Dorman 540-145 Suspension Knuckle Bushing - Rear

Dorman 540-145 Suspension Knuckle Bushing

Dorman 540-145 is a suspension knuckle bushing built as a standard replacement for the original equipment part on select Hyundai and Kia rear suspension applications. It is precision-engineered and tested for reliable OE-style fit and function on vehicles such as the Hyundai Sonata, Hyundai XG350, Kia Optima, and Kia Magentis.

Key Features

• Standard replacement suspension knuckle bushing for rear suspension service
• Steel, rubber construction for the intended bushing application
• Black and gray finish
• Inside diameter: 12.3 mm
• Outside diameter: 35.3 mm
• Length: 44.5 mm
• Mounting hardware not included
• Compatible with select Hyundai and Kia rear knuckle applications

Detailed Description

This Dorman suspension knuckle bushing, part number 540-145, is made for direct replacement use on specific rear suspension knuckle locations. It is engineered to match the original equipment design on supported vehicles, helping restore the bushing interface between suspension components and the knuckle assembly. This part cross-references MOOG Chassis Products K200033 for the same application.

Compatible With 1999-2005 Hyundai Sonata, rear; 2001-2006 Hyundai XG300, rear; 2002-2005 Hyundai XG350, rear; 2001-2006 Hyundai Magentis, rear; 2001-2006 Kia Optima, rear; and 2004-2006 Kia Amanti, rear. For Hyundai Sonata and Kia Optima rear suspension repair, Dorman 540-145 provides a direct-fit replacement option for OE-style service.

What This Part Helps Address

• Rear suspension looseness caused by worn knuckle bushings
• Clunking or knocking noises from the rear suspension area
• Excessive movement at the knuckle-to-suspension connection
• Uneven handling feel related to degraded bushing material
• Service replacement for cracked, hardened, or deteriorated bushings

Installation Notes and Tips

Verify rear suspension fitment by year, make, and model before ordering. This bushing is used in rear applications only, and the fitment notes indicate three are needed per knuckle on the listed vehicles. Inspect the surrounding suspension components, knuckle condition, and related fasteners during service, since worn adjacent parts can affect final repair results. Mounting hardware is not included.

Quality Assurance

Dorman designs this suspension knuckle bushing as a precision-engineered replacement and subjects it to testing for reliable service on the specified applications. The part is built to standard replacement specifications for supported Hyundai and Kia rear suspension repairs.