Smart Fortwo C451 Rear Tailgate Boot Lid Trunk Seal Gasket Rubber A4517420198

Smart Fortwo C451 Rear Tailgate Boot Lid Trunk Seal Gasket Rubber is a precisely fitted body component responsible for the sealing of the rear part of the vehicle. A properly selected tailgate seal limits the ingress of water, dust, and noise into the interior, improving daily driving comfort. Choosing an original seal from the Door seals group allows you to maintain factory body parameters and the aesthetics of the tailgate.

Specifications and technical data

• SKU: A4517420198
• Mark: Smart
• Condition: Used
• OEM Part Number: A4517420198
• Substitutable numbers: A4517420198, A 451 742 01 98
• Location on the vehicle: Rear
• Part type: Door Seal
• Category: Door Seals

Purpose and function in the vehicle

The presented seal is designed for installation in the rear part of the body, around the tailgate of the Smart Fortwo C451 model. The component operates in the critical contact area between the tailgate and the bodywork, where it is responsible for:

• limiting the ingress of rainwater into the luggage compartment,
• reducing noise and vibrations transmitted from the outside,
• stable guidance of the tailgate during closing,
• protecting metal edges against accelerated corrosion. Thanks to its proper profile and fit for the specific Smart model, the seal works with factory mounting points, which facilitates installation and ensures consistent sealing after the tailgate is closed.

Benefits of using an original seal

Using a dedicated tailgate seal in the Smart Fortwo C451 allows you to maintain body parameters close to factory specifications. Key advantages include:

• Better protection of the luggage compartment interior – reducing the risk of moisture affecting upholstery, electrical wiring, and equipment components.
• Stable tailgate closing – correct resistance when closing, without excessive play or excessive pressure.
• Consistency with the body structure – profile and geometry matched to the specific Fortwo C451 generation.
• The ability to restore sealing after a collision, body repair, or natural wear of the old seal.

Installation characteristics

The tailgate seal in the Smart Fortwo C451 is a component operating in the rear area of the vehicle, which requires correct positioning along the perimeter of the luggage compartment opening. When replacing, it is worth paying attention to:

• cleaning the contact surface from remnants of the old seal and dirt,
• correct routing of the profile along the entire perimeter, without twists or kinks,
• checking the tailgate closing after installation – even pressure along the entire length. A properly installed seal improves acoustic comfort and limits air drafts, which is particularly noticeable at higher speeds.

Application in the Smart body system

The component belongs to the Door seals group, however, in this case, it operates in the rear tailgate zone, creating a barrier between the interior and the external environment. In combination with other body seals, it allows maintaining:

• a consistent level of cabin sealing,
• an aesthetic appearance of the tailgate edges,
• proper operation of the lock and hinges by limiting the ingress of contaminants. For Smart Fortwo C451 users who experience increased noise from the rear, exhaust odors in the cabin, or notice traces of moisture in the trunk, replacing the tailgate seal is one of the basic diagnostic steps.

Modernization expansion and additional materials

If you are planning a comprehensive repair or modernization of the rear body zone in your Smart and need other components from the same group, such as additional edge seals, door profiles, or rebate seals, check the available parts in the Smart door seals category. For a comparison of design solutions used in various brands and segments, including sports versions, you can familiarize yourself with the analysis of engine, brake, and chassis construction in the article Audi RS vs other models – what is hidden under the hood and chassis?, which shows how manufacturers design key components for durability and performance.