OSRAM Original Line P21/5W bulb (7528)

OSRAM Original Line 7528 is a genuine OEM quality P21/5W twin filament bulb designed to meet the strict original equipment requirements of car manufacturers. This bulb is known for its exceptional reliability and precise light distribution, making it a safe choice for your car's most important signal lights.

The P21/5W bulb is typically used in combined brake and tail lights. Its more powerful 21 watt filament lights up when the brake is applied, while the dimmer 5 watt filament burns continuously as a tail light. The special BAY15d base is equipped with asymmetrical pins located at different heights. This mechanical safety feature ensures that the bulb cannot be installed in the wrong direction, which would confuse the brake and tail light outputs.

Key features:

• Genuine OEM quality: The same bulb used in millions of new cars at the factory.
• Dual-function performance: Bright 21W brake light and reliable 5W tail light in one package.
• BAY15d base: Asymmetrical pins (with different heights) ensure correct installation.
• Vibration-resistant: Designed to withstand constant vehicle movement and electrical system fluctuations.

Technical specifications (additional information):

• Brand: OSRAM
• Product line: Original Line
• Voltage: 12 V
• Power: 21 / 5 W
• Base: BAY15d (asymmetrical pins with different heights)
• Color temperature: 2800 K
• Luminous flux: 440 / 35 lm
• Product number: 7528
• ECE category: P21/5W

Tip: When replacing the brake light bulb, it is highly recommended to replace both sides at the same time. This will ensure that the brightness of the rear lights is completely symmetrical and prevent one side from burning out again soon.