Bulb Socket BMW E90 E91 Front Headlamp Turn Indicator PY 21W VALEO 7159571

Bulb Socket BMW E90 E91 Front Headlamp Turn Indicator PY 21W VALEO is an original front lighting system component designed for use with a PY 21W turn signal bulb. Thanks to its precise fit for BMW 3 Series E90/E91 headlights, it ensures stable bulb seating, a reliable electrical connection, and proper operation of the signaling system. This is a practical solution for users who want to restore full functionality to their front turn signals while maintaining manufacturer standards.

Specifications and technical data

• SKU: 7159571-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7159571
• Substitutable numbers: 63117159571, 7159571
• Location on the vehicle: Front
• Category: Light Bulbs & LEDs

Purpose and function of the PY 21W bulb socket

The Bulb Socket BMW E90 E91 Front Headlamp Turn Indicator PY 21W VALEO is responsible for mechanically securing the bulb in the headlight and ensuring a reliable contact connection with the vehicle's electrical system. In the front of the car, this component operates under high temperatures and is exposed to vibrations, which is why proper fitment and build quality are crucial for the stable operation of the turn signals.

Using a dedicated socket for the PY 21W bulb allows you to:

• maintain the correct position of the bulb in the headlight reflector,
• minimize the risk of flickering or light failure due to poor contact,
• ensure compatibility with the electrical harness in the front of the vehicle.

Compatibility with BMW E90/E91 and build quality

The component has been designed specifically for BMW 3 Series E90 and E91 front headlights, which translates into a proper fit with the headlight housing and the designated mounting location. The appropriate geometry of the socket facilitates the installation of the PY 21W bulb and ensures it is correctly locked in the housing, which is essential during frequent temperature changes and vibrations while driving.

VALEO is one of the primary suppliers of original equipment lighting components, which is why the materials used and the design of the socket are adapted to BMW's factory requirements. As a result, consistency in electrical and mechanical parameters with the original lighting system is maintained.

Component condition and service application

The bulb socket is offered as a part from the Lamps and LED lights category, which makes it easier to select within the vehicle's lighting system. As a used component, it provides a cost-effective service solution for headlight repairs, replacing damaged housings, or restoring turn signal functionality after electrical system interference.

In practice, the socket is suitable for, among other things:

• repairing a damaged turn signal holder in the front headlight,
• restoring the electrical system after a front-end collision,
• resolving intermittent turn signal issues caused by worn contacts.

Benefits of using an original socket in the lighting system

Using a dedicated PY 21W bulb socket in a BMW E90/E91 allows you to maintain consistency with the factory installation, which is important for both safety and proper interaction with the vehicle's electronics. A stable electrical connection reduces the risk of light control system errors and incorrect turn signal operation.

If you are planning a comprehensive repair or upgrade of the front lighting area in your BMW and need other components from the same group, such as holders, control modules, or complete headlights, check out the available parts in the BMW Lamps and LED lights category.

More about selecting and replacing lighting components

When working with headlights and bulb sockets, it is worth paying attention to the selection of appropriate components to avoid issues with light adjustment or error messages. Detailed tips on choosing used lighting components, including LED and Xenon headlights for BMW, can be found in our guide: See more and better – a complete guide to selecting and replacing used LED and Xenon headlights.