Delphi TC977 Suspension Control Arm and Ball Joint Assembly - Rear Upper Forward

Delphi Rear Upper Forward Suspension Control Arm for BMW

The Delphi TC977 Suspension Control Arm and Ball Joint Assembly is designed for precise fitment on select BMW models including the 525i, 528i, 530i, 540i, 740i, 740iL, and 750iL. This rear upper forward control arm assembly comes pre-greased and includes all necessary bushings and grease fittings to ensure smooth operation and long service life.

• Pre-greased for immediate installation and reduced maintenance
• Includes grease fitting and neoprene rubber bushings
• Press-in ball joint mounting type for secure fit
• Durable casting and forged construction using 6082 aluminum alloy
• Standard replacement grade for reliable performance
• Compatible with rear upper forward position on specified BMW models
• Control arm finished in white for corrosion resistance

Product Details and Construction

The Delphi TC977 control arm assembly features a robust construction combining casting and forging techniques with 6082 aluminum alloy material, providing a balance of strength and lightweight performance. The included neoprene rubber bushings help absorb vibrations and reduce noise, while the press-in ball joint mounting ensures a secure and precise fit. This assembly is pre-greased and includes a grease fitting, facilitating easier maintenance and extending the lifespan of the suspension components. Note that mounting hardware is not included with this part.

Compatible BMW Models and Applications

This suspension control arm and ball joint assembly is specifically designed for the rear upper forward position on BMW 5 Series and 7 Series models, including the 525i, 528i, 530i, 540i, 740i, 740iL, and 750iL. The part number TC977 ensures exact fitment and compatibility, making it a suitable replacement for worn or damaged control arms in these vehicles.

Common Issues Addressed by This Control Arm Assembly

• Excessive suspension noise or clunking from worn bushings or ball joints
• Uneven tire wear due to misaligned suspension geometry
• Reduced handling stability and steering response
• Vibration or harshness transmitted through the rear suspension
• Corrosion or damage to the original control arm compromising safety

Installation Notes and Tips

Installation of the Delphi TC977 control arm assembly should be performed by a qualified technician familiar with BMW suspension systems. The part comes pre-greased and includes bushings and grease fittings, but mounting hardware must be reused or sourced separately. Proper torque specifications should be followed to ensure secure attachment. After installation, a professional wheel alignment is recommended to restore correct suspension geometry and optimize vehicle handling.

Quality Assurance and Warranty

Delphi suspension components meet standard replacement grade requirements, providing reliable performance and durability. The TC977 control arm assembly undergoes rigorous quality checks to ensure fitment and function. While specific warranty details may vary, Delphi typically offers coverage against manufacturing defects to support customer confidence in their products.