TOYOTA 90189-06196 Screw Grommet

The genuine Toyota 90189-06196 screw grommet is a premium-quality, durable plastic fastener engineered specifically for the secure mounting of vehicle body and trim components. This small yet critical component ensures that fastening screws hold firmly within sheet metal holes while protecting metal surfaces from damage and corrosion.

Technical Characteristics and Construction

• Material: High-grade, age-resistant, and heat-stabilized polyamide (nylon) that resists chemical exposure (oil, salt water) and temperature fluctuations occurring in the engine bay and on exterior body panels.
• Design: Square or round collared profile that fits precisely into factory sheet metal cutouts, preventing the grommet from spinning during screw insertion.
• Vibration Damping: Absorbs driving vibrations thanks to its resilient material structure, reducing unpleasant noise, vibration, and harshness (NVH).

Function and Significance

The primary function of the screw grommet is to provide a threaded insert for sheet metal screws in areas where direct fastening into metal is impractical or undesirable. It prevents metal-on-metal contact, thereby eliminating galvanic corrosion and rusting around hole edges. It is most commonly utilized for securing bumpers, fender liners, engine splash shields, as well as interior trims and dashboard assemblies.

Signs of Wear or Damage

• Material Fatigue and Embrittlement: Exposure to UV radiation, thermal cycling, and aging causes the plastic to lose elasticity and turn brittle.
• Installation Damage: During panel removal or excessive screw torque, the internal threads can strip or the retaining tabs can snap off.
• Rattling Noises: If the grommet loosens or breaks, the attached trim panels will vibrate, leading to rattling or knocking sounds during operation.

To ensure reliable fastening and precise factory fitment, replacing damaged or aged grommets with genuine Toyota OEM parts is always recommended.