Rear Shock Absorber for 1999-2004 Nissan Pathfinder & More - KYB KG4163

$91.99
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Vehicles this part fits

    Part number: KG4163
    UPC: 781552010463
    Condition: New
    Weight: 4.40 LBS
    Item Package Quantity: 1
    $91.99
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    KYB Suspension Shock Absorber P/N:KG4163
    KYB Suspension Shock Absorber P/N:KG4163
    $91.99
    $91.99

    Steady your ride and control body motion with the KYB Gas-a-just Shock Absorber KG4163, a high-pressure monotube gas shock that drops in as a rear replacement for the 1999-2003 Infiniti QX4 and the 1999-2004 Nissan Pathfinder. This KYB shock absorber uses a monotube design with components and valving developed specifically for the 1999-2004 Nissan Pathfinder and the 1999-2003 Infiniti QX4.

    Inside are two separate working chambers: an air-free hydraulic piston and valve area for responsiveness and control, and a high-pressure nitrogen gas area with a floating piston for a comfortable ride during normal driving with added performance on demand. Separating the gas and oil helps deliver fade-free operation and instant response, and the added damping over the OE design is intended for vehicles that work, tow, or run larger, heavier tires and wheels.

    • Up to 25% more damping: adds damping performance over original-equipment shocks.
    • Triple chrome-plated piston rod: an ultra-smooth rod designed to reduce seal wear, since fluid leaking can be a cause of shock failure.
    • Higher gas pressure: responds quickly to help improve steering response.
    • Supports safety systems: helps keep electronic safety systems performing as designed.

    Sold individually; replacing both rear shocks together as a matched pair is recommended for balanced handling.

    Interchange: G63845 · 37204

    This part cross-references / interchanges with the following part numbers:

    G63845, 37204

    Frequently Asked Questions

    What vehicles does the KYB KG4163 shock absorber fit?

    It is a rear-position fit for the 1999-2003 Infiniti QX4 and the 1999-2004 Nissan Pathfinder. See the "Vehicles it fits" section to confirm your exact vehicle.

    What is a KYB gas shock absorber monotube design?

    It is a high-pressure monotube that keeps the gas and oil separated in distinct chambers, which helps prevent aeration fade and supports fast, consistent response.

    How is the Gas-a-just different from a twin-tube shock?

    It uses an air-free hydraulic piston and valve area plus a separate high-pressure nitrogen chamber with a floating piston, adding damping and response versus a traditional twin-tube.

    Do I need to replace both rear shocks?

    Shocks are sold individually, so this listing is for one. Replacing both rear shocks together as a matched pair is recommended for balanced handling.

    What are signs this shock may need replacing?

    Excessive bouncing, a floaty ride, nose-dive when braking, or fluid leakage from the shock body are common signs. Diagnose the cause before replacing.

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