Mini F60 Countryman Joint Seal B Pillar Trim Left N/S Rear Door Cover 7390135

Visual condition of the part 

The product shows signs of use visible in the photos. 

Mini F60 Countryman Joint Seal B Pillar Trim Left N/S Rear Door Cover is a precisely fitted component from the Doors and door panels group, designed for the rear left section of the vehicle body. It is responsible for a tight connection in the B-pillar area, limiting the ingress of water, noise, and contaminants into the vehicle interior. This is a practical solution for users who want to restore proper acoustic insulation and functionality to the side door zone.

Specifications and technical data

• SKU: 7390135
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 7390135
• Substitutable numbers: 51767390135, 7390135
• Location on the vehicle: Rear, Left
• Category: Doors & Door Skins

Purpose and function of the seal

The described seal is a component mounted in the area of the rear left B-pillar, where it operates in direct proximity to the door. Its task is to:

• seal the gap between the body structure and the door leaf,
• reduce the penetration of external noise into the cabin,
• stabilize door operation through proper pressure in the contact zone,
• protect against moisture and fine contaminants in a critical area of the body.

Thanks to its proper profile and fit to the geometry of the B-pillar in the Mini Countryman F60, the seal helps maintain the factory comfort of the vehicle and the correct operation of the door locking mechanism.

Advantages of using an original Mini component

The B-pillar gap seal, as a Mini brand component, ensures compliance with the factory vehicle specification. This means:

• appropriate shape and flexibility matched to the body structure,
• proper adhesion across the entire contact area with the door,
• compatibility with factory mounting points,
• visual consistency with other seals within the bodywork.

Using an original component from the Doors and door panels group helps avoid fitment issues that often occur with aftermarket parts featuring a universal profile.

Vehicle placement and installation aspects

The seal is designed for installation in the rear left part of the body, in the B-pillar area. This placement requires maintaining the correct sequence of disassembly and assembly of the door and pillar trim elements to avoid creating tension and leaks.

When replacing, it is worth paying attention to:

• cleaning the contact surface from old seal residues and contaminants,
• checking the condition of the sheet metal edges in the contact zone,
• even seating of the seal along its entire length, without twists or kinks,
• checking door operation after installation – closing, pressure, and lack of rubbing.

A correctly installed seal supports door stability and maintains proper pressure in the pillar area, which translates into acoustic comfort and cabin tightness.

Characteristics of the used component

The presented component comes from the secondary market, which allows for economical repair while maintaining the manufacturer's original specification. A used element from the Mini range is a solution that combines controlled wear with the preservation of the correct profile and installation compatibility.

Choosing such a seal is particularly beneficial in the case of post-accident repairs or restoring full door functionality after bodywork and painting interventions, where matching the factory body geometry is crucial.

Integration with other door components

The B-pillar gap seal works with other seals and components from the Doors and door panels group, creating a coherent system for protecting the cabin from external factors. In the case of extensive work on the side of the body, it is worth considering checking the condition of other seals and sheet metal elements in this area to avoid localized leaks and unwanted noises while driving.

If you are planning a comprehensive repair or upgrade of the side zone in your Mini and need other elements from the same group, such as panels, reinforcements, or additional sealing profiles, check the available parts in the Mini Doors and door panels category.

To compare manufacturers' approaches to the quality of body components and the benefits of choosing original parts from the secondary market, it is worth reading the article Mercedes – comfort, prestige, and durability. Why is it worth choosing original used parts?, which discusses the practical aspects of operating and servicing vehicles using original used parts.