51757340743 Fender Liner | Structural & Protective Compliance

Designed for BMW 5 Series G30/G31 models, the 51757340743 Fender Liner utilizes rotational-molded polypropylene construction with integrated impact deflection ribs. The structural geometry precisely mirrors factory wheel arch contours, creating a seamless barrier against road debris and moisture intrusion. Reinforced mounting points withstand constant vibration from tire rotation while maintaining precise alignment with factory bolt patterns. Hydrodynamic ridges efficiently channel water away from sensitive components, reducing corrosion risk in wheel wells by 68% compared to standard designs.

Surface texturing minimizes stone chip noise during highway driving while resisting abrasion from gravel impact. The flexible polymer matrix maintains dimensional stability across -30°C to 90°C temperature extremes and features UV inhibitors to prevent material degradation. Integrated service access ports allow maintenance without removal, and the aerodynamic profile reduces wind turbulence around front wheels. Installation requires no modification to factory mounting locations, with color-matched fasteners ensuring discreet integration.

Engineering Specifications

• • Material: Reinforced polypropylene copolymer
• • Thickness Gradient: 3.2mm-4.8mm variable
• • Temperature Range: -35°C to 95°C
• • Impact Resistance: 22 kJ/m² Charpy
• • UV Stabilization: 3000hr QUV tested
• • Weight: 1.8kg per side (average)

OE Reference Network: 51757340743 51757340744 51-75-7-340-743 51-75-7-340-744 51 75 7 340 743 51 75 7 340 744 51.75.7.340.743 51.75.7.340.744 7340743 Radkastenverkleidung