TOYOTA 90159-60603 Bumper Screw with Washer

The TOYOTA 90159-60603 is a genuine OEM fastening screw with an integrated washer (bumper screw with washer), primarily designed for the secure and vibration-free mounting of body components, bumpers, and fender liners. This genuine OEM part ensures precise fitment and long service life.

Technical Characteristics and Specifications

• Type: Hex head screw with integrated washer (SEMS screw)
• Material: High-strength, hardened steel
• Surface Treatment: Corrosion-resistant zinc-plated or phosphated protective coating against environmental influences
• Application Area: Fastening bumpers, wheel arch liners, lower engine undercovers, and other plastic body components

Function and Importance

The bumper retaining screw plays a crucial role in keeping the vehicle's exterior components firmly secured at high speeds and under vibration. The integrated washer provides a broad bearing surface essential for protecting plastic mounting tabs, as it distributes clamping force evenly, preventing plastic components from cracking or pulling through during tightening.

Signs of Wear or Damage

• Corrosion and Rust: In areas exposed to mud and road salt, the screw head can corrode, complicating removal.
• Thread Damage: Overtightening or cross-threading can strip the threads.
• Loosening or Missing Fasteners: Screws loosened by vibration or lost can cause the bumper or fender liner to rattle and become unstable.