Moog K5143 Steering Idler Arm

MOOG K5143 Steering Idler Arm

Restore precise steering response with the MOOG K5143 steering idler arm. Built for classic GM applications, this replacement part is engineered with enhanced lubrication features and a pre-greased design to support smoother operation and easier service.

• Pre-greased for initial installation convenience
• Grease fitting included for routine maintenance
• Length: 125.0 mm / 4.921 in.
• Mounting hole diameter: 61.0 mm / 2.402 in.
• MOOG chassis replacement part number K5143

Fitment Coverage

• Fits 1972 Buick Skylark, straight arm; includes powdered-metal Gusher bearing to allow grease to penetrate bearing surfaces.
• Fits 1968-1972 Chevrolet El Camino, enhanced lubrication improves steering performance for suspension stabilizer bar link.
• Fits 1970-1972 Chevrolet Monte Carlo, enhanced lubrication improves steering performance for suspension stabilizer bar link.
• Fits 1966-1972 Oldsmobile Cutlass, enhanced lubrication improves steering performance for suspension stabilizer bar link.
• Fits 1967-1972 Oldsmobile Cutlass Supreme, enhanced lubrication improves steering performance for suspension stabilizer bar link.
• Fits 1972 Pontiac Grand Prix, straight arm; thru 10/9/72; includes powdered-metal Gusher bearing to allow grease to penetrate bearing surfaces.
• Fits 1972 Pontiac GTO, enhanced lubrication improves steering performance for suspension stabilizer bar link.
• Fits 1964-1970 Pontiac GTO, enhanced lubrication improves steering performance for suspension stabilizer bar link.
• Fits 1964-1972 Pontiac LeMans, enhanced lubrication improves steering performance for suspension stabilizer bar link.
• Fits 1968-1971 Buick Skylark, straight arm; includes powdered-metal Gusher bearing to allow grease to penetrate bearing surfaces.
• Fits 1969-1971 Pontiac Grand Prix, enhanced lubrication improves steering performance for suspension stabilizer bar link.
• Fits 1964-1970 Pontiac Tempest, enhanced lubrication improves steering performance for suspension stabilizer bar link.
• Fits 1964-1965 Oldsmobile Cutlass, 13/16 inch diameter center link with powdered-metal Gusher bearing for grease penetration.
• Fits 1964 Buick Skylark, 13/16 inch diameter center link with powdered-metal Gusher bearing for grease penetration.
• Fits 1964 Chevrolet El Camino, 13/16 inch diameter center link with powdered-metal Gusher bearing for grease penetration.
• Fits 1964 Chevrolet Malibu, 13/16 inch diameter center link with powdered-metal Gusher bearing for grease penetration.

What This Part Helps Address

• Steering looseness caused by wear in the idler arm assembly
• Uneven steering feel during lane changes or turns
• Excess play in classic GM steering linkage
• Maintenance issues related to dry or poorly lubricated pivot points
• Replacement needs on Buick Skylark, Chevrolet El Camino, Pontiac GTO, and related models

Installation Notes

Verify center link style, arm orientation, and model-year application before installation. The included grease fitting supports periodic lubrication after service, and the pre-greased design helps simplify initial setup. For best results, inspect adjacent steering linkage components for wear while replacing the idler arm.

Quality Assurance

MOOG is known for continual chassis design updates that focus on longer service life and easier replacement. The K5143 reflects that approach with lubrication-focused construction and service-friendly features for classic steering systems.

This part cross-references Dorman OE Solutions 535-660 and Mevotech Supreme MK5143 for the same application.