Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.

Optronics · Electrical & Lighting
MCL63AB
In stock · ships from Knoxville
The Optronics MCL63AB is an amber thin-line LED marker/clearance light with 4 diodes and a faceted reflector.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 5 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Other applications
Other applications
Fits any vehicle with industry-standard 3-inch on-center mounting holes and a 2-pin wiring plug. Mounting bracket (A-65B) and wiring plug (A-65P) sold separately.
Part data verified against 5 catalog sources
Different year, make, or config? Get a confirmation against your truck in under a minute.
It serves as a side marker or clearance light on heavy-duty trucks, trailers, and commercial vehicles to improve visibility and meet DOT/SAE standards. The light is sonically sealed for waterproof durability, with a polycarbonate lens and housing that resists impact and UV. Typically replaced when the lens is cracked, LEDs fail, or the light no longer meets brightness requirements.
Part Number: MCL63AB
LED LIGHT, MICROFLEX THIN LINE
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside electrical & lighting