Lesjofors 4008403 Coil Spring - Front

OE-Quality Front Coil Spring

Lesjofors 4008403 is a front coil spring for select BMW 318i and 318is applications. It is built from high-strength steel and finished for corrosion resistance, making it a direct replacement for worn or sagging suspension springs.

Compatible With 1991 BMW 318i, front and 1984-1985 BMW 318i, front, as well as 1991 BMW 318is, front.

Key Features

• Front coil spring for suspension service and ride-height restoration
• Manufactured from high-strength steel
• Heat treated, shot peened, and pre-set for consistent spring performance
• Zinc phosphate coated and epoxy powder coat painted for added corrosion protection
• Seat included: No
• Part number: 4008403

Detailed Description

Lesjofors 4008403 is engineered as an OE-quality replacement coil spring for the front suspension on BMW 318i and BMW 318is models listed in the fitment data. Lesjofors has a long spring-making history and supplies replacement springs built to meet demanding factory-style specifications. This part cross-references BMW OE numbers 31331126399 and 31331127284 for the same application.

For buyers searching for a front coil spring for 1991 BMW 318i, front suspension repair for 1984-1985 BMW 318i, or a replacement spring for 1991 BMW 318is, this part number 4008403 provides a direct-fit service option.

What This Spring Helps Address

• Sagging front ride height
• Broken or fatigued coil spring replacement
• Uneven front suspension stance
• Loss of original spring rate from age and corrosion
• Front-end noise caused by a damaged spring

Installation Notes and Tips

Install 4008403 on the front axle only for the listed BMW applications. Because coil springs store significant energy, use proper spring-compression tools and follow factory service procedures during removal and installation. Inspect related suspension components, including strut mounts and isolators, before reassembly.

Quality Assurance

Lesjofors coil springs are manufactured to OE-quality standards using heat treatment, shot peening, presetting, and protective coatings to support consistent performance and corrosion resistance.