Delphi TC1727 Suspension Control Arm and Ball Joint Assembly - Front Left Lower

Delphi Suspension Control Arm and Ball Joint Assembly Overview

The Delphi TC1727 suspension control arm and ball joint assembly is engineered for front left lower suspension applications on select BMW models. Designed with durable aluminum construction and pre-greased components, this assembly ensures reliable performance and fitment for BMW 320i, 323i, 325Ci, 325i, 328Ci, 328i, 330Ci, 330i, and Z4 vehicles.

• Pre-greased for immediate installation
• Includes rubber, steel, and aluminum bushings
• Threaded ball joint stud for secure mounting
• Durable aluminum control arm with casting/forged construction
• Mounting hardware included for complete replacement
• Compatible with front left lower suspension on specified BMW models

Technical Details and Construction

The Delphi TC1727 control arm assembly features a gray aluminum control arm constructed through a casting and forging process, providing a balance of strength and lightweight design. The assembly includes pre-installed rubber, steel, and aluminum bushings to reduce vibration and improve suspension response. The ball joint stud is threaded, with multiple thread diameter and stud length options to ensure precise fitment. This assembly is designed without grease fittings and is not greaseable, relying on the pre-greased components for maintenance-free operation. The control arm measures approximately 396 mm (15.591 inches) in length and 169 mm (6.654 inches) in maximum width, tailored for the front left lower position on compatible BMW vehicles.

Compatible BMW Models and Applications

This suspension control arm and ball joint assembly is compatible with a range of BMW models, including the 320i, 323i, 325Ci, 325i, 328Ci, 328i, 330Ci, 330i, and Z4. It is specifically designed for the front left lower suspension position, making it a direct replacement part for these vehicles. The Delphi TC1727 part number ensures proper fitment and function within the suspension system of these BMW models.

Common Suspension Issues Addressed

• Worn or damaged control arm bushings causing suspension noise or vibration
• Loose or failing ball joints affecting steering stability
• Corroded or bent control arms compromising alignment and handling
• Suspension component wear leading to uneven tire wear
• Reduced suspension performance impacting ride comfort and safety

Installation Notes and Tips

Installation of the Delphi TC1727 control arm assembly requires standard suspension tools and mechanical knowledge. Since the assembly comes pre-greased and includes mounting hardware, it simplifies the replacement process. It is important to verify the front left lower position and confirm compatibility with your specific BMW model before installation. After installation, a professional wheel alignment is recommended to ensure proper suspension geometry and vehicle handling.

Quality Assurance and Warranty

Delphi suspension components are manufactured to meet or exceed OEM standards for durability and performance. The TC1727 assembly is a standard replacement grade part, backed by Delphi's quality control processes. While specific warranty details may vary, Delphi typically offers coverage against defects in materials and workmanship to provide confidence in the product's reliability.