Lesjofors 4008525 Coil Spring - Front

Front Coil Spring for BMW 335i and 340i

Restore proper front suspension support with this Lesjofors coil spring, part number 4008525. It is a front coil spring for select BMW 335i, BMW 335i xDrive, and BMW 340i applications, with fitment covering 2012-2018 models listed below.

• Seat included: No
• Front position replacement spring
• Manufactured from high-strength steel
• Heat treated, shot peened, and zinc phosphate coated
• Epoxy powder coat painted for added surface protection
• Pre-set and tested for consistent spring performance
• Cross-reference: BMW OE part number 31336851718

Product Details

Lesjofors 4008525 is a replacement coil spring engineered to meet or exceed OE quality standards. Lesjofors uses controlled manufacturing steps, including heat treatment, shot peening, zinc phosphate coating, and epoxy powder coating, to help deliver consistent ride height and suspension response. This front spring is a direct service part for BMW 335i, BMW 335i xDrive, and BMW 340i models in the fitment range shown.

Compatible With: 2016-2018 BMW 340i, front; 2012-2015 BMW 335i, front, exc. sports suspension; 2013-2015 BMW 335i xDrive, front, exc. sports suspension. Part number 4008525 is also referenced against BMW OE 31336851718 for the same application.

Common Issues This Part Can Address

• Sagging front ride height
• Uneven stance at the front of the vehicle
• Loss of suspension support from a fatigued spring
• Front-end noise caused by a worn or weakened coil spring
• Restoration of factory-style spring rate after replacement

Installation Notes and Tips

Install this spring at the front position only and verify that the vehicle is not equipped with sports suspension where excluded by fitment. Because this is a coil spring, proper spring compression tools and suspension service procedures are required during installation. Confirm the original spring seat arrangement before installation, as seat included is listed as No.

Quality Assurance

Lesjofors has a long spring-manufacturing history dating back to 1852 and supplies replacement springs built to OE-level standards. The spring is manufactured, finished, and tested to support consistent fit and performance for BMW 335i and BMW 340i front suspension service.