A66-01405-004 Cross-Reference — LED Headlight for Freightliner Cascadia | Aftermarket Replacement

A66-01405-004 is an OEM part number used to identify the LED headlight for Freightliner Cascadia trucks. Most owner-operators and fleet managers end up searching for this number when a headlight gets cracked, fogged, or damaged and the dealership quote comes back far higher than expected. This guide explains what A66-01405-004 fits, which related reference numbers interchange with it, and where to order a direct-fit aftermarket replacement that ships quickly across the United States and Canada.

What A66-01405-004 Fits

Based on the matching product in our catalog, A66-01405-004 corresponds to the LED headlight for Freightliner Cascadia trucks. The fastest way to confirm you are on the right page is to check the part number printed on the label or molded into the housing of the headlight currently on your truck. If it reads A66-01405-004, or any of the interchange references below, the replacement linked on this page is the matching listing. If in doubt, send us your VIN and we will confirm fitment before you order.

Cross-Reference & Interchange

Truck manufacturers commonly list the same headlight family under several reference numbers as designs are revised or suppliers change across production years. In our catalog, A66-01405-004 is cross-referenced with the following numbers on the same replacement listing:

• A6601405002
• A6601405003
• 564.46001MK
• 6601405010
• 6601504020
• S-29601
• S-29602

If the number on your current headlight appears anywhere in the list above, the same aftermarket replacement listing applies and you can order with confidence.

Aftermarket Replacement for A66-01405-004

EverTrust Parts stocks a direct-fit aftermarket replacement for A66-01405-004: Freightliner Cascadia LED Headlight A6601405002. For most fleets and owner-operators, quality aftermarket is the practical route — you get a brand-new unit designed to match the original mounting points and connections at a fraction of typical dealer pricing.

Every order is dispatched within 24 hours, shipping is free across the United States and Canada, and the price you see at checkout is final — no import duties and no surprise fees at delivery.

Related: Freightliner Cascadia Parts Guide

EverTrust Parts is an independent aftermarket parts supplier. OEM part numbers such as A66-01405-004 are used strictly for compatibility identification purposes. The product linked above is an aftermarket replacement part, not a genuine Freightliner product, and EverTrust Parts is not affiliated with, sponsored by, or endorsed by Freightliner or any original equipment manufacturer.