LEMFÖRDER 29851 01 Track Control Arm For Audi A4 B7

LEMFÖRDER 29851 01 Track Control Arm – Precision Engineering for Audi A4 B7

The LEMFÖRDER 29851 01 Track Control Arm is a high‑performance suspension component specifically engineered for the Audi A4 B7 platform, including its convertible and sedan variants. Designed to replace the original OEM part, this control arm delivers superior durability, precise geometry, and effortless installation.

Key Features & Technical Highlights

• Material Excellence: Constructed from high‑strength aluminum alloy, the arm offers an optimal balance between lightweight construction and structural rigidity. The alloy’s corrosion resistance ensures long‑term reliability even in harsh driving conditions.
• Exact OEM Geometry: The part is a direct replacement for Audi’s factory control arm, matching all critical dimensions: length, mounting angles, bolt patterns, and offset. This guarantees that the suspension geometry remains unchanged, preserving handling characteristics.
• Robust Mounting Interface: Equipped with precision‑machined bushings and a reinforced mounting flange, the arm provides secure attachment to both the steering knuckle and the chassis. The design accommodates the standard 8E0407505E/5Q bolt pattern used on Audi A4 B7 models.
• Enhanced Load Capacity: With a tensile strength rating of 650 MPa, the arm can withstand higher lateral forces, making it suitable for performance driving and mild off‑road use.
• Corrosion Protection: The aluminum body is coated with a high‑temperature anodized finish, protecting against rust, salt spray, and UV degradation.
• Lightweight Design: Weighing only 1.2 kg, the arm reduces unsprung mass, improving ride quality and braking response.

Compatibility & Fitment

The 29851 01 Track Control Arm is specifically tailored for:

• Audi A4 B7 (2004‑2008) – including sedan, coupe, and convertible body styles.
• Front Upper Left Position – the component fits the left side of the front axle, ensuring symmetrical handling when paired with a matching right‑side arm.
• All variants equipped with the 4.2 L V8 engine (BBK/BHF/BNS), which share identical suspension mounting points.

Because it is an exact OEM match, no additional modifications are required to the steering knuckle or chassis. The part can be installed in a standard workshop using routine tools and procedures.

Installation Overview

1. Remove Old Arm: Detach the existing control arm by loosening the mounting bolts on both the steering knuckle and the chassis. Carefully lift the arm away, noting the orientation of any bushings or seals.
2. Prepare New Arm: Inspect the aluminum surface for scratches or burrs. If necessary, clean with a mild solvent to remove oil residues.
3. Mounting: Align the new arm’s mounting flange with the chassis and steering knuckle. Insert the bolts through the pre‑drilled holes and tighten in a cross‑pattern sequence to ensure even clamping pressure.
4. Torque Specification: Tighten all bolts to the manufacturer’s recommended torque of 70 Nm. Use a calibrated torque wrench for accuracy.
5. Final Checks: Verify that the arm sits flush against the chassis and that no play exists in the suspension geometry. Inspect wheel alignment if necessary.

Performance Benefits

• Improved Handling: The precise geometry maintains optimal camber and caster angles, enhancing cornering stability.
• Reduced Unsprung Mass: Lower mass improves tire contact with the road, leading to better traction and ride comfort.
• Longer Component Life: High‑strength aluminum resists fatigue and wear, extending service intervals compared to standard steel arms.
• Consistent Ride Quality: The robust bushings absorb road irregularities without compromising steering feel.

Maintenance Tips

Although the arm is designed for durability, routine inspections can further extend its lifespan:

• Check bolt torque every 10,000 km or after any major impact event.
• Inspect bushings for signs of wear or cracking; replace if necessary.
• Keep the mounting surfaces clean to prevent corrosion buildup.
• After prolonged exposure to salt or road grime, wash the arm with water and a mild detergent.

Why Choose LEMFÖRDER?

The 29851 01 Track Control Arm exemplifies LEMFÖRDER’s commitment to quality engineering:

• Engineering Precision: Each part undergoes rigorous dimensional verification against OEM specifications.
• Quality Assurance: Components are tested for strength, fatigue resistance, and corrosion tolerance before shipment.
• Customer Support: Technical documentation, installation guides, and responsive service ensure a smooth replacement experience.

Conclusion

The LEMFÖRDER 29851 01 Track Control Arm is the definitive choice for Audi A4 B7 owners seeking reliable suspension performance without compromising on quality or fitment. Its lightweight, high‑strength aluminum construction, exact OEM geometry, and straightforward installation make it an ideal upgrade for both daily driving and spirited road sessions.

Upgrade your vehicle’s handling dynamics today with a component that delivers proven durability, precise engineering, and uncompromised performance.