KYB KG4539 Shock Absorber - Rear

Overview of KYB Gas-a-just Suspension Shock Absorber KG4539

The KYB Gas-a-just shock absorber KG4539 is engineered for precise suspension performance on select BMW models. Designed to restore original handling and ride quality, this shock absorber is compatible with BMW 318i, 318is, 325e, 325i, 325is, 325iX, and M3 vehicles.

• Compressed length: 13.7 inches
• Extended length: 21.46 inches
• Stroke length: 7.76 inches
• Lower mount type: E2 (12x40)
• Upper mount type: S1
• Includes dust cover for protection
• Equipped with B-stop and R-stop for controlled travel

Detailed Product Description

The KYB Gas-a-just KG4539 shock absorber is designed to meet the suspension needs of various BMW models, including the 318i, 318is, 325e, 325i, 325is, 325iX, and M3. This shock absorber features a compressed length of 13.7 inches and an extended length of 21.46 inches, providing a stroke length of 7.76 inches to accommodate suspension travel effectively. The lower mount uses an E2 (12x40) configuration, while the upper mount is an S1 type, ensuring proper fitment and secure installation. A dust cover is included to protect the internal components from dirt and debris, extending the service life of the shock absorber. Additionally, the inclusion of both B-stop and R-stop components helps control the shock's compression and rebound limits, contributing to consistent ride quality and vehicle stability.

The Gas-a-just product line by KYB is known for its gas-charged design, which helps maintain consistent damping performance under various driving conditions. This technology reduces shock fade and improves handling response, making it suitable for drivers seeking reliable suspension components for their BMW vehicles.

Common Applications and Problem Solving

• Restores factory suspension performance on BMW 318i, 318is, 325e, 325i, 325is, 325iX, and M3 models
• Addresses excessive bouncing or poor ride comfort
• Reduces body roll and improves vehicle stability
• Eliminates noise or harshness caused by worn shocks
• Prevents premature tire wear due to suspension issues

Installation Notes and Tips

• Verify compatibility with your specific BMW model and year before installation
• Inspect mounting points and hardware for wear or damage prior to installation
• Use proper tools to avoid damage to the E2 (12x40) lower mount and S1 upper mount
• Ensure dust cover is properly seated to protect the shock absorber shaft
• Follow vehicle manufacturer torque specifications for mounting bolts

Quality Assurance and Warranty

KYB manufactures the Gas-a-just KG4539 shock absorber to meet strict quality standards, ensuring durability and consistent performance. This part is designed to provide reliable suspension function for BMW vehicles listed in the fitment. Warranty coverage details should be confirmed with the point of purchase or KYB directly, as terms may vary.