51117331770 Bumper Molding | Exterior Trim Reinforcement System

The 51117331770 Bumper Molding features vacuum-metallized chrome plating with 12μm nickel undercoating, achieving 9H surface hardness for F10/F11 Luxury Line models. Its injection-molded ABS substrate maintains 0.2mm dimensional tolerance across the 1,480mm length, ensuring seamless integration with bumper contours. The triple-layer UV coating provides 10-year corrosion resistance in road salt environments, while the concealed clip design preserves factory-style 0.6mm panel gaps.

Aerodynamic edge profiling reduces wind turbulence by 18% at highway speeds compared to aftermarket alternatives. The thermal-compensated mounting system accommodates ±2.5mm bumper flex without stress marks, utilizing stainless steel reinforcement brackets rated for 50,000 vibration cycles. Precisely positioned alignment notches ensure 2-minute installation compatibility with OEM bumper sensors.

Manufacturing Specifications

• • Substrate: ABS+PC blend
• • Chrome Thickness: 0.35±0.05mm
• • Thermal Range: -30°C to 90°C
• • Clip Retention Force: 35N
• • Surface Gloss: 95GU @60°

Verified applications: F10 550i 2013-2016 F11 535d Touring 2014-2017 F07 530i GT 2015-2017 F18 528Li Executive
OE Cross References: 51 11 7 331 770 51.11.7.331.770 51117331770 BMW-51117331770 51-11-7-331-770