Hella 7528 Daytime Running Light Bulb

Hella 7528 Daytime Running Light Bulb

The Hella 7528 daytime running light bulb is a 12V incandescent replacement built for exterior lighting applications that use a P21/5W-style dual-filament bulb with a BAY15d socket. It is a practical OE-style choice for drivers servicing daytime running lights, position lamps, or rear lamp circuits on a wide range of vehicles, including select Hyundai Tucson, Kia Sportage, and Mercedes-Benz Sprinter applications.

• 12.00V incandescent bulb for exterior lighting use
• 21W primary wattage with 5W secondary wattage
• S-8 bulb type with DC Index base type
• Direct replacement format for BAY15d socket applications
• Fits a broad range of import and domestic vehicles across multiple model years

Product Details

Built under the Hella brand line, this bulb reflects the company’s long-standing focus on automotive lighting and electronic components. Hella 7528 is specified for vehicles calling for a 12V P21/5W incandescent bulb, and the fitment data includes applications such as 2022 Hyundai Tucson, 2022 Kia Sportage, 2021 Jeep Compass, 2021 Ford Edge, and 2018-2020 Volkswagen Jetta. This part cross-references Hella 7528 for the same application.

Use this bulb when you need a straightforward replacement for exterior lamp circuits that rely on a dual-intensity incandescent design. It is listed across many fitments from 1991 through 2022, making it a useful service part for older European vehicles and newer compact SUVs, vans, and passenger cars.

Common Problems It Can Solve

• Inoperative daytime running light output
• Dim or uneven exterior lamp illumination
• Failed dual-filament bulb in a BAY15d socket
• Bulb replacement during routine exterior lighting service
• Restoring proper front or rear lamp function on listed vehicles

Installation Notes and Tips

Confirm the original bulb specification before installation. This bulb is listed for 12V applications with P21/5W-style requirements and BAY15d socket type notes in the fitment data. Match the vehicle’s lamp position and any fitment notes exactly, especially on models with halogen headlamps, projector headlamps, LED tail lights, or early-model lighting configurations.

For best results, handle the bulb carefully during installation and verify proper operation after replacement. If the vehicle uses a sealed or hard-to-access lamp housing, inspect the connector and socket condition before installing the new bulb.

Quality Assurance

Hella develops and manufactures automotive lighting and electronic components with a long history in OE-focused engineering and precision workmanship. The brand’s global manufacturing and research footprint supports consistent product development for lighting service parts like the 7528 bulb.