Bilstein 44-191825 Air Suspension Strut - Rear Left
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Bilstein
 B4 OE Replacement (Air)

Bilstein 44-191825 Air Suspension Strut - Rear Left

Brand Bilstein 44-191825
Position Rear Left
Finish Black paint
Internal Design Monotube
Lower Mount Type Eye 15.5mm
Series B4 oe replacement (air)
Title Bilstein shock absorbers
Upper Mount Type Multiple studs
Product line B4 OE Replacement (Air)
Fits BMW · 8 vehicles

OE replacement. Connects directly for modification-free installation.

Monotube design. Delivers consistent damping performance and original ride feel.

OE supplier pedigree. Built to meet manufacturer standards for air suspension systems.

$488.03Free shipping
In stock · usually ships same day before 1pm CST
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Step 2 — Quantity
Air Suspension Struts are typically replaced in pairs, axle by axle.
Order total $488.03
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Free returns within 60 days if it doesn't fit when fitment is verified.
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Bilstein B4 OE Replacement Air Strut

The Bilstein B4 OE Replacement (Air) strut, part number 44-191825, is built for rear left suspension service on select BMW 7 Series models. It restores original air suspension function with a direct-connect design that matches the vehicle’s factory setup.

Compatible With 2002-2005 BMW 745i and 745Li, rear left, this air suspension strut is engineered for vehicles with self-leveling rear suspension and without electronic suspension. The B4 OE Replacement (Air) line focuses on OE-style fitment and factory-correct operation for European vehicles.

Key Features

  • Bilstein B4 OE Replacement (Air) series
  • Part number 44-191825
  • Rear left air suspension strut
  • Monotube internal design
  • Black paint finish
  • Lower mount type: Eye 15.5mm
  • Upper mount type: Multiple studs
  • Direct connection to original vehicle connectors

Product Details

Bilstein is an OE supplier for air suspension systems, and the B4 OE Replacement (Air) line is made to replace original equipment dampers on many European vehicles. This strut is designed to restore the factory ride feel and maintain the original suspension layout without modification. If you need a rear left air suspension strut for a BMW 745i or BMW 745Li, part number 44-191825 provides an OE-style replacement built around the vehicle’s original mounting and connector requirements.

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

Common Suspension Issues Addressed

  • Rear suspension sag on BMW 745i and 745Li models
  • Loss of factory ride height control in self-leveling rear suspension systems
  • Air strut wear that affects rear left damping response
  • Noise or harshness from a failing OE air suspension unit
  • Need for a direct-fit replacement without connector modification

Installation Notes

Fits 2002-2005 BMW 745i, rear left, with self-leveling rear suspension and without electronic suspension. Fits 2002-2005 BMW 745Li, rear left, with self-leveling rear suspension and without electronic suspension. Verify the vehicle’s suspension configuration and connector style before installation. Use the factory mounting points and original connectors for a modification-free replacement.

Quality Assurance

Bilstein supplies OE air suspension systems for European vehicles, and the B4 OE Replacement (Air) line is built to meet the manufacturer’s original standards for fit and function.

Related reading

This part fits 8 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelPositionNotes
2005BMW745iBaseRear LeftWith Self-Leveling Rear Suspension without Electronic Suspension; B4 OE Replacement (Air)
2005BMW745LiBaseRear LeftWith Self-Leveling Rear Suspension without Electronic Suspension; B4 OE Replacement (Air)
2004BMW745iBaseRear LeftWith Self-Leveling Rear Suspension without Electronic Suspension; B4 OE Replacement (Air)
2004BMW745LiBaseRear LeftWith Self-Leveling Rear Suspension without Electronic Suspension; B4 OE Replacement (Air)
2003BMW745iBaseRear LeftWith Self-Leveling Rear Suspension without Electronic Suspension; B4 OE Replacement (Air)
2003BMW745LiBaseRear LeftWith Self-Leveling Rear Suspension without Electronic Suspension; B4 OE Replacement (Air)
2002BMW745iBaseRear LeftWith Self-Leveling Rear Suspension without Electronic Suspension; B4 OE Replacement (Air)
2002BMW745LiBaseRear LeftWith Self-Leveling Rear Suspension without Electronic Suspension; B4 OE Replacement (Air)