Dorman 686-421 Suspension Knuckle Kit - Rear Left

Dorman 686-421 Loaded Knuckle for Rear Left Service

Dorman 686-421 is a loaded suspension knuckle kit for rear left applications on select Dodge Durango and Jeep Grand Cherokee models. It brings together the critical components needed for a faster, safer wheel-end repair without the added step of pressing parts separately.

Built as a standard replacement in steel with a black finish, this loaded knuckle includes the hub, ball joint, and bearing already assembled for service efficiency. It is a practical solution for rear left wheel-end repairs on 2016-2024 Dodge Durango, 2016-2021 Jeep Grand Cherokee, and 2022 Jeep Grand Cherokee WK applications.

Key Features

• Loaded suspension knuckle kit for rear left position
• OE FIX design reduces the need for a hydraulic press during repair
• Hub included and preassembled with critical wheel-end components
• Ball joint included for a more complete repair assembly
• Bearing included, Gen 1 bearing generation
• Steel construction with black finish
• Standard replacement grade for direct service use
• Fits select Dodge Durango and Jeep Grand Cherokee rear left applications

Detailed Description

Dorman 686-421 is engineered for rear left suspension service where a worn wheel bearing or related wheel-end component would normally require multiple parts and specialized pressing equipment. By supplying the knuckle with the hub, ball joint, and bearing already assembled, this part simplifies the repair process and helps reduce labor time. It is a direct-fit style solution for 2016-2024 Dodge Durango, 2016-2021 Jeep Grand Cherokee, and 2022 Jeep Grand Cherokee WK models.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application. The Dorman 686-421 part number is useful when searching for a rear left loaded knuckle assembly for these vehicles.

What It Helps Repair

• Rear wheel bearing noise or roughness
• Excessive play at the wheel-end assembly
• Ball joint wear in the rear suspension knuckle area
• Hub-related service needs on the rear left side
• Time-consuming repairs that normally require component pressing

Installation Notes and Tips

Verify rear left fitment by year, make, and model before installation. Inspect surrounding suspension and axle components for wear during service, and confirm all mating surfaces are clean before assembly. Because this loaded knuckle includes critical components already assembled, it is suited to a more streamlined repair process than rebuilding the knuckle from separate parts.

Quality Assurance

Dorman manufactures OE FIX replacement parts to address common service challenges with a more complete assembly approach. Part number 686-421 is built as a standard replacement for the listed rear left applications and is intended to support a straightforward wheel-end repair on compatible Dodge Durango and Jeep Grand Cherokee vehicles.