Front Left Lower Control Arm with Ball Joint for 2009-2016 BMW Z4 & More - Dorman 520-559

Replace a worn front lower arm in one step with this Dorman control arm, part number 520-559, which arrives with its ball joint and bushings already installed. It fits many vehicles, among them the 2009-2016 BMW Z4, 2012-2015 BMW X1 and 2008-2013 BMW 125i. See the Buyer's Guide tab for the full list.

This Dorman suspension control arm and ball joint assembly is cataloged for the front left lower forward position. It is designed as a direct replacement for the original equipment on the listed applications. Dorman puts it through an industry-leading evaluation process intended to deliver a smooth ride, directional stability and predictable dynamics.

• Trustworthy replacement: Directly replaces the original assembly on specific vehicle applications.
• Pre-assembled: The ball joint and bushings come pre-installed, which saves time and labor.
• Quality engineering: Went through industry-leading testing aimed at a smooth, stable and safe ride.
• Durably designed: Additional coatings provide rust and corrosion resistance.

A lower control arm connects the steering knuckle to the vehicle's chassis. It lets the wheel travel up and down while the ball joint acts as the pivot for steering. These are signs the arm may need replacing: clunking over bumps, loose or wandering steering, uneven tire wear, and a worn ball joint or bushings. This Dorman lower control arm is sold individually for the left side, and replacing both sides together is recommended. A wheel alignment is typically advised after installation.

Interchange: 102-7066 · 623.34029
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