BMW E87 E90 Front Driver's Seat Backrest Adjustment Engine Actuator

The BMW E87 E90 Seat Backrest Motor is an original front seat backrest adjustment component designed for BMW 1 Series E87 and 3 Series E90 models. It provides precise drive for the backrest mechanism, ensuring comfortable and repeatable adjustment of the driver's or passenger's seating position. This is a practical solution for users looking to restore full seat functionality after the failure of the factory drive unit.

Specifications and technical data

• SKU: 6973599
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6973599
• Substitutable numbers: 67316973599, 6973599
• Location on the vehicle: Front
• Category: Other Interior Parts & Accessories

Purpose and Function in the Seat System

The backrest motor is responsible for driving the gearbox that adjusts the backrest angle of the front seat. In BMW E87 and E90 vehicles, it is part of the electric seat adjustment system, working in conjunction with the control unit and the seat frame mechanics. Thanks to it, smooth adjustment of the backrest within the manufacturer's specified range is possible, without play or jerking.

Its placement in the front of the vehicle means this component operates in one of the front seats, where operational loads are highest. A functional motor contributes to:

• stable maintenance of the selected backrest angle while driving,
• a comfortable position behind the steering wheel or in the passenger seat,
• proper cooperation with other seat construction elements.

Compatibility and Part Identification

The offered front seat backrest motor is a part from the BMW group, which facilitates matching to specific equipment configurations in the E87 and E90 series. Identification is based on the OEM part number and available replacement numbers, which allow verification of compliance with the vehicle's factory documentation. In practice, this means the possibility of directly replacing a damaged drive unit with a component having the same mounting and electrical parameters.

For user convenience, it is crucial to compare data such as:

• manufacturer markings on the motor housing,
• type of electrical connector,
• mounting type to the seat frame and backrest gearbox.

Performance Characteristics and Installation

The front seat backrest motor is a component that operates cyclically but in short time intervals, requiring appropriate resistance to momentary loads. The design provided by BMW ensures:

• stable operation under typical vehicle interior operating conditions,
• cooperation with the factory electric seat control,
• possibility of installation in place of the original drive unit without structural modifications.

When replacing, it is recommended to follow the seat disassembly sequence according to BMW service procedures, especially regarding the disconnection of the electrical system and any airbags. A correctly installed motor ensures repeatable backrest adjustment and proper torque transfer to the adjustment mechanism.

Condition and Benefits of Using a Used Part

The offered component comes from the group of used BMW parts, allowing for economical repair of the seat adjustment system while maintaining the original manufacturer's specifications. Compared to low-quality aftermarket parts, using an OEM component from disassembly often means better mechanical fit and correct operating parameters within the vehicle's electrical system.

Choosing this solution is particularly beneficial when you want to:

• maintain the interior equipment's consistency with the factory configuration,
• limit repair costs while preserving the original seat construction,
• maintain proper cooperation with the existing electric control.

If you are looking for other interior equipment and seat mechanism related parts for this brand, check the available parts in the Other BMW category.

Technical Support and Additional Materials

When planning repairs to BMW seat systems, it is useful to know the structural differences between individual model lines and equipment versions, especially concerning engines, brakes, and chassis in higher-class cars. For a better understanding of the design philosophy of sports and performance car manufacturers, an article comparing technical solutions in different Audi models may be helpful – you can find it here: Audi RS vs. Other Models – What's Under the Hood and Chassis?.

If you are also interested in other areas of tuning and modernization, including exhaust systems in premium cars, practical tips for selecting used components can be found in the guide: Performance Exhaust Systems: Used Headers and Sport Catalytic Converters on the Road.