi, 335i)
• Also fits 5 Series (525i, 528i, 530i, 535i), 6/7 Series models and M3 variants
• Used on X and Z models (X3, X5, Z3, Z4) with L6 engines listed in the application table
• Supports select ACTIVEHYBRID models with 3.0L L6 electric/gas powertrains

How does the IRONTREE pump compare to an OEM unit?

IRONTREE builds this pump to OE-style dimensions and tests each unit for function and leakage to match the reliability expected from factory components. Critical internals such as bearings, impeller and mechanical seals are upgraded or inspected to meet durability standards, while housings are cast to maintain proper mounting and coolant flow.

• 100% function and leak-tested before shipment
• Improved bearing and seal components for longer service life
• Form, fit and function designed to match original mounting points
• Includes the required gasket to prevent installation leaks

What should I expect during installation and maintenance?

Installation is intended to be a direct replacement when the correct pump part number is selected for your vehicle; the kit contains the pump and gasket needed for a trouble-free swap. Follow manufacturer torque specs and coolant bleeding procedures, and replace worn hoses or thermostat while the cooling system is drained to minimize future service needs.

• Direct-fit design reduces modification or machining
• Replace coolant and bleed system after installation
• Inspect belts, hoses and thermostat while access is open
• Use OEM-equivalent torque values and sealing practices

What warranty and quality assurances come with the kit?

IRONTREE offers a factory-direct warranty to back the product against defects, reflecting the brand’s confidence in its production and testing processes. The pump is produced under controlled quality standards and carries a multi-year/mileage warranty for peace of mind when fitted to compatible BMW models.

• 3-year or 50,000-mile warranty (confirm fitment before purchase)
• Built to strict manufacturer quality control procedures
• Every unit checked for leaks and operational integrity
• Factory-direct pricing with included gasket for installation

Who is this for: This IRONTREE water pump kit is aimed at BMW owners, independent mechanics and restoration specialists who want a dependable, OE-style replacement for inline-six cooling systems. It’s especially suitable for those servicing E36/E46/E90 platforms, X and Z series models, or any compatible BMW listed in the application guide who require a complete pump and gasket package with tested components and a solid warranty.