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 lumbar support system component designed for installation in the front seats of selected BMW 1 and 3 Series models. By using this pump, it is possible to precisely control the lumbar cushion, which translates into stable spinal support and significantly higher driving comfort, especially on longer journeys. This is a practical solution for drivers who want to restore full seat functionality without investing in a complete new seat.

Specifications and technical data

• SKU: 7138788-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7138788
• Substitutable numbers: 52107138788, 7138788, BG
• Location on the vehicle: Front
• Category: Seats and Sofas

Purpose and function in the seat system

The presented pump is a component of the lumbar support adjustment system in the front seat, belonging to the Seats and Benches category. It is responsible for generating and maintaining the appropriate pressure in the lumbar cushion, which allows for:

• adjusting the shape of the backrest to the driver's or passenger's physique,
• reducing the load on the lumbar spine,
• improving back stabilization during dynamic driving,
• increasing overall seating comfort in daily use.

Thanks to the proper operation of the pump, the seat maintains its ergonomics, and the lumbar support adjustment remains smooth and repeatable.

Compatibility with BMW models

Seat Lumbar Support BMW E81 E87 E90 E92 Front Seat Lordosis Pad Pump has been designed for factory front seats in popular BMW 1 Series (E81, E87) and 3 Series (E90, E92) models. Using an original solution from the same family of components allows you to maintain:

• structural consistency of the seat system,
• proper fit to the seat installation and upholstery,
• correct cooperation with existing adjustment elements.

This is particularly important for vehicles where we want to maintain factory ergonomics and seat characteristics without interfering with the seat structure.

Characteristics of the used component

The offered pump comes from dismantling and is an original BMW part, which means maintaining factory operating parameters and compatibility with the seat system. The used component is a reasonable choice for drivers who want to:

• restore the efficiency of the lumbar support in the seat,
• maintain the original interior equipment specification,
• optimize repair costs compared to purchasing a new part.

A properly selected pump allows for quick resolution of problems with non-functioning or unstable lumbar cushion adjustment, without the need to replace the entire seat.

Benefits of using the original lumbar cushion pump

Using a dedicated pump in the BMW front seat translates into a number of practical utility benefits:

• Ergonomic back support – the ability to precisely adjust the backrest to the driver's individual preferences.
• Higher comfort on long journeys – reduction of fatigue and muscle tension in the lumbar region.
• Consistency with factory equipment – no need for seat installation modifications.
• Reasonable cost of restoring functionality – replacing a single component instead of the entire seat.

This solution is particularly recommended for cars where seating comfort is of key importance, and the owner wants to maintain the original character of the interior.

Expansion and modernization of the BMW seating 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 complete seats, check the available parts in the BMW Seats and Benches category.

If you want to better understand how replacing seats or their equipment elements affects driving comfort and the perceived value of the car, check out the guide on our blog: Interior metamorphosis: how branded seats from dismantling improve comfort and car value.