BMW 3 Series E31 E34 E36 E38 Fuel Tank Filler Cap Cover 1184718

BMW 3 Series E31 E34 E36 E38 Fuel Tank Filler Cap Cover is an original component from the Fuel filler caps and accessories group, designed for BMW E31, E34, E36, and E38 series models. This used OEM component ensures proper closure of the filler neck, a stable seal, and safe operation of the vehicle's fuel system.

Specifications and technical data

• SKU: 1184718
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 1184718
• Substitutable numbers: 16111184718, 1184718, KZ
• Category: Fuel Flaps & Components

Purpose and technical function

The fuel tank filler cap in these BMW generations is responsible for tightly sealing the filler neck, which limits fuel evaporation and protects the tank from external contaminants. A properly selected component of this type supports the correct operation of the fuel system and minimizes the risk of moisture and dirt entering the installation.

Using an original fuel tank filler cap is particularly important in vehicles where maintaining factory performance parameters and compatibility with the bodywork and filler flap design is essential.

Compatibility with BMW models

The presented cap has been designed for selected BMW models from the E31, E34, E36, and E38 series. This means it fits the factory fuel filler neck, features the correct sealing geometry, and complies with the closing mechanism provided by the manufacturer.

To ensure compatibility with a specific engine version and model year, it is worth verifying the markings in the vehicle documentation or comparing the design with the currently installed part. This ensures that the replacement process is smooth and that the cap operates in a predictable and consistent manner after installation.

Performance characteristics and installation

As a used part, the BMW fuel tank filler cap retains the factory design and operation method intended by the manufacturer. This includes:

• secure closing and opening of the fuel filler,
• properly selected diameter and shape of the sealing surface,
• compatibility with the stock filler flap and housing.

Installation of the component is generally straightforward and can be performed during standard fuel system maintenance or during a bodywork inspection. Replacing a worn cap with an original component helps restore proper filler closure and the aesthetic appearance of the refueling area.

Benefits of using an original BMW cap

Using an original fuel tank filler cap in BMW E31, E34, E36, and E38 models provides a number of practical benefits:

• Factory fitment – the cap works with the filler neck and flap according to the manufacturer's design, without the need for modifications.
• Stable sealing – the correct geometry of the contact surfaces limits the ingress of contaminants into the fuel system.
• Consistency with original equipment – maintaining a uniform standard of parts throughout the vehicle facilitates future maintenance.

For workshops and users who value the predictability of the fuel system, choosing an original cap is a safe and technically sound solution.

Expanding fuel filler area maintenance

If you are planning a comprehensive repair or upgrade of the fuel filler area in your BMW and need other elements from the same group, such as additional caps, accessory security features, or mounting elements, check the available parts in the BMW fuel filler caps and accessories category.

To better understand the impact of the fuel filler cap's condition on the operation of the entire system, it is worth reading the guide on diagnostics and maintenance of the fuel installation: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

For users and workshops interested in optimizing repair time and utilizing original components from the secondary market, the material describing the impact of the availability of used OEM parts on the service process may also be useful: how used OEM parts shorten a car's stay in the workshop.