Lesjofors 4008522 Coil Spring - Front

Front Coil Spring for BMW X3 and X4

The Lesjofors 4008522 front coil spring is a direct replacement for select BMW X3 and BMW X4 models with sports suspension. It is built to OE-quality standards and uses high-strength steel with protective finishing for long-term service in suspension applications.

• Front coil spring for select BMW X3 and BMW X4 applications
• Seat included: No
• Manufactured from high-strength steel
• Heat treated, shot peened, and pre-set for consistent performance
• Zinc phosphate coated and epoxy powder coat painted for corrosion resistance
• Lesjofors part number 4008522

Detailed Product Overview

Lesjofors 4008522 is a replacement coil spring engineered for the front suspension on BMW X3 and BMW X4 vehicles equipped with sports suspension. It is manufactured to meet or exceed OE quality expectations and is tested during production to support proper ride height and suspension response. This front coil spring is a practical choice when replacing a worn or sagging spring on a BMW X3 front suspension or a BMW X4 front suspension.

This part cross-references BMW OE numbers 31336787137 and 31336787144 for the same application. The Lesjofors 4008522 is a fitment-specific replacement for 2011 BMW X3 front, 2012-2017 BMW X3 front with sports suspension, and 2015-2018 BMW X4 front including sports suspension.

Common Issues This Part Can Address

• Front-end sagging from a fatigued coil spring
• Uneven ride height on the BMW X3 or BMW X4
• Noisy or unstable suspension behavior caused by a weakened spring
• Loss of proper suspension support after long-term wear
• Restoration of factory-style front suspension geometry

Installation Notes and Tips

Install Lesjofors 4008522 on the front suspension only and verify sports suspension fitment before ordering. Because coil springs are under high tension, use proper spring-compression equipment and follow BMW service procedures during removal and installation. Inspect related suspension components such as strut mounts, seats, and isolators before reassembly.

Quality Assurance

Lesjofors has a long spring-manufacturing history dating back to 1852 and supplies replacement springs built to OE-quality standards. Each spring is produced with heat treatment, shot peening, protective coating, presetting, and testing to support consistent fit and performance in BMW X3 and BMW X4 front suspension service.