KYB 339270 Suspension Strut - Front Left

Overview of KYB Excel-G Suspension Strut 339270

The KYB Excel-G Suspension Strut 339270 is engineered for BMW models including the 128i, 135i, 325i, 328i, 330i, 335d, 335i, and 335is. Designed to restore original handling and control, this strut offers precise fitment and reliable performance for your vehicle's suspension system.

• Compressed Length: 11.61 inches
• Extended Length: 16.33 inches
• Stroke Length: 4.72 inches
• Upper Mount Type: 12x1.25
• Internal Rebound Spring: Yes
• Right Stop (R-stop): Yes
• Dust Cover: Not included

Features of the KYB Excel-G Strut

The Excel-G line by KYB is designed to provide a balance between comfort and control by restoring the original equipment (OE) ride quality. This suspension strut features an internal rebound spring that helps maintain consistent damping performance and reduces the risk of strut damage under normal driving conditions. The 12x1.25 upper mount thread ensures secure installation on compatible BMW models. The absence of a dust cover means the strut is designed for environments where additional protection is not critical, while the inclusion of a right stop (R-stop) enhances the strut's travel control.

Technical Specifications and Compatibility

This suspension strut has a compressed length of 11.61 inches and an extended length of 16.33 inches, providing a stroke length of 4.72 inches. These dimensions are critical for ensuring proper suspension travel and vehicle handling. The KYB Excel-G 339270 is specifically compatible with BMW 128i, 135i, 325i, 328i, 330i, 335d, 335i, and 335is models, making it a precise replacement part for these vehicles.

Common Suspension Issues Addressed

• Reduced ride comfort due to worn or damaged struts
• Decreased vehicle stability and handling performance
• Uneven tire wear caused by suspension misalignment
• Excessive bouncing or body roll during cornering
• Noise or vibration from faulty suspension components

Installation Notes and Tips

When installing the KYB Excel-G Suspension Strut 339270, ensure the upper mount thread size (12x1.25) matches the vehicle's mounting hardware. It is recommended to replace struts in pairs to maintain balanced suspension performance. Since this strut does not include a dust cover, inspect the surrounding components for wear and consider replacing dust boots if necessary. Proper torque specifications should be followed to secure the strut and prevent premature wear.

Quality Assurance and Warranty

KYB's Excel-G suspension struts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. The internal rebound spring design contributes to consistent damping and extended service life. While specific warranty details for part number 339270 should be confirmed with the supplier, KYB typically offers a limited warranty covering defects in materials and workmanship.