KYB 721001 / 721002 front electric shock absorber pair for Toyota Mark X GRX130 / GRX133 (2009–2012). OE-grade RH/LH electronic suspension dampers sold as a pair for restored adaptive ride comfort, stability, and handling performance.

Product Overview

This is a complete front shock absorber pair (RH + LH) consisting of KYB part numbers 721001 and 721002, designed for the Toyota Mark X GRX130 / GRX133 (2009–2012) equipped with factory electronic suspension systems.

Engineered by KYB, these OE-quality dampers restore the vehicle’s original adaptive suspension performance, ensuring correct electronic damping response, stability control, and ride comfort across all driving conditions.

Sold as a matched pair, this set ensures balanced suspension performance on both sides of the front axle—critical for maintaining steering precision and electronic suspension harmony.

Vehicle Application

• Make: Toyota

• Model: Mark X

• Chassis: GRX130 / GRX133

• Year: 2009–2012

• Suspension Type: Electric / AVS electronic damping system

• Position: Front Left (LH) + Front Right (RH)

• Sale Unit: Pair (Complete Front Set)

KYB Part Numbers Included

• KYB 721001 – Front Right (RH)

• KYB 721002 – Front Left (LH)

-Sold as a matched RH/LH pair for full front axle replacement

Key Features

• Complete front shock absorber pair (RH + LH)

• OE-spec electronic suspension compatibility

• Restores factory AVS adaptive damping behavior

• Gas-pressure twin-tube technology for stable control

• Improved braking stability and cornering precision

• Reduced vibration, bounce, and road harshness

• Balanced performance across both front wheels

• Long-life KYB sealing and internal valve system

Technical Specifications

• Brand: KYB

• Type: Electric / Electronic Suspension Compatible Struts

• Design: Gas Pressure Twin-Tube

• Fitment: Front Axle (Pair Set)

• Installation: Direct OE replacement

• Condition: New aftermarket OE-quality

OEM Cross Reference (Reference Only)

OEM numbers vary depending on:

• GRX130 vs GRX133 configuration

• AVS / electronic suspension package

• Market specification (JDM variants common)

Always confirm using:

• VIN / chassis number

• TecDoc catalog matching

• Suspension system type verification

Fitment Warning (Important)

This KYB 721001 / 721002 pair fits ONLY:

• Toyota Mark X GRX130 / GRX133

• Model years 2009–2012

• Vehicles equipped with ELECTRIC / AVS electronic suspension

⚠️ Non-electronic suspension models are NOT compatible and use different shock absorber types.

Why This Pair Matters

Replacing only one side in an electronic suspension system creates imbalance in damping response. This can lead to:

• Uneven ride quality

• Steering instability

• Increased wear on suspension components

• Reduced effectiveness of adaptive damping system

Installing a matched KYB pair restores factory symmetry and electronic calibration integrity.

The KYB 721001 / 721002 front electric shock absorber pair is a precision OE replacement solution for the Toyota Mark X GRX130 / GRX133 (2009–2012), restoring full electronic suspension functionality, ride comfort, and driving stability as originally engineered.