KYB 343140 Shock Absorber - Rear

KYB Excel-G Rear Shock Absorber 343140

KYB Excel-G 343140 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 a direct replacement approach on select Toyota, Mazda, and Nissan applications.

The Excel-G line focuses on returning the vehicle to its designed damping characteristics rather than changing the ride feel. For drivers servicing a Toyota Corolla, Mazda RX-7, or Nissan 200SX, this rear shock is engineered to support consistent steering response, body control, and braking stability.

Key Features

• KYB Excel-G part number 343140 for rear suspension applications
• Nitrogen gas-charged, twin-tube shock absorber design
• OE-style calibration to restore factory ride control and handling
• Triple-lip fluid seal to help reduce oil and gas leakage
• Vehicle-specific, hand-assembled damping valves for controlled tire contact and body motion
• Strong strut body and bracket construction to reduce flex and maintain alignment
• Dust cover included
• B-stop included

Product Details

KYB Excel-G is the brand’s OE replacement line for drivers who want factory-style suspension performance. Part number 343140 uses the same type of engineering approach found in KYB original equipment products, with damping tuned to help the suspension work as the manufacturer intended. This makes it a practical choice for rear shock replacement on 1968-1989 Toyota Corolla, 1979-1985 Mazda RX-7, 1977-1983 Nissan 200SX, 1979-1982 Nissan 210, 1978-1981 Nissan 510, and 1987-1989 Toyota Van applications listed below.

This part cross-references Monroe Shocks & Struts 5881 for the same application.

What It Helps Address

• Excessive rear bounce after bumps
• Loose or unsettled handling in corners
• Reduced braking stability from worn damping
• Uneven tire contact caused by weak rear shock control
• Suspension noise or fluid leakage from aging shock components

Installation Notes

• Fits 1987-1989 Toyota Van, rear; replace suspension strut and coil spring assembly according to manufacturer instructions.
• Fits 1979-1985 Mazda RX-7, rear; recommended OEM replacement; excludes electronically-adjustable suspension.
• Fits 1977-1983 Nissan 200SX, rear; replace suspension strut and coil spring assembly according to manufacturer instructions.
• Fits 1979-1982 Nissan 210, rear; replace suspension strut and coil spring assembly according to manufacturer instructions.
• Fits 1978-1981 Nissan 510, rear; replace suspension strut and coil spring assembly according to manufacturer instructions.
• Fits 1971-1974 Toyota Corolla, rear; recommended OEM replacement; excludes SR-5.
• Fits 1970 Toyota Corolla, rear; recommended OEM replacement; excludes SR-5; from 5/70.
• Fits 1970 Toyota Corolla, rear; recommended OEM replacement; excludes SR-5; to 4/70.
• Fits 1968-1969 Toyota Corolla, rear; replace suspension strut and coil spring assembly according to manufacturer instructions.

Verify compressed length 13.39 in., extended length 20.75 in., stroke length 7.36 in., lower mount type E2(12X32), and upper mount type S1 before installation. Rear shock replacement on Toyota Corolla, Mazda RX-7, and Nissan 510 platforms should follow the vehicle service manual and suspension alignment procedures.

Quality Assurance

KYB is a major OE shock and strut supplier, and the Excel-G line is built on the same KYB OE assembly lines using OE-quality components. The 343140 is calibrated to restore original suspension performance for the listed rear applications.