BMW 7 Series F01 Rear Seal Door Trim Gap Bottom Lower Left Right N/O/S 7178017

The BMW F01 Rear Door Seal Lower is an original body part from the Door Seals group, designed for the rear of the vehicle. It ensures a tight door closure, reduces road noise, and contributes to stable airflow and water management around the sill. The black color facilitates aesthetic integration with the factory BMW finish.

Specifications and technical data

• SKU: 7178017
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7178017
• Substitutable numbers: 51357178017, 7178017, AS
• Location on the vehicle: Rear, Right, Left
• Color: Black
• Offset (ET):
• Category: Door Seals

Vehicle Application and Placement

This seal is specifically designed for the rear body of the BMW F01 series and is mounted on the lower edge of the door. The design is intended for use on both the right and left sides, simplifying part selection for comprehensive bodywork. This placement effectively drains water from the sill area and prevents dirt from entering the interior.

The black color of the material is consistent with factory BMW sealing elements, ensuring that replacing a single seal does not disrupt the visual continuity of the door line. The product comes from the BMW OE line, which guarantees proper fit to the body panel's shape and stable adhesion to the edge.

Technical Function and Benefits of Installation

The lower door seal in a BMW performs several important operational functions:

• prevents water and mud from entering the sill area and interior door components,
• reduces noise generated by airflow and rear wheels,
• supports anti-corrosion protection of the lower body panel edges,
• stabilizes the door closure line, improving user comfort.

By maintaining its original geometry, the seal works in conjunction with other sealing elements, contributing to the maintenance of an appropriate level of acoustic comfort inside the cabin. A correctly selected lower seal also helps to reduce window fogging caused by excessive moisture in the cabin.

Material Characteristics and Color

The seal is made in black, a typical color for factory BMW sealing elements. This color allows for neutral integration into the vehicle's lines, regardless of the exterior paint color. The flexible material structure is designed for repeated door opening and closing cycles while maintaining stable adhesion to the edge.

The black sealing profile effectively masks minor operational dirt, which is particularly important in the sill area exposed to water, salt, and sand. It also maintains compatibility with the factory clips and guides intended for this BMW reference.

Condition and Service Application

The offered seal is a used part, making it an attractive solution for post-accident repairs, replacement due to corrosion, or restoring sealing after door removal. In workshop practice, such a component allows for economical restoration of the sill area while maintaining the original manufacturer's specifications.

Due to its dedicated application for the rear of the vehicle, the seal is suitable for both individual replacement and broader body and paint work involving both sides of the vehicle. Choosing an original BMW seal minimizes the risk of fitment issues common with universal aftermarket parts.

Expanding Service Work Scope

If you are planning comprehensive repair or modernization of the door area in your BMW and need other parts from the same group, such as additional perimeter seals, weatherstripping, or sill profiles, check the available parts in the BMW Door Seals category.

For users interested in a broader approach to maintaining their vehicle in good technical condition, an article describing the impact of engine operating temperature on component durability may also be helpful – find more information in the material Engine Cooling System – Overheating, Repair, and Used Radiators.