Bilstein 44-291037 Air Suspension Strut - Front Left
OE Quality 60-Day Returns
Bilstein
 B4 OE Replacement (Air)

Bilstein 44-291037 Air Suspension Strut - Front Left

Brand Bilstein 44-291037
Position Front Left
Boot Included No
Finish Black paint
Internal Design Monotube
Lower Mount Type Clevis
Series B4 oe replacement (air)
Title Bilstein shock absorbers
Upper Mount Type Special
Product line B4 OE Replacement (Air)
Fits Mercedes-Benz · 15 vehicles

OE replacement. Connects directly to original connectors for modification-free installation.

Monotube design. Delivers consistent damping in a refined air suspension strut.

OE supplier pedigree. Built by Bilstein for original-equipment air suspension standards.

Cross-references 166 320 25 13, 166 320 49 66 and 166 320 49 66 80 for the same application. See all 3.

$1,112.00Free shipping
Out of stock
Step 1 — Confirm fitment
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Step 2 — Quantity
Air Suspension Struts are typically replaced in pairs, axle by axle.
Order total $1,112.00
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Air Suspension Strut options

Bilstein B4 OE Replacement Air Strut

Restore the original front suspension feel on select Mercedes-Benz GLS and GL models with the Bilstein B4 OE Replacement (Air) strut, part number 44-291037. This air suspension strut is built for direct connection to the factory system and is engineered for vehicles without electronic suspension.

  • Bilstein B4 OE Replacement (Air) series
  • Front left air suspension strut
  • Monotube internal design
  • Black paint finish
  • Lower mount type: clevis
  • Upper mount type: special
  • Boot not included

OE-Style Replacement Design

The Bilstein B4 OE Replacement (Air) line is made for drivers who want a factory-style repair for air suspension wear. Bilstein supplies OE air suspension systems for many European vehicles, and this replacement damper is built to meet the original vehicle standards while connecting directly to the factory connectors. For Mercedes-Benz GLS450, GLS550, GLS350d, GL350, and GL450 applications, 44-291037 supports a clean, modification-free replacement on the front left corner.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Vehicle Fitment

  • Fits 2017-2019 Mercedes-Benz GLS450, front left, without electronic suspension; B4 OE Replacement (Air)
  • Fits 2017-2019 Mercedes-Benz GLS550, front left, without electronic suspension; B4 OE Replacement (Air)
  • Fits 2017 Mercedes-Benz GLS350d, front left, without electronic suspension; B4 OE Replacement (Air)
  • Fits 2013-2016 Mercedes-Benz GL350, front left, without electronic suspension; B4 OE Replacement (Air)
  • Fits 2013-2016 Mercedes-Benz GL450, front left, without electronic suspension; B4 OE Replacement (Air)

Common Problems This Part Addresses

  • Front left air strut leakage
  • Uneven ride height at one corner
  • Excessive bounce or reduced damping control
  • Factory suspension warning symptoms related to worn air strut hardware
  • Loss of original ride quality on Mercedes-Benz GLS and GL models

Installation Notes and Quality

Verify the vehicle is equipped without electronic suspension before ordering. Confirm the front left position and match the original connector style, lower clevis mount, and special upper mount before installation. Professional installation is recommended for air suspension service to ensure proper system function and ride-height calibration.

Bilstein B4 OE Replacement (Air) dampers are engineered as direct-fit OE replacement components for European applications, with construction and fitment focused on restoring factory ride characteristics.

Related reading

This part fits 15 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelPositionNotes
2019Mercedes-BenzGLS4504MaticFront LeftWithout Electronic Suspension; B4 OE Replacement (Air)
2019Mercedes-BenzGLS5504MaticFront LeftWithout Electronic Suspension; B4 OE Replacement (Air)
2018Mercedes-BenzGLS4504MaticFront LeftWithout Electronic Suspension; B4 OE Replacement (Air)
2018Mercedes-BenzGLS5504MaticFront LeftWithout Electronic Suspension; B4 OE Replacement (Air)
2017Mercedes-BenzGLS350d4MaticFront LeftWithout Electronic Suspension; B4 OE Replacement (Air)
2017Mercedes-BenzGLS4504MaticFront LeftWithout Electronic Suspension; B4 OE Replacement (Air)
2017Mercedes-BenzGLS5504MaticFront LeftWithout Electronic Suspension; B4 OE Replacement (Air)
2016Mercedes-BenzGL350Bluetec 4MaticFront LeftWithout Electronic Suspension; B4 OE Replacement (Air)
2016Mercedes-BenzGL4504MaticFront LeftWithout Electronic Suspension; B4 OE Replacement (Air)
2015Mercedes-BenzGL350Bluetec 4MaticFront LeftWithout Electronic Suspension; B4 OE Replacement (Air)
2015Mercedes-BenzGL4504MaticFront LeftWithout Electronic Suspension; B4 OE Replacement (Air)
2014Mercedes-BenzGL350Bluetec 4MaticFront LeftWithout Electronic Suspension; B4 OE Replacement (Air)
2014Mercedes-BenzGL450BaseFront LeftWithout Electronic Suspension; B4 OE Replacement (Air)
2013Mercedes-BenzGL350Bluetec 4MaticFront LeftWithout Electronic Suspension; B4 OE Replacement (Air)
2013Mercedes-BenzGL450BaseFront LeftWithout Electronic Suspension; B4 OE Replacement (Air)
Directly replaces or cross-references 3 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
166 320 25 13166 320 49 66166 320 49 66 80