BMW i3 I01 Door Brake Stopper Rear Left N/S Check Strap 7400139

BMW F36 Rear Left Door Check Strap 7315927 is an original door mechanism component from the Doors and Door Panels group, designed for installation in the rear left part of the body. This used door check strap provides controlled resistance when opening and closing the door, improving the comfort and predictability of your BMW's door operation.

Specifications and technical data

• SKU: 7400139
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7400139
• Substitutable numbers: 7400139, 51217400139, 7288177, 51227288177, KD
• Location on the vehicle: Rear, Left
• Category: Doors & Door Skins

Component Purpose and Function

The rear left door check strap is responsible for stabilizing the door's position during opening, limiting its uncontrolled swing and protecting the hinges and bodywork from excessive stress. In practice, this means:

• smoother and more predictable door opening,
• increased protection of door edges from impacts,
• reduced wear on hinges and mounting elements,
• improved comfort for the rear passenger area.

Thanks to its precise fit with the BMW F36 body structure, this component works with factory mounting points, maintaining the original door operation characteristics.

Compatibility and Fitment for BMW

The door check strap has been specifically designed for BMW models, ensuring a factory fit with the rear left door structure. Its correct placement on the vehicle eliminates the need for modifications, and the component's geometry aligns with the manufacturer's original design.

The presence of dedicated part numbers and interchangeable numbers allows for unambiguous identification of the component in BMW catalogs and facilitates verification of compatibility with specific body versions. This is particularly important when selecting used door mechanism parts, where precise fit directly impacts durability and operational smoothness.

Characteristics of the Used Component

The offered door check strap is a used part, sourced from disassembly, which allows for combining original BMW specifications with an attractive price compared to new replacements. In practice, this means:

• retention of original geometry and mounting points,
• compliance with factory manufacturer tolerances,
• possibility of cost-effective door mechanism repair.

Choosing a used OEM part is particularly beneficial where both correct operation and control of vehicle operating costs are important.

Benefits of Installing the BMW F36 Door Check Strap

The installation of the correct door check strap in the rear left part of the body affects the vehicle's daily operation in several areas:

• Passenger Comfort – doors open with noticeable resistance, do not "jump" suddenly, and are easier to hold in the desired position.
• Body Protection – limiting excessive door swing reduces the risk of damage to door edges and adjacent body panels.
• Stable Mechanism Operation – a correctly selected check strap relieves stress on hinges and locks, contributing to their longer lifespan.

This solution is particularly recommended for repairs after collisions, door replacements, or refurbishment of mechanisms in the rear cabin area.

Repair Extension and Cost Optimization

If you are planning a comprehensive repair or upgrade of the door area in your BMW and need other parts from the same group, such as reinforcements, hinges, or complete doors, check the available parts in the BMW Doors and Door Panels category.

For more extensive work, it is also worth analyzing your parts selection strategy in terms of budget and durability. Practical tips on when it is worthwhile to opt for used OEM components can be found in the article Rising Repair Costs vs. the Boom in Used Parts – How to Save on Car Service?, which will help you plan your car's service consciously.