Seat Lumbar Support BMW E81 E87 E90 E92 Front Seat Lordosis Pad Pump 7138788

Seat Lumbar Support BMW E81 E87 E90 E92 Front Seat Lordosis Pad Pump is an original component of the backrest adjustment system in front seats, designed for BMW 1 and 3 Series models. Thanks to its precise OEM design, it ensures stable operation of the pneumatic lumbar support, improving spinal support and driving comfort on long journeys. It is a practical solution for drivers who want to restore full seat functionality without the costly replacement of the entire seat, while maintaining factory interior ergonomics.

Specifications and technical data

• SKU: 7138788-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7138788
• Substitutable numbers: 52107138788, 7138788
• 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 part of the vehicle's interior. This component works with the seat control system, enabling:

• precise adjustment of the lumbar support to the driver's or passenger's physique,
• maintaining stable pressure in the cushion while driving,
• increased seating comfort over longer distances,
• restoration of original seat functionality in BMW E81, E87, E90, E92 series.

Its placement in the front seat area allows for easier service access and integration with the existing seat installation and upholstery.

Benefits of using an original seat pump

Using an original component from the Seats and Benches group allows you to maintain the structural consistency of the BMW interior and the proper operation of the adjustment system. In practice, this means:

• proper cooperation with factory backrest adjustment switches,
• appropriate operating parameters of the pneumatic lumbar support system,
• reduced risk of leaks and pressure drops in the cushion,
• a comfortable position behind the wheel, which is particularly important during dynamic driving and daily use.

For users who want to renew the interior of their BMW without investing in new seat sets, using such a component is an economical and functional solution.

Installation and operational characteristics

The lumbar support seat pump is intended for installation in the front part of the cabin, within the seat structure. In practice, this means:

• possibility of integration with the existing wiring and seat adjustment system,
• no need to interfere with the body structure – work is limited to the seat area,
• preservation of the original routing of cables and mounting elements.

The component comes from a used vehicle, which is typical for original BMW interior parts, allowing for the restoration of factory functions without the need to use replacements with uncertain parameters.

Application in BMW interior modernization

When refreshing the cabin of a BMW E81, E87, E90, E92 series, many users decide to install seats with extended adjustment, including lumbar support. A functional pump is crucial in such a case for full utilization of the seat's capabilities. Combined with properly selected seats and upholstery, it allows you to achieve:

• a more comfortable position behind the wheel,
• better back support during daily commutes,
• a consistent, factory look of the interior without interfering with the vehicle's electronics.

If you are planning a broader improvement of the cabin quality, it is also worth considering other interior equipment elements, such as steering wheels or multimedia systems – you will find practical tips in the article Premium interior for half the price: second-hand seats, steering wheels, and multimedia.

Expanding the BMW seat system – related components

If you are planning a comprehensive repair or modernization of the seating area in your BMW and need other components from the same group, such as seat frames, seat cushions, or adjustable backrests, check the available parts in the BMW Seats and Benches category.