What is the main benefit of the composite spring perch?

The composite spring perch, made from a wear-resistant polyamide with a stainless steel insert, is designed to prevent corrosion between the perch and the strut. This ensures that you can adjust your ride height smoothly and easily over time.

How do these coilovers handle dirt and moisture?

The kit includes an elastomer bump stop with an integrated dust protection system. This feature helps to keep unwanted dirt and particulate matter away from the hardened chrome piston rod and seals, protecting the internal damper components.

Are these coilovers built for performance or comfort?

The ST X Coilover system aims to balance sporty handling with road comfort. The dampers and spring rates are tuned by engineers in Germany to match the specific vehicle application, offering a sporty feel suitable for everyday driving.

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Specifications

Brand: ST Suspensions
Part #: 13220038

ST Coilover Kit 99-03 BMW 525i/528i/540i E39 Sports Wagon w/o Factory Air Suspension

Name: ST Coilover Kit 99-03 BMW 525i/528i/540i E39 Sports Wagon w/o Factory Air Suspension
Brand: ST Suspensions
SKU: st-suspensions-st-coilover-kit-99-03-bmw-525i-528i-540i-e39-sports-wagon-w-o-fac-t14-192775
Price: 1337.15 USD
Availability: BackOrder

$1337.15

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 1999-2003 BMW 5 Series E39 Sports Wagon. ST X Coilover Kit offers adjustable ride height and sporty handling while maintaining road comfort.

Key Features

Fits 1999-2003 BMW 525i, 528i, and 540i Sports Wagon models without factory air suspension.
Composite spring perch with a stainless steel insert prevents corrosion and ensures long-lasting height adjustability.
Galvanized steel housing on the struts offers improved resistance to corrosion.
Elastomer bump stops with integrated dust protection prevent dirt and water from reaching piston rods and seals.
Dampers are tuned by ST engineers in Germany and built by KW for application-specific performance.
Ride height is adjustable using a composite spring perch and a unique trapezoidal thread pitch.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

ST Suspensions is known for providing well-built suspension components that offer a noticeable improvement in handling. This ST X Coilover kit for your 1999-2003 BMW 5 Series E39 Sports Wagon is designed to give you that sporty feel you're looking for, without sacrificing too much comfort for daily driving. It’s a straightforward way to lower your car and improve its cornering ability.

What sets these coilovers apart is the attention to detail in their construction. The spring perches are made from a durable, friction-optimized polyamide composite with a stainless steel insert. This combination helps prevent corrosion between the perch and the strut, ensuring that you can adjust your ride height smoothly for years to come. The galvanized steel struts offer solid protection against rust, and ST includes an elastomer bump stop with an integrated dust protection system. This helps keep dirt and moisture away from the hardened chrome piston rod and seals, protecting the internal damper components. The dampers themselves are tuned by ST's engineers in Germany and are built by KW, a well-known name in performance suspension, ensuring they are application-specific and ready for everyday use.

Adjusting the ride height is made easier thanks to the composite spring perch and the unique trapezoidal thread pitch on the strut body. This allows you to dial in the perfect stance for your wagon. This kit is specifically designed for E39 Sports Wagons that did not come with factory air suspension.