BMW E87 E90 Front Seat Lordosis Lumbar Support Pump Motor Control Unit 7138786

BMW E87 E90 Front Seat Lordosis Lumbar Support Pump Motor Control Unit is an original part from the Seats and benches category, designed for installation in the front interior of BMW vehicles. It enables precise power supply and adjustment of the lumbar support, improving seat ergonomics and driving comfort on long journeys. This solution is particularly valued for interior upgrades and restoring the factory functionality of the driver or passenger seat.

Specifications and technical data

• SKU: 7138786-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7138786
• Substitutable numbers: 52107138786, 7138786, KZ
• Location on the vehicle: Front
• Category: Seats and Sofas

Purpose and function in the seat system

The seat pump is responsible for powering and adjusting the lumbar support in the front seat, which allows for customizing spinal support to the individual needs of the driver or passenger. The component works with the seat adjustment system, ensuring stable and repeatable operation of the lumbar mechanism. This makes it possible to achieve a more comfortable position behind the wheel, which is important both in daily use and in fleet applications.

Compatibility with BMW E87 and E90

The presented pump has been designed for front seats in popular BMW 1 Series E87 and 3 Series E90 models. This ensures the correct mounting geometry, appropriate connectors, and a perfect fit for the factory seat control system. Using an original solution from the same model group minimizes the risk of installation issues and allows for maintaining the consistency of the entire seat adjustment system.

Technical characteristics and installation

The lumbar support seat pump operates in the front zone of the cabin, in the immediate vicinity of the seat structure. It is adapted to work with factory wiring and control elements, which facilitates integration with the existing installation. Installation involves mechanical mounting in the designated place and connecting it to the seat system, without the need to interfere with other vehicle systems.

Due to its origin from the original BMW production line, compatibility with the factory operating parameters of the lumbar system is maintained. This solution is suitable both for replacing a damaged component and for expanding interior equipment with lumbar adjustment in a seat that did not previously have it (provided the seat structure and vehicle installation allow for it).

Condition, origin, and practical application

The item comes from disassembly and is offered as a used OEM BMW component, which allows for combining reasonable cost with maintaining the manufacturer's original specifications. This type of solution is particularly attractive for post-accident repairs, interior restoration, or restoring full functionality to seats in vehicles used intensively (e.g., in companies, fleets, service vehicles).

Using an original lumbar support seat pump reduces the risk of improper system operation, leaks, or fitment problems. It is a practical choice for users who expect consistency with the factory BMW standard and want to keep the vehicle interior as close to the original configuration as possible.

Integration with interior tuning and modernization

For projects related to improving ergonomics and seating comfort, the lumbar support seat pump is an important element of the entire seat system. It can be used both when replacing seats with higher-spec versions and when reconstructing equipment after changing upholstery or upgrading the interior. If you want to better understand how to use used seats and control elements to improve driving comfort, it is worth reading the article Car interior tuning with Global Parts, which describes a practical approach to cabin modernization using second-hand components.

Expanding the BMW seat system

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