BMW 1 3 Series E81 E87 E90 E91 Front Seat Lordosis Pad Lumbar Support Pump

BMW 1 3 Series E81 E87 E90 E91 Front Seat Lordosis Pad Lumbar Support Pump is a specialized component of the lumbar support system, designed for installation in BMW front seats. Thanks to precise pressure control in the support chambers, it allows for a more comfortable adjustment of the backrest to the driver's and passenger's silhouette, which improves ergonomics during daily use and longer journeys. This solution is particularly valued by users who expect stable, adjustable lumbar support from their seat and consistency with the factory BMW installation.

Specifications and technical data

• SKU: 7138787
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7138787
• Substitutable numbers: 52107138787, 7138787, 7140555, 4072740
• 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 adjustment system in front seats of the BMW 1 and 3 series model groups. It is responsible for pumping and maintaining pressure in the lumbar cushions, which allows for smooth changes to the backrest shape. In practice, this translates into:

• more stable support for the lower back,
• reduced spinal fatigue during long drives,
• precise adjustment of the seat to individual user preferences.

As an element from the Seats and sofas group, it works with the seat's electrical and pneumatic system, ensuring consistent operation with factory controllers and adjustment buttons.

Construction and fitment for BMW

The pump has been designed as part of the original BMW lumbar support system, which means that its construction, connectors, and mounting method are adapted to the factory solutions used in front seats. Thanks to this:

• compatibility with the factory seat wiring harness is maintained,
• installation does not require structural modifications to the backrest,
• the lumbar system retains the original functionality intended by the manufacturer.

The original origin from the BMW brand promotes proper fitment with other seat components and minimizes the risk of system integration issues.

Performance characteristics and installation benefits

Replacing a faulty lumbar support pump with a functional unit allows for the restoration of full backrest adjustment functionality. From the user's point of view, this means:

• the ability to use adjustable lumbar support again,
• a more comfortable position behind the wheel, especially during intensive vehicle use,
• maintaining the consistency of the interior equipment with the factory BMW specification.

The item in used condition is an attractive cost-effective alternative to new components, while maintaining the original design and purpose. This is a solution often chosen for seat repairs in cars used on a daily basis, where a reasonable balance between cost and functionality is important.

Application in the front seat area

Placement in the front seat area means that the pump has a direct impact on the comfort of the driver and the front passenger. A properly functioning lumbar system is particularly important in cars used for:

• long commutes to work,
• highway travel,
• intensive fleet use.

Restoring the efficiency of the lumbar support system can also be an argument when reselling the vehicle, as complete, working seat equipment is perceived as an asset that increases the car's attractiveness.

Expansion and modernization of the BMW seating area

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 backrests, check the available parts in the BMW Seats and sofas category.

To better plan your interior modernization and choose the right seat components, it is worth reading the guide describing the impact of branded seats on comfort and car value – details can be found in the article Interior metamorphosis: how branded seats from dismantling improve comfort and increase the value of the car.