KYB 236003 Suspension Strut - Rear

KYB Excel-G Rear Suspension Strut for GM Cars

The KYB Excel-G 236003 is a rear suspension strut built to restore original ride control, stability, and steering response on select GM cars. It is an OE-style replacement for applications such as the Buick Regal, Pontiac Grand Prix, Oldsmobile Cutlass Supreme, and Chevrolet Lumina.

Built on KYB OE assembly lines, the Excel-G line is calibrated to return the vehicle to its designed handling balance rather than change it. This rear strut uses a nitrogen gas-charged, twin-tube design with OE-quality components for consistent damping performance.

Key Features

• KYB recommended OEM replacement strut
• Restores designed control and handling for GM rear suspension applications
• Triple-lip fluid seal helps reduce oil and gas leakage
• Vehicle-specific, hand-assembled damping valves manage tire contact, steering response, and body movement
• Supports proper operation of electronic safety systems by maintaining suspension behavior as engineered
• Strong strut body and bracket design helps minimize flex and maintain alignment
• Rear position application with compressed length 13.98 in., extended length 21.77 in., and 7.8 in. stroke

Product Details

KYB Excel-G part number 236003 is an OEA-style replacement suspension strut for rear applications on 1988-1997 Oldsmobile Cutlass Supreme, 1988-1996 Buick Regal, 1988-1996 Pontiac Grand Prix, and 1990-1994 Chevrolet Lumina. It is engineered to match original damping characteristics for drivers who want factory-like ride quality and predictable body control. This part cross-references Monroe Shocks & Struts 71831 for the same application.

What It Helps Correct

• Excessive bouncing after bumps
• Loose or unstable rear-end handling
• Reduced braking stability caused by worn struts
• Poor lane-change response and body roll
• Uneven tire contact from weakened damping control

Installation Notes

Install in the rear position only. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. KYB recommends new strut mounts, part number SM5016, to reduce noise and vibration, and a KYB strut boot, part number SB106, to help protect the strut from dirt, debris, and salt.

Quality Assurance

Excel-G is manufactured on KYB OE assembly lines using OE-quality components and is calibrated to restore original performance. KYB’s OE supplier background and vehicle-specific damping design make this a technical replacement choice for Buick Regal, Pontiac Grand Prix, Oldsmobile Cutlass Supreme, and Chevrolet Lumina rear suspension service.