BMW Z4 E85 Third Stop Lamp Brake Light Red 6917378

Visual condition of the part

The product shows signs of use visible in the photos.

BMW Z4 E85 Third Stop Lamp Brake Light Red is an original component from the Main and central brake lights group, designed specifically for the BMW Z4 E85 generation models. The red third brake light improves vehicle visibility from the rear, increasing safety during braking while maintaining a consistent, factory look of the rear bodywork.

Specifications and technical data

• SKU: 6917378-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6917378
• Substitutable numbers: 6917378, 63256917378
• Color: Red
• Category: Centre & Third Brake Light Assemblies

Purpose and function in the lighting system

The third brake light in the BMW Z4 E85 plays an important role in communicating with other road users, signaling braking at the eye level of drivers behind. By being placed in the central, elevated part of the body, this component complements the main brake lights, improving the readability of the light signal in heavy traffic and during poor weather conditions.

The offered element is part of the original BMW lighting system, which ensures proper light distribution, correct cooperation with the vehicle's electrical installation, and compliance with factory safety standards.

Construction, color, and fitment

The housing of the third brake light has been designed for the specific dimensions and shape of the BMW Z4 E85 body, allowing for precise fitment with the trunk lid or the panel where it is mounted. The red color of the lens is selected to provide a clear, readable braking signal while harmoniously blending with the rear of the car.

Thanks to the use of original mounting geometry and appropriately selected optics, the brake light maintains the body line after installation and does not require any bodywork modifications. This is a beneficial solution both in terms of aesthetics and technical performance.

Condition, origin, and benefits of use

The element comes from the BMW range and is an OEM segment product, which means it maintains factory manufacturing standards and compatibility. As a used part, it represents a reasonable compromise between repair costs and maintaining the original character of the vehicle, which is particularly important in models such as the Z4 E85.

Using an original third brake light allows you to:

• maintain the stylistic consistency of the rear bodywork,
• preserve the correct distribution and intensity of light during braking,
• avoid fitment problems typical of universal aftermarket replacements.

Safety and operational aspects

A properly functioning third brake light is essential for driving safety, especially in urban traffic and on highways, where quick reaction from drivers behind is crucial. A functional, red braking signal helps reduce the risk of rear-end collisions and improves the overall visibility of the car.

Replacing a faulty or damaged element with an original third brake light dedicated to the BMW Z4 E85 is a way to restore full functionality of the lighting system without compromising on quality and fitment.

If you are planning a comprehensive repair or upgrade of the rear lighting zone in your BMW and need other elements from the same group, such as main brake lights, central brake lights, or additional lighting modules, check the available parts in the BMW main and central brake lights category.

To compare how manufacturers approach maintaining brand character and the role of original components in preserving factory quality, it is worth reading the article Audi and emotions in their purest form – how used parts help maintain the brand's DNA, which shows the importance of properly selected elements also in other premium brands.