TYC 18-5988-00 Side Marker Light Assembly - Rear Left

Rear Left Side Marker Light for Lexus IS300 and RX300

Restore rear visibility and exterior lighting function with this TYC rear left side marker light assembly. Built as a complete assembly with a red lens and halogen bulb included, it is a direct replacement for the rear side marker lamp on select Lexus applications.

Fits 2001-2005 Lexus IS300, rear left. Fits 1999-2003 Lexus RX300, rear left. This TYC Regular part number 18-5988-00 is made for drivers replacing a damaged, faded, or non-working rear side marker light on the Lexus IS300 or Lexus RX300.

Key Features

• Part type: side marker light assembly
• Position: rear left
• Lens color: red
• Bulb included: yes
• Bulb type: halogen
• Complete assembly for direct replacement
• Lens material: plastic
• Housing material: plastic
• Bolt-on attachment method
• Cross-reference: Lexus 81760-48010 and Partslink LX2860101

Product Details

TYC Regular 18-5988-00 is a rear side marker light assembly engineered for confirmed Lexus fitment. The red lens, plastic housing, and included halogen bulb provide a straightforward replacement for the rear left lamp on 2001-2005 Lexus IS300 and 1999-2003 Lexus RX300 models. As a complete assembly, it is suited for replacing a cracked lens, a burned-out marker lamp, or a weathered unit that no longer matches the vehicle’s exterior lighting condition.

This part cross-references Lexus 81760-48010 and Partslink LX2860101 for the same application. Use part number 18-5988-00 when searching for a rear left side marker light assembly for Lexus IS300 or Lexus RX300 vehicles.

Common Issues This Part Can Address

• Broken or cracked rear side marker lens
• Dim or non-functioning rear marker light
• Water intrusion into the lamp assembly
• Faded or discolored exterior lighting lens
• Mismatch after prior collision repair

Installation Notes and Tips

This assembly uses a bolt-on attachment method. Verify the rear left position before installation and compare the connector, mounting points, and lamp shape to the original unit. Because hardware is not included, reuse existing mounting hardware if serviceable or source the correct fasteners separately. Confirm bulb operation after installation and check lamp alignment for proper fit on the vehicle body.

Quality Assurance

TYC Regular replacement lighting components are built for direct-fit service on the listed Lexus applications. Part number 18-5988-00 is intended to match the original rear side marker lamp configuration for the specified IS300 and RX300 model years.