lesjofers 4004255 Coil Spring Front

Lesjöfors 4004255 Coil Spring Front

The Lesjöfors 4004255 Coil Spring Front is a high‑performance suspension component engineered for the front axle of Audi A6, C5 Avant, and related models. Designed with precision metallurgy and advanced spring geometry, this coil spring delivers superior ride comfort, handling stability, and durability under demanding driving conditions.

Key Technical Specifications

• Model Number: 4004255
• Application: Front suspension of Audi A6 (various engine sizes), C5 Avant, and similar platforms.
• Spring Type: Helical coil spring (spiralfeder / molla elicoidale).
• Material: High‑strength alloy steel with heat treatment for optimal resilience.
• Coil Diameter: Standard OEM dimensions compatible with original front axle assemblies.
• Load Capacity: Designed to handle the dynamic loads of both passenger and light commercial variants.

Design Features & Performance Benefits

The spring’s design incorporates several engineering advancements that enhance vehicle dynamics:

1. Optimized Helix Geometry: The coil pitch and diameter are calibrated to provide a smooth progressive rate, reducing harshness over bumps while maintaining stiffness during cornering.
2. Heat‑Treated Steel Core: Heat treatment increases tensile strength and fatigue resistance, ensuring long service life even under high‑frequency road impacts.
3. Precision Manufacturing: Tight tolerances in coil winding guarantee consistent performance across all units, matching OEM standards for ride quality.
4. Corrosion Resistance: Protective coatings and alloy composition guard against rust and environmental degradation, extending the spring’s operational lifespan.

Installation & Compatibility

Installing the Lesjöfors 4004255 Coil Spring Front is straightforward for technicians familiar with front axle assemblies. The spring fits directly into the OEM mounting brackets without modification:

• Remove the existing coil spring and associated hardware.
• Place the new spring onto the axle shaft, ensuring correct orientation of the coil ends.
• Secure the spring with the supplied bolts or retainers, tightening to manufacturer torque specifications.
• Reinstall suspension components (shock absorbers, control arms) and perform a wheel alignment if necessary.

Applications Across Audi Models

The Lesjöfors 4004255 Coil Spring Front is specifically engineered for:

• Audi A6 2.4L, 2.8L, and 3.0L engines (1999‑2005)
• C5 Avant variants with similar engine configurations
• Other front‑axle platforms that share the same suspension architecture, such as certain S6 models.

Quality Assurance & OEM Compliance

Lesjöfors is a renowned manufacturer of automotive suspension components. The 4004255 coil spring undergoes rigorous testing to meet or exceed Audi’s original equipment specifications:

• Dynamic load testing under simulated driving conditions.
• Fatigue life assessment through accelerated cycling tests.
• Dimensional verification against OEM tolerances.

Maintenance Tips for Longevity

While the coil spring itself is a passive component, proper maintenance of the surrounding suspension system can extend its useful life:

1. Regularly inspect mounting bolts and retainers for tightness.
2. Check for signs of wear or damage on adjacent shock absorbers and bushings.
3. Keep the suspension area clean to prevent corrosion.
4. Perform periodic wheel alignment checks after any suspension work.

Conclusion

The Lesjöfors 4004255 Coil Spring Front exemplifies high‑quality automotive engineering, offering a blend of comfort, performance, and durability for Audi’s front‑axle platforms. Its precise construction, material excellence, and OEM compatibility make it an ideal choice for both routine replacements and performance upgrades.