Bilstein B4 OE Replacement Air Suspension Strut - Monotube and Twintube

 

Bilstein B4 OE Replacement Air Suspension Strut is built for customers who want to restore factory-style ride behavior on vehicles equipped with air suspension. Instead of converting the suspension away from its original design, this module helps keep the vehicle using an air-spring layout with damping and ride-height support working together.

Air suspension vehicles depend on more than a standard shock absorber. The air spring supports the vehicle, the damper controls body motion, and the module must work with the surrounding suspension system so the ride remains controlled, level, and comfortable in normal driving.

The B4 OE Replacement approach focuses on restoring the feel customers expect from a premium factory-style suspension. It is a strong choice when worn air suspension components cause sagging, poor damping, uneven ride height, warning symptoms, or a ride that no longer feels composed.

This group includes air spring modules with monotube and twintube shock absorber designs, depending on the selected application. The black painted finish supports a clean replacement appearance, while the air-spring design keeps the vehicle connected to the original suspension concept.

Fitment varies by selected application, so the correct part must be matched carefully to the vehicle, position, and suspension type. Air suspension components are often position-specific, and small differences in mounts, sensors, air fittings, and damping layout can determine whether the part fits correctly.

For customers who use their vehicle for commuting, family travel, highway miles, and loaded trips, restoring suspension stability can make a major difference in confidence. The right air suspension strut helps bring the vehicle back toward its intended balance of comfort, control, and level ride behavior.

Whether customers are upgrading for ride restoration, premium vehicle repair, highway comfort, and loaded driving, Bilstein B4 OE Replacement Air Suspension Strut delivers factory-style air suspension function with integrated damping and support. Now Available at LEER!

 

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Features & Specifications

Product Type: Air suspension strut

Brand: Bilstein

Series: B4 OE Replacement Air

Vehicle Fitment: European air suspension vehicle applications

Finish: Black paint

Internal Design: Monotube and twintube versions, depending on selected application

Reservoir: No external reservoir stated for this group

Segment: Air springs

Functionality:

• Restores air spring and shock absorber function in one replacement module.
• Helps correct ride issues caused by worn air suspension components.
• Supports factory-style ride comfort for premium vehicles with air suspension.
• Maintains the original air suspension concept instead of using a conversion approach.
• Matches monotube or twintube construction to the selected application.
• Supports consistent ride height behavior when paired with a properly working system.
• Helps improve stability, control, and comfort after worn components are replaced.

 

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Why Choose

This product is ideal for customers who want factory-style air suspension repair with a direct replacement approach.

• Integrated air spring and damper design helps restore ride support and motion control.
• B4 OE Replacement tuning is intended for customers who want original-style comfort.
• Application-specific versions help match mount layout and suspension requirements.
• Black paint provides a clean replacement finish for under-vehicle installation.
• The module supports vehicles where ride height and damping must work together.
• Replacing worn air struts can help address sagging, harshness, and poor body control.
• The design keeps the vehicle closer to its intended air suspension behavior.

 

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What's Included

• One Bilstein B4 OE Replacement air suspension strut for the selected application and position.
• Integrated air spring and shock absorber module where supplied for the selected vehicle.
• Application-specific fittings or components where supplied.

Note: Confirm included components before installation.

 

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Installation Notes

• Confirm the selected part matches the exact vehicle, suspension type, and installation position.
• Air suspension systems should be inspected for leaks, compressor issues, valve faults, and related wear before installation.
• Professional installation is recommended because air suspension components may require depressurization and system checks.
• Follow vehicle service procedures for ride-height calibration or system relearn when required.

Buyer is responsible for use in accordance with applicable vehicle, road, off-road, towing, racing, and local laws.

 

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Warranty Information

Warranty coverage is handled through Bilstein and may vary by product line, application, and installation conditions. Coverage typically requires proof of purchase and proper installation, and it commonly excludes damage from misuse, improper installation, modifications, overloading, tampering, impact damage outside warranty terms, or non-compliant use.