Bilstein 22-145277 Suspension Strut Assembly - Front Left

Bilstein B4 OE Replacement Front Left Strut

The Bilstein B4 OE Replacement suspension strut assembly is built to restore original ride quality and handling on select BMW applications. This front left unit is engineered to meet or exceed OE standards while delivering the consistent control expected from Bilstein shock absorbers.

Compatible with 2007-2013 BMW 328i, front left, and 2011-2013 BMW 335i and 335is, front left, this part number 22-145277 is a direct-fit OE-style replacement for sport suspension applications listed below.

Key Features

• Bilstein B4 OE Replacement series for factory-style ride restoration
• Suspension strut assembly for the front left position
• Twintube internal design for controlled damping response
• Black paint finish
• Upper stem mount and lower base cup mount configuration
• No boot included
• Part number 22-145277

Product Details

Bilstein B4 OE Replacement dampers are developed for drivers who want to return the vehicle to original ride characteristics without changing the factory suspension feel. This strut assembly is designed around OE standards and uses a twintube construction to support stable, predictable damping on the road. For BMW 328i, BMW 335i, and BMW 335is models with the listed front left fitment, 22-145277 provides a direct replacement option that aligns with the original suspension layout.

This part cross-references BMW OE numbers 31 30 6 777 231 and 31 31 6 786 015 for the same application.

What This Strut Helps Address

• Excessive front-end bounce after the original strut wears out
• Reduced steering precision and road control
• Uneven damping response on the front left corner
• Factory ride quality that has become harsh or inconsistent
• Suspension noise or instability associated with a worn strut assembly

Installation Notes and Fitment

Fits 2007-2013 BMW 328i, front left, sport suspension; B4 OE Replacement.

Fits 2011-2013 BMW 335i, front left, sport suspension; B4 OE Replacement.

Fits 2011-2013 BMW 335is, front left, B4 OE Replacement.

Verify the front left position and suspension configuration before installation. This assembly uses a stem upper mount and base cup lower mount, and it does not include a boot. Confirm all mounting points and OE cross-reference numbers before service.

Quality Assurance

Bilstein B4 OE Replacement parts are engineered to meet or exceed OE standards and are backed by Bilstein manufacturing quality.