What causes the flickering when replacing LED bulbs in Volkswagen?

[PeytonLee]

Volkswagen replacing LED bulbs with flickering when powered on is likely due to induced electricity, as many wires are bundled together in sleeves or placed closely. When one wire is energized, others generate induced electricity, and LEDs can illuminate with very small currents. It is recommended to retrofit xenon lights with bi-xenon projectors to achieve the original xenon mode, which is the optimal solution. Below is relevant information about automotive headlights: 1. The power of original headlights is generally around 55w, with an operating current of approximately 4.5A, while LED lights typically have a power of only 20w-25w. The starting current generally requires 4A-8A for normal startup, and after successful startup, the operating current is only around 1.5-3A. At this point, the vehicle's computer will detect abnormal current. 2. Some vehicles alert through the dashboard, while others automatically shut off. After shutting off, because the vehicle's power switch is already on, the vehicle will relight the bulbs, resulting in the phenomenon of continuous flickering of the vehicle's lights. This situation requires the use of ballasts or decoders.

[ArielDella]

After I replaced the halogen bulbs with LED bulbs in my Volkswagen, the lights kept flickering when powered on, and I immediately sensed something was wrong. This is usually because Volkswagen's original circuit design is tailored for halogen bulbs, which have a different voltage output pattern. The new LED bulbs are more sensitive and prone to flickering due to unstable current. Additionally, poor bulb quality or poor base contact can be major issues—I once had to clean the connection points thoroughly to see improvement. Moreover, if the vehicle’s power supply, such as the alternator, is aging, the voltage fluctuations become more severe, worsening the flickering. I recommend avoiding cheap LED bulbs and opting for well-compatible brands or adding a resistor to balance the load. Driving with flickering lights is dangerous, especially at night when visibility is already compromised. Eventually, I went straight to a repair shop to get it fixed—it’s hassle-free and much safer.

[IanLee]

I think the LED flickering is mostly caused by power supply mismatch. After replacing the lights on Volkswagen vehicles, the car uses PWM (Pulse Width Modulation) signals to control brightness, but some LED driver circuits conflict, causing flickering. There's also abnormal relay response, changes in bulb resistance, and the system misjudging the current. I must remind you to check all wiring and fuses, ensuring the grounding is secure and free from corrosion. Choosing upgrade parts specifically designed for Volkswagen is more hassle-free—don't go for cheap options, as low-quality LEDs are prone to failure. Regular maintenance of the vehicle's electrical system can prevent this issue; don't wait until an accident happens while driving at night to fix it.

[SanLane]

When the Volkswagen's LED bulb flickers, it may be caused by compatibility issues. The vehicle's circuit is not adapting to the new bulb, with unstable current or loose wiring being potential factors. Check if the bulb is compatible and clean the connectors and base. If the issue persists, revert to the old bulb or add a stabilizing component. Address the problem early to avoid blind spot risks while driving.