Dual color feature
For example: white+yellow
When you turn on the signal (as a direction indicator), it switches to yellow light.
When the signal is turned off, it switches to white light.
(Have turned to the signal Yellow work. white light Put out. No yellow signal. white light work)
Break through interface barriers to achieve 'one bulb for all'
Car owners and technicians familiar with headlight upgrades are not unfamiliar with the 'twin' interfaces P21W and PY21W.
They are similar in size and power, but the subtle 30-degree difference in the angle of the interface's prongs is like a chasm, making them incompatible.
When purchasing, car owners must accurately distinguish between them; otherwise, they will face the embarrassment of being unable to install them.
100% CANbus Compatible: Say Goodbye to Error Codes
For many car owners looking to upgrade their halogen lights to LEDs, the vehicle's internal CAN bus system is often a major obstacle.
Due to the extremely low power consumption of LED lights, the vehicle's computer may mistakenly interpret this as a bulb failure,
triggering warning lights on the dashboard (such as the bulb warning indicator) or causing abnormal rapid flashing of turn signals (hyper-flashing).
Application:
P21W Bulb: Commonly referred to as BA15S or 1156, it has a spherical shape and is mostly used for rear turn signals in vehicles, but can also be used for brake lights and rear fog lights. For example, the rear brake lights of the 2013 Volkswagen Polo, the brake lights of the Emgrand GS, and the rear fog lights of models like the C4 Picasso and new Arteon all use the P21W bulb. • PY21W Bulb: Often called BAU15S, it has a similar shape to the P21W but differs in the angle of its contacts. The PY21W is primarily used for front turn signals in vehicles, such as the front turn signals of the BYD F3 and Mercedes-Benz S-Class models.
