BMW E81 E87 E90 E91 Front Seat Lordosis Pad Lumbar Pump Control Unit 7138787

The BMW E81 E87 E90 E91 Front Seat Lordosis Pad Lumbar Pump Control Unit is a specialized control module for the front seat lumbar support pad, designed for select BMW models. This component is responsible for the precise operation of the lumbar support pump, which directly impacts seating comfort and ergonomics while driving.

Specifications and technical data

• SKU: 7138787-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7138787
• Substitutable numbers: 52107138787, 7138787
• Location on the vehicle: Front
• Category: Seats and Sofas

Purpose and Function within the Seat System

The presented control unit is part of the lumbar support adjustment system in the front seat. It is responsible for controlling the pump's operation and regulating the pressure in the lumbar pad, allowing the driver and passenger to adjust the backrest shape to their needs. A properly functioning module ensures stable support for the lumbar spine, reducing fatigue on longer journeys.

As a component from the Seats and benches group, the module works with the vehicle's electrical system and seat adjustment buttons, creating a cohesive seating comfort system within the BMW cabin.

Construction and Integration with BMW Systems

The lumbar pump control unit is designed for factory BMW connectors and wiring harnesses, facilitating installation in dedicated models. The module's housing is compact, adapted for operation within the front seat space, considering typical operational loads in this area (vibrations, temperature changes, movement of adjustable elements).

This component works with the factory seat adjustment switches and the pneumatic system of the lumbar pad, ensuring consistent operation of the entire seating comfort system.

Vehicle Placement and Application

The module is intended for installation in the front interior, within the seat area, according to the manufacturer's original design. Its location allows for short routing of electrical and pneumatic lines, which reduces pressure loss and improves the responsiveness of the lumbar support system.

This solution is particularly important in vehicles used for long distances, where stable back support translates to higher driving comfort and better driver concentration.

Product Characteristics and Condition

The offered control module comes from the original BMW system, which promotes full compatibility with the electrical system and other seat components. The product is in used condition, meaning it has been previously operated in a vehicle but can still perform its function as a replacement for a damaged part in your car.

This type of solution is cost-effective compared to new components, while also allowing for the maintenance of seating comfort system consistency within the BMW interior, without the need for non-factory modifications.

Interior Comfort and Equipment Expansion

A functional lumbar support control module provides real support for the driver and passenger, especially in premium-class cars where extensive seat adjustment is expected. Combined with other seat and backrest adjustment functions, it allows for the creation of a comfortable, ergonomic driving position.

If you plan to broadly modernize your cabin, consider replacing seats, steering wheels, or multimedia components. You can find practical tips in the article Premium Interior for Half the Price: Used Seats, Steering Wheels, and Multimedia, which discusses the selection, installation, and compatibility of used equipment.

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