BMW E81 E84 E87 E90 E91 Airbag Clock Spring is an item from the Steering Wheels and Horn Buttons category, designed for the airbag and steering wheel control system in selected BMW 1 and 3 Series models. This clock spring enables the safe transfer of electrical signals between the steering column and the airbag and buttons, while maintaining full steering wheel mobility. It is a practical solution for users who want to restore the correct functionality of the airbag and horn after the original component has failed.
Specifications and technical data
- SKU: 6989557
- Mark: BMW (Genuine OE)
- Condition: Used
- OEM Part Number: 6989557
- Substitutable numbers: 61319122509, 9122509, 61316928042, 6928042, 61316989557, 6989557
- Category: Steering Wheels & Horn Buttons
Purpose and Function of the Clock Spring
The airbag clock spring in BMW E81, E84, E87, E90, and E91 models is responsible for a stable electrical connection between the fixed wiring harness and the moving steering wheel. Thanks to its appropriate design, it ensures:
- signal transmission to the driver’s airbag,
- operation of the horn buttons on the steering wheel,
- operation within the full range of steering wheel rotation without the risk of wire breakage.
A properly selected clock spring is crucial for maintaining the functionality of the safety system and convenient operation of the horn from the steering wheel.
Compatibility and Identification by Numbers
The offered clock spring is an original BMW part, assigned to specific equipment versions and vehicle generations. Part selection is based on the manufacturer’s part number and available replacement numbers, which facilitates matching to a specific car instance. In practice, this means that with correct verification by numbers, this clock spring can be safely used as a replacement for a damaged component in a given BMW model.
This solution provides the user with the assurance that the airbag and horn button system will work with the existing wiring harness and control modules in the vehicle.
Condition, Origin, and Advantages of Using a Used Part
The presented clock spring comes from the used BMW parts segment. This type of component, sourced from dismantling, allows for economical repair of the steering system while maintaining the original manufacturer’s specifications. Compared to many low-quality aftermarket replacements, an original clock spring ensures proper fit with the steering column and compatibility with factory connectors.
Using a used OEM part is particularly beneficial when you want to maintain the vehicle’s factory configuration, without interfering with the electrical system and without the need for modifications to wiring or connectors.
Role in the Steering and Safety System
The airbag clock spring is one of the key components within the steering wheel, affecting both safety and user comfort. Its proper functioning directly impacts:
- the readiness of the driver’s airbag to deploy in case of a collision,
- uninterrupted operation of the horn buttons,
- the absence of airbag system errors on the dashboard.
Replacing a damaged clock spring with a functional part is a standard service procedure in case of errors related to the driver’s airbag circuit or a non-functioning horn.
