Moog RK621316 Suspension Control Arm and Ball Joint Assembly - Front Left Lower

Front Left Lower Control Arm for Trailblazer, Envoy, 9-7x

Restore front suspension geometry with this Moog suspension control arm and ball joint assembly. Built for the front left lower position, it is a direct-fit replacement for select Chevrolet Trailblazer, GMC Envoy, Saab 9-7x, and Isuzu Ascender applications.

Key Features

• Moog RK621316 suspension control arm and ball joint assembly
• Stamped steel control arm construction with black finish
• Pre-greased for immediate service
• Rubber bushings included for mounting support
• Press-in ball joint with threaded stud type
• Mounting hardware included
• No grease fitting included
• Non-adjustable design for OE-style replacement

Detailed Description

The Moog RK621316 is engineered as a front left lower suspension control arm and ball joint assembly for select 2008-2009 Chevrolet Trailblazer, 2008-2009 GMC Envoy, 2008-2009 Saab 9-7x, and 2008 Isuzu Ascender models. Its stamped steel construction supports structural strength, while the corrosion-resistant finish helps protect the part in demanding undercar conditions. Pre-greased components and included rubber bushings support straightforward replacement of worn suspension hardware. This part cross-references Dorman OE Solutions 521-971 for the same application.

Common Problems This Part Can Address

• Clunking or knocking from the front suspension
• Excessive play in the lower control arm or ball joint
• Uneven tire wear caused by worn suspension geometry
• Steering wander or reduced front-end stability
• Noise or vibration from deteriorated bushings

Installation Notes and Tips

Fits 2008-2009 Chevrolet Trailblazer, front left lower; 2008-2009 GMC Envoy, front left lower; 2008-2009 Saab 9-7x, front left lower; and 2008 Isuzu Ascender, front left lower. Verify the vehicle’s suspension configuration and compare the original part before installation. Because this assembly uses a press-in ball joint and threaded stud type, proper suspension service tools and a professional alignment after installation are recommended. The part number RK621316 should be matched to the vehicle application before ordering.

Quality Assurance

Moog premium control arms are built for foreign and domestic nameplates with attention to structural strength and corrosion protection. RK621316 is manufactured to meet OEM standards for the listed applications, and the part number RK621316 is intended for direct replacement use on the specified front left lower positions.