Steering for BMW Z4 M Roadster S54 (2003-2008)

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Your BMW's steering feel is likely one of the many reasons you chose to drive a BMW. Despite them switching to electronic power steering after E9x, we love the connection to the road every BMW provides. We have everything you need to service your BMW's steering system, from quicker ratio steering racks for the trackday warrior to upgraded factory steering wheels for your daily driver.

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Turner Straight Mount Triple Baffled Power Steering Reservoir ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Turner Motorsport - Corporate Logo
T#:9609820
Part#: 004898LA01SKT
In Stock
Sale - Save 25% $ 409.99

This product was last offered at the strikethrough price on
06-14-2026

$ 307.49 USD
Free Shipping
Sale - Save 25%
$ 409.99

This product was last offered at the strikethrough price on
06-14-2026

$ 307.49 USD
Free Shipping

Eliminate the grimy, leaky, factory BMW power steering expansion tank with a beautiful billet aluminum reservoir.
Upgraded for thermal capacity, performance and extended rack life!

Our Turner triple baffled reservoir allows you to fix the downfalls of the factory BMW power steering expansion tank without losing that factory feel. The upgraded Turner reservoir has internal baffling to prevent cavitation and air pocket to make sure your rack is getting the supply of power steering. The constant flow of power steering keeps your rack cooled, lubricated and functioning properly. Extend the life of your rack and seals for years to come with increased performance and drivability. Can be used in motorsport, off-roading and daily use applications for a truly unique and universal upgrade.

Eliminates the grimy, leaky, factory BMW power steering expansion tank with a beautiful aluminum component. Increased factory power steering performance in both feel and cooling. Factory-fit with both hoses and bracketry. Additional cooling capacity will increase fluid thermal carrying capacity before overheating. Adapters where necessary to ensure reservoir will work with to-be-designed AN hose kits as well as factory hoses. Add-on, in-line valves to allow for easy flushing of power steering fluid.

Features:

Billet aluminum construction

Eliminates the leaky factory BMW reservoir and replaces it with a billet aluminum component.

Upgraded 0.45L capacity for better cooling and reduced overflow.

Internal baffles to remove bubbles caused by pump cavitation

Compatible with factory hoses and factory bracket.

Removeable Internal mesh filter

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Power Steering Reservoir
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes!
ZF - Corporate Logo
T#:594744
Part#: 32416851217
In Stock
$ 43.21 USD
Free Shipping on orders $49 and up
To assist a car's driver in turning the steering wheel with ease, a power steering pump transfers power steering fluid under high pressure to a car's steering box. Sadly, like all technological advancements, there are issues that can arise. A cracked or leaking power steering reservoir can lead to a prematurely worn or malfunctioning power steering pump and should be replaced immediately to ensure the continued safe operation of the power steering system.
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