LEMFÖRDER 37345 01 Track Control Arm For BMW 5 TOURING

LEMFÖRDER 37345 01 Track Control Arm – Precision Engineering for the BMW 5 Touring

The LEMFÖRDER 37345 01 is a high‑performance Track Control Arm (WISHBONE) engineered specifically for the rear left side of the BMW 5 Touring (F11/F07) models produced between 2009 and 2017. Designed to replace the original equipment component, this part delivers superior durability, improved handling dynamics, and a seamless fit that preserves the vehicle’s factory alignment characteristics.

Key Features

• Exact OEM Fitment: Matches all dimensional tolerances of the original rear left wishbone, ensuring perfect integration with the suspension geometry.
• High‑Strength Construction: Made from a high‑grade alloy steel that undergoes rigorous heat treatment and surface hardening to resist fatigue and corrosion under extreme driving conditions.
• Optimized Geometry: The arm’s shape is refined to reduce stress concentrations, providing smoother ride quality and minimizing wear on associated bushings and ball joints.
• Lightweight Design: While maintaining strength, the component is engineered for reduced mass, contributing to lower unsprung weight and improved acceleration response.
• Pre‑Lubricated Joints: Critical pivot points are pre‑lubricated with a long‑lasting grease seal, reducing maintenance intervals and ensuring reliable operation from installation onward.

Compatibility Overview

The LEMFÖRDER 37345 01 is specifically calibrated for:

• Model Years: 2009‑2017 BMW 5 Touring (F11) and F07 variants.
• Drive Configuration: Rear left side only; the right side uses a mirrored component with its own part number.
• Suspension Type: Standard rear suspension system featuring a wishbone architecture.

Because of its precise OEM specifications, the arm can be installed without requiring additional modifications to the chassis or suspension components. It is fully compatible with the factory steering rack, control arms, and wheel hub assemblies.

Installation Guide

1. Preparation: Secure the vehicle on a stable lift and disconnect the battery to prevent accidental power activation of any electronic systems.
2. Removal of Old Arm: Loosen the mounting bolts that attach the existing wishbone to the rear subframe. Carefully detach the arm, noting the orientation of the bushings and ball joint connections.
3. Inspection: Examine the subframe mounting points for any damage or corrosion. Clean all surfaces with a solvent cleaner and apply anti‑corrosion primer if necessary.
4. Installation of New Arm: Position the LEMFÖRDER 37345 01 onto the subframe, aligning it precisely with the mounting holes. Secure the bolts to the specified torque sequence (typically 80 Nm followed by a 30‑second dwell).
5. Reconnection of Suspension Links: Attach the control arm to the wheel hub assembly using the factory ball joint and bushing set. Verify that all fasteners are tightened to spec.
6. Alignment Check: Perform an initial alignment check to confirm that the suspension geometry remains within manufacturer tolerances. Adjust as necessary before proceeding.
7. Final Inspection: Inspect all connections, ensure no play in the ball joint or bushing, and verify that the arm is free from interference with other components.

Performance Benefits

• Enhanced Handling: The improved stiffness of the LEMFÖRDER 37345 01 reduces unwanted flex during cornering, resulting in tighter steering response and increased confidence at high speeds.
• Reduced Unsprung Weight: By employing a lightweight alloy construction, the component lowers unsprung mass, which translates into better wheel control over uneven road surfaces.
• Longer Component Life: The heat‑treated steel and pre‑lubricated joints resist wear, extending the service life of the suspension system compared to standard aftermarket alternatives.
• Consistent Ride Quality: Maintaining OEM geometry ensures that ride comfort is preserved while still delivering performance gains.

Maintenance Tips

Although the LEMFÖRDER 37345 01 is designed for low maintenance, periodic checks are recommended to ensure optimal operation:

• Quarterly Inspection: Check for any signs of corrosion on mounting bolts and the arm body. Clean with a rust remover if necessary.
• Ball Joint & Bushing Condition: Inspect for wear or play during a suspension walk‑around. Replace components if excessive movement is detected.
• Torque Verification: After any major repair or impact event, re‑torque the mounting bolts to maintain structural integrity.

Material Composition and Durability

The alloy steel used in the LEMFÖRDER 37345 01 is selected for its high tensile strength (≥ 600 MPa) and excellent fatigue resistance. The surface undergoes a phosphating process followed by a protective coating that resists chloride attack, making it suitable for coastal environments and winter road salt exposure.

Design Philosophy

The design team behind the LEMFÖRDER 37345 01 focused on replicating the original BMW engineering philosophy: precision, reliability, and performance. By studying the OEM geometry through advanced CAD modeling and finite element analysis (FEA), they identified critical stress points and optimized the arm shape to distribute loads more evenly.

Installation Compatibility with Modern Diagnostics

Because the component is a direct replacement for the factory part, it does not interfere with any of BMW’s electronic suspension control systems. The vehicle’s onboard diagnostics (OBD) will continue to function normally, and no re‑programming or sensor recalibration is required.

Conclusion

The LEMFÖRDER 37345 01 Track Control Arm represents the pinnacle of aftermarket suspension engineering for the BMW 5 Touring. Its exact OEM fitment, superior material quality, and thoughtful design deliver tangible improvements in handling, ride comfort, and component longevity—all while preserving the vehicle’s original alignment characteristics.

Whether you are restoring a classic touring sedan or upgrading a modern model for spirited driving, this track control arm provides the reliability and performance that discerning BMW owners expect.