Upgraded Metal Power Steering Reservoir for BMW 3, 5, 6, 7, 8 Series + X & Z Models (E-Chassis) – Full Metal Design, Enhanced Durability, Easy Disassembly

Tired of oily subframes and cracked plastic? This Upgraded Metal Power Steering Reservoir is a direct-fit, full-metal replacement for BMWs that use OEM reservoir 32416851217 and its superseded part numbers.

The factory plastic tank gets brittle with age, heat, and track use, leading to hairline cracks, seeping hoses, and foamed-up steering fluid. Our upgraded unit is built from high-quality metal with a serviceable, easy-to-disassemble design, giving you a reservoir that’s actually built to last the life of the car.

Designed to work with factory-style hoses and mounting points, this reservoir maintains OEM routing while dramatically improving long-term reliability. Pop the top, clean or inspect the internal screen, refresh your fluid, and reassemble — no more throwing away an entire tank just to “change the filter.”

Perfect for street-driven cars, weekend track builds, and high-mileage BMWs that deserve better than brittle plastic.

Key Features

• Full Metal Construction: Replaces the aging plastic reservoir with a robust metal housing that handles heat, vibration, and age far better than OEM.
• Easy Disassembly & Service: Designed so you can open, inspect, and clean the internal screen/filter area instead of replacing the entire unit every time.
• Direct OEM-Style Fitment: Uses factory-style hose connections and mounting points for a clean, bolt-in installation with no custom fabrication.
• Reduced Leak Risk: Stronger housing and improved sealing surfaces help address one of the most common BMW “mystery leaks.”
• Track & Street Ready: Ideal upgrade if you’ve already done a pump or rack, or if you’re refreshing your engine bay and want a long-term solution.
• Compatible with CHF11S Systems: Designed for BMW applications using Pentosin CHF 11S and ZF-style power steering systems. 

FITMENT

This upgraded reservoir is a direct replacement for BMW models that use OEM power steering reservoir 32416851217 (also superseding 32411097164, 324110141426, 32411124680, and related variants). 

• 3 Series: E30 – 3 Series (select models with ZF power steering), E36 – 318i, 318is, 318ti, 323i / is, 325i / is, 328i / is, E36 M3, E46 – 323i / Ci, 325i / Ci / Xi, 328i / Ci, 330i / Ci / Xi, E46 M3 
• 5 Series: E34 – 5 Series with ZF hydraulic steering, E39 – 525i, 528i, 530i, 540i, E60 / E61 – 525i / xi, 528i / xi, 530i / xi, 545i, 550i 
• 6 Series: E63 / E64 – 645Ci, 650i
• 7 Series: E32 – 735i, E38 – 740i, 740iL 
• X Series: E53 X5 – 3.0i, 4.4i, 4.6is, 4.8is, E83 X3 – 2.5i, 3.0i 
• Z Series: Z3 (E36/7, E36/8) – 6-cyl models sharing the ZF CHF11S reservoir design 

Important:

BMW used multiple steering setups across years and regions. Always verify compatibility by cross-checking your original part number (32416851217 or its superseded numbers) before ordering.

You can also add a small note at the bottom of the listing like:

If you’re unsure on fitment, please contact us with your VIN and we’ll be happy to confirm before you buy.

BAVMODS Part No: BAV0000021F

Please refer to the “Fitment” section in the product description for compatibility details.