KYB 343149 Shock Absorber - Rear

KYB Excel-G Rear Shock Absorber

KYB Excel-G part number 343149 is a rear suspension shock absorber built to restore original ride control, stability, and handling. It is a nitrogen gas-charged, twin-tube design made on KYB OE assembly lines with OE-quality components for classic and domestic vehicle applications.

The Excel-G line is KYB’s Original Equipment for the Aftermarket offering, focused on returning the vehicle to its designed damping performance rather than changing the ride character. This makes 343149 a practical choice for drivers and technicians servicing older Toyota, Lincoln, Mazda, Nissan, Ford, Mercury, and Chevrolet applications.

Key Features

• KYB recommended OEM replacement shock for classic, domestic cars
• Restores designed control, handling, lane-change response, and braking stability
• Triple-lip fluid seal helps reduce oil and gas leakage
• Vehicle-specific, hand-assembled damping valves manage tire contact and body motion
• Supports proper operation of electronic safety systems by maintaining suspension behavior as engineered
• Strong, thick strut body and bracket construction helps minimize flex and maintain alignment
• Dust cover included

Product Line Details

KYB Excel-G shocks and struts are calibrated to match original damping characteristics. For owners and repair shops looking for a direct OE-style replacement, the Excel-G line is built to preserve factory ride quality and steering response on vehicles such as the Toyota Sienna, Toyota Corolla, Toyota Celica, Lincoln Town Car, and other listed rear applications.

Detailed Description

KYB 343149 is engineered for rear suspension service where restoring factory control matters more than changing ride feel. Its twin-tube, gas-charged construction and OE-calibrated valving help keep the tire planted, reduce excess body movement, and maintain predictable handling over bumps and during lane changes. This part cross-references Monroe Shocks & Struts (e.g., 37243) for the same application.

Compatible With rear applications including 1998-2003 Toyota Sienna, 1980-1987 Toyota Corolla, 1971-1977 Toyota Celica, 1982-1989 Lincoln Town Car, and 1955-1957 Chevrolet Bel Air. The KYB 343149 also serves additional rear fitments across Ford LTD, Mercury Marquis, Mercury Grand Marquis, Mazda 626, Nissan 510, and Toyota Corona models listed in the fitment data.

What It Helps Address

• Excessive bouncing after bumps
• Loose or unstable rear-end handling
• Reduced braking confidence from worn damping
• Uneven tire contact caused by weak shock control
• Delayed steering response during directional changes

Installation Notes and Tips

• Fits rear positions only for the listed applications.
• Follow manufacturer instructions when replacing suspension strut and coil spring assemblies where noted.
• Verify compressed length 12.91, extended length 21.57, and stroke length 8.66 before installation.
• Confirm upper mount type S1 and lower mount type E1 match the vehicle application.
• Inspect related suspension components, including springs, mounts, and bushings, during service.

Quality Assurance

KYB is a major OE shock and strut supplier, and Excel-G is produced on the same KYB assembly lines using OE-quality components. The design is intended to restore original performance characteristics for the listed rear applications, including Toyota Sienna, Toyota Corolla, and Lincoln Town Car fitments.