Quick Answer
This Hyundai Custin 2021-on development case explains a vehicle-specific LED DRL and fog-light program from original vehicle review through finished-product inspection. The workflow keeps the vehicle interface, requested functions and customer approval aligned before tooling starts. For each RFQ, WINAUTO should still confirm the buyer’s market version, trim, bumper details and required functions.
Project starting point
The customer requested a vehicle-specific lighting solution for Hyundai Custin 2021-on. The supplied project material is recorded as belonging to this Custin program. The engineering brief covers the original fog-lamp-frame interface, the required lighting functions and the fitment objective before production tooling is approved.
1. Original vehicle and fog-lamp-frame review
The process begins by reviewing the original vehicle, bumper area, fog-lamp frame, mounting points and available reference parts. This creates the physical basis for a vehicle-specific design rather than a universal bracket.

2. CAD design and structural development
The proposed housing, mounting features, optical layout and wiring approach are developed from the confirmed reference data. The customer can review the intended design direction before sample production.

3. 3D-printed prototype and fitment confirmation
A 3D-printed prototype is used to assess geometry, clearance, appearance and mounting fit before steel-mold development. This is the key customer approval gate: design corrections are much easier during the prototype stage than after tooling begins.

4. Steel-mold development
Once the sample and fitment are confirmed, steel-mold work can begin. Tooling is a major cost and change-control decision, so the approved design should be documented before this stage.

5. Plastic injection molding
The approved mold forms the housing, frame and other plastic components. Geometry and mounting features are checked against the approved project configuration.

6. LED electronics preparation
LED boards, wiring and related electronics are prepared according to the agreed functions. The exact configuration must be confirmed for the customer’s vehicle and target market.

7. LED light-guide production
For designs using a light guide or tube, the lighting element is made to the approved vehicle-specific outline and prepared for final assembly.

8. Assembly of electronics and molded parts
The housing, light guide or lens, LED electronics and wiring are assembled into the agreed product configuration.

9. Aging and product testing
Finished units undergo the project’s defined aging and lighting checks before shipment inspection. Specific test scope, documentation and destination requirements should be defined in the RFQ.

10. Finished-product inspection
The final inspection checks the finished assembly against the approved appearance and project configuration before customer review or shipment.

What buyers should provide
Please provide the vehicle make, model, year, trim or bumper photos, target market, required lighting functions, original-part references, branding requirements and expected order quantity. This allows WINAUTO to review the project scope before quoting.
Frequently Asked Questions
Why confirm a 3D sample before steel-mold development?
The prototype stage gives the buyer and engineering team a chance to confirm shape, clearance and mounting fit before tooling becomes the main change-control point.
Is this program suitable for every Hyundai Custin?
This case covers Hyundai Custin 2021-on based on the supplied project information. Each buyer should still provide market, trim and bumper details so WINAUTO can verify the requested configuration for the actual order.
How is this related to OEM and ODM service?
The process is an example of a vehicle-specific development workflow. Learn more about WINAUTO OEM and ODM lighting development and 3D printing in automotive lighting.
Start a Hyundai Custin lighting project
For a wholesale or OEM/ODM discussion, contact WINAUTO with the vehicle information and lighting brief. You can also review our OEM & ODM services, LED DRL products, fog-light products and factory information.
