Bilstein 19-323305 Suspension Shock Absorber - Rear

Bilstein B4 Rear Shock for BMW Sport Suspension

The Bilstein B4 OE Replacement rear shock absorber restores factory ride quality and handling for select BMW applications. This rear damper is built with a twintube internal design, black paint finish, and OE-style mounting points for a direct replacement on supported vehicles.

Key Features

• Bilstein B4 OE Replacement series for OE-style ride restoration
• Twintube internal design for consistent damping response
• Black paint finish
• Upper stem mount and lower eye mount
• No boot included
• Rear suspension shock absorber for BMW sport suspension applications without electronic suspension

Product Details

Bilstein B4 OE Replacement dampers are engineered to maintain original ride quality while meeting or exceeding OE standards. This rear shock absorber is a direct-fit solution for BMW 230i, 330i, 330i xDrive, 430i, 430i xDrive, M340i xDrive, and M440i xDrive models listed below. The Bilstein 19-323305 is a practical choice when replacing a worn rear damper and restoring controlled suspension movement on BMW sport suspension setups without electronic suspension.

This part cross-references OE numbers 33 52 6 879 302 and 33 52 6 879 315 for the same application. The Bilstein 19-323305 is part of the B4 OE Replacement line, which focuses on preserving factory ride characteristics rather than changing suspension behavior.

Compatible With

• Fits 2022-2025 BMW 230i, rear, Sport Suspension without Electronic Suspension; B4 OE Replacement
• Fits 2021-2025 BMW 430i, rear, Sport Suspension without Electronic Suspension; B4 OE Replacement
• Fits 2021-2025 BMW 430i xDrive, rear, Sport Suspension without Electronic Suspension; B4 OE Replacement
• Fits 2025 BMW M440i xDrive, rear, Sport Suspension without Electronic Suspension; B4 OE Replacement
• Fits 2019-2024 BMW 330i, rear, Sport Suspension without Electronic Suspension; B4 OE Replacement
• Fits 2019-2024 BMW 330i xDrive, rear, Sport Suspension without Electronic Suspension; B4 OE Replacement
• Fits 2020-2024 BMW M340i xDrive, rear, Without Electronic Suspension; B4 OE Replacement
• Fits 2021-2024 BMW M440i xDrive, rear, Without Electronic Suspension; B4 OE Replacement

Common Replacement Uses

• Rear suspension noise or reduced damping control
• Excessive bouncing after bumps or dips
• Uneven or unsettled rear ride quality
• Loss of factory-like handling response
• Replacement for worn OE rear shock absorber on supported BMW models

Installation Notes

Verify rear suspension configuration before ordering, including sport suspension and electronic suspension status. This shock uses an upper stem mount and lower eye mount, so confirm the mounting style matches the vehicle before installation. A professional alignment check is recommended after suspension service.

Quality Assurance

Bilstein B4 OE Replacement dampers are built to OE standards for factory-style ride restoration and consistent performance. The 19-323305 is backed by Bilstein engineering and quality control for BMW rear suspension service.