BMW E87 E90 E91 Front Seat Lordosis Pad Lumbar Bag Back Support Pump Set 7140555

BMW E87 E90 E91 Front Seat Lordosis Pad Lumbar Bag Back Support Pump Set is an original front seat lumbar support set designed for BMW 1 Series E87 and 3 Series E90/E91 models. The set provides precise adjustment of the lumbar support, improving seating ergonomics and driving comfort on long journeys. Thanks to its OEM factory design, it serves as a cohesive element of the seating system, maintaining the build quality characteristic of BMW.

Specifications and technical data

• SKU: 7140555-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7140555
• Substitutable numbers: 52107140555, 7140555, 52107404139, 7404139, 52107398497, 7398497, 52107153091, 7153091, 52107141089, 7141089, 52107141090, 7141090, 52107392151, 7392151, EM
• Location on the vehicle: Front
• Category: Seats and Sofas

Purpose and function in the front seat

The presented lumbar support set is a component mounted in the BMW front seat, responsible for shaping the backrest profile in the lumbar spine area. The system includes a lumbar bag and a pump unit, which work with the seat's electrical system, allowing for the adjustment of the support's firmness and extension.

This solution allows the driver or passenger to adjust the backrest to their individual driving position, which reduces back muscle fatigue and improves torso stabilization while driving. Using an original set is particularly important in vehicles used intensively, where seating comfort directly affects concentration and safety.

Construction of the lumbar support set

The BMW front seat lordosis set is designed as a complete kit of cooperating elements, which facilitates its integration with the existing seat structure. The bag and pump system forms a closed circuit that, once properly connected to the seat's wiring, allows for smooth adjustment of the support.

The original BMW design ensures proper fitment to the seat frame and upholstery, without the need to interfere with the seat structure. As a result, the installation process is orderly, and the component remains invisible to the user after installation, working in the background as functional interior equipment.

Benefits of using the original lumbar support

Using a factory lumbar support set in a BMW front seat offers a number of practical benefits:

• Improved ergonomics – the ability to adjust the backrest shape to the driver's or passenger's physique.
• Better support for the lumbar spine, which reduces strain during long drives.
• Consistency with the factory seat design, without compromises in terms of fitment and mechanism operation.
• Maintaining the character of the BMW interior, without the use of universal, external overlays or cushions.

For users who experience discomfort in the lower back, a fully functional lumbar support system is one of the key elements affecting the subjective perception of interior quality and driving comfort.

Condition, application, and installation aspects

The offered component comes from the Seats and benches group and is intended for installation in the front part of the cabin. As a used part, the set is a good choice for users looking for a solution that allows restoring the lordosis adjustment function on a reasonable budget, while maintaining the original BMW specification.

Before installation, it is recommended to verify compatibility with the specific seat version and the equipment configuration of the given vehicle. In practice, this most often means comparing the used lumbar support system with the part removed from the car and checking the routing of cables and mounts in the seat frame.

Compatibility and selection of parts for BMW

The component has been designed for integration with factory front seats of the BMW 1 Series E87 and 3 Series E90/E91, in configurations provided by the manufacturer for the lordosis adjustment system. Thanks to this, the user retains the full functionality of the original equipment, without the need to adapt universal solutions.

If you are planning a comprehensive repair or upgrade of the seating area in your BMW and need other elements from the same group, such as frames, adjustment mechanisms, or complete seats, check the available parts in the BMW Seats and benches category.

For those who want to plan their interior refresh more broadly, practical tips regarding the selection of used equipment components, their installation, and cost optimization may be useful – you can find them in the article Premium interior for half the price: second-hand seats, steering wheels, and multimedia.