URO 31121139987 Suspension Control Arm - Front Left Lower

Overview of URO Front Left Lower Suspension Control Arm

The URO Suspension Control Arm, part number 31121139987, is designed specifically for front left lower suspension applications on select BMW models. Engineered to meet OEM specifications, this control arm ensures reliable performance and precise handling for vehicles such as the BMW 525i, 530i, and M5.

• Pre-greased for immediate installation
• Includes durable bushings for enhanced suspension stability
• Equipped with a threaded ball joint stud and bolt-in mounting type
• Ball joint features metal bearing and high strength steel housing
• Comes with a neoprene black dust boot for protection against contaminants
• Locking nut included for secure assembly
• Compatible with multiple BMW models including 524td, 535is, 740iL, and 750iL

Detailed Product Description

This URO suspension control arm (31121139987) is crafted to provide dependable front left lower suspension support for a range of BMW vehicles. The control arm is pre-greased, eliminating the need for additional lubrication during installation. It includes high-quality bushings that help absorb road shocks and maintain proper wheel alignment. The ball joint is integrated with a threaded stud (M14x1.50) and a bolt-in mounting type, allowing for a secure and precise fit. Constructed with a metal bearing and a high strength steel housing, the ball joint offers durability and resistance to wear. The included black neoprene dust boot protects the ball joint from dirt and moisture, extending the component's service life. A locking nut is also provided to ensure the ball joint remains securely fastened during operation.

Compatible BMW Models and Applications

This suspension control arm is compatible with the following BMW models: 524td, 525i, 528e, 530i, 533i, 535i, 535is, 540i, 735i, 735iL, 740i, 740iL, 750iL, and M5. It is designed specifically for the front left lower position, making it a direct replacement part for these vehicles.

Common Issues Addressed by This Control Arm

• Worn or damaged suspension bushings causing poor handling
• Loose or failing ball joints leading to uneven tire wear
• Excessive suspension noise or clunking from front left lower area
• Misalignment issues affecting steering response
• Corrosion or damage to original control arm components

Installation Notes and Tips

Installation of the URO control arm 31121139987 requires standard suspension tools. Since the control arm comes pre-greased and includes bushings and ball joint, additional lubrication is not necessary. Ensure the ball joint is properly torqued using a 22mm wrench on the ball stud nut. Verify alignment after installation to maintain optimal vehicle handling. This control arm is not adjustable and does not include grease fittings, so routine maintenance should focus on inspection rather than re-greasing.

Quality Assurance and Warranty

URO suspension components are manufactured to meet or exceed OEM standards, using high strength steel and durable materials for long-lasting performance. The ball joint's metal bearing and neoprene dust boot contribute to extended service life under normal driving conditions. While specific warranty details are not provided, URO parts typically come with a limited warranty against defects in materials and workmanship.