KYB RH6421 Coil Spring

KYB RH6421 Coil Spring

The KYB RH6421 Coil Spring is a high‑performance suspension component designed for the rear axle of Nissan Micra models produced between 2003 and 2010. It is engineered to provide reliable load support, maintain ride comfort, and enhance handling stability under various driving conditions.

Key Design Features

• Material Composition: Made from premium alloy steel that offers excellent fatigue resistance and durability.
• Coil Geometry: Optimized helix diameter and pitch to balance stiffness with smoothness, ensuring consistent performance across a wide range of speeds.
• Load Capacity: Rated for the specific weight distribution of the Micra rear suspension, providing adequate support for both passenger and cargo loads.
• Installation Compatibility: Designed to fit seamlessly with existing OEM mounting points, eliminating the need for additional hardware or modifications.

Performance Benefits

The RH6421 coil spring delivers a number of tangible advantages:

• Improved Ride Quality: Its precise spring rate reduces body roll and dampens road irregularities, resulting in a smoother ride.
• Enhanced Handling: By maintaining optimal wheel alignment during cornering, the spring contributes to sharper steering response and better vehicle stability.
• Extended Component Life: The high‑grade steel construction resists corrosion and wear, extending the service life of both the spring itself and associated suspension parts.

Compatibility Overview

The RH6421 is specifically engineered for the following Nissan Micra variants:

• Micra III (K12) Hatchback – 2003 to 2010
• Engine options: 1.0L, 1.2L, 1.4L, and 1.5L (dCi)
• Transmission types: Manual and Automatic

Its dimensions match the OEM specifications for the rear coil spring assembly, ensuring a direct fit without alteration to the vehicle’s chassis or suspension geometry.

Installation Guidelines

1. Secure the vehicle on a flat surface and lift the rear axle using a jack stand.
2. Remove the existing coil spring by loosening the mounting bolts and carefully extracting the spring from its housing.
3. Position the new RH6421 coil spring onto the mounting points, aligning it with the OEM orientation.
4. Tighten all fasteners to the manufacturer’s torque specifications.
5. Lower the vehicle and perform a test drive to confirm proper operation and alignment.

Maintenance Tips

• Inspect the spring for signs of fatigue, such as visible cracks or deformation, during routine maintenance checks.
• Keep the mounting area clean from debris and corrosion to ensure smooth operation.
• Replace the spring if any abnormal noises or handling issues arise, indicating potential wear.

Technical Specifications

Why Choose the KYB RH6421?

The KYB RH6421 Coil Spring is a trusted choice for Nissan Micra owners seeking to preserve or restore their vehicle’s original suspension performance. Its precise engineering, robust construction, and straightforward installation make it an ideal replacement for worn or damaged springs.

Conclusion

By integrating the KYB RH6421 Coil Spring into your Nissan Micra’s rear suspension system, you ensure that the vehicle retains its intended ride comfort, handling dynamics, and long‑term reliability. This component exemplifies KYB’s commitment to quality and performance in automotive suspension solutions.