1634600249 Mercedes-Benz W163 Molla spirale clock spring cavo airbag volante originale usato e collaudato

Descrizione

Riferimento originale 1634600249. Un originale usato, collaudato Mercedes-Benz W163 ML-Class clock spring spiral cable — the rotary coupler carrying airbag, horn, and switch signals across the rotating steering interface.

The spiral cable — also referred to as a clock spring, squib, or rotary coupler — consists of a precision coiled ribbon connector inside a moulded plastic carrier, positioned at the steering column and wheel hub interface. The ribbon accommodates the full range of steering wheel rotation without breaking any electrical path, supplying power and signals to the driver airbag pyrotechnic squib, the horn, and every control integrated into the steering wheel (cruise, media, telephone, paddle shifters). Its direct role in the airbag firing circuit makes it safety-critical.

Horn failure or intermittent horn operation; driver airbag or SRS fault light on the dashboard — the most urgent sign, pointing to a broken airbag circuit that may prevent deployment; steering wheel-mounted audio, phone, cruise and paddle-shift controls all becoming unresponsive; a clicking or grinding sensation when the wheel is turned to full lock; or apparent damage to the ribbon conductor itself.

Safety-critical part. Professional installation is required — the airbag pyrotechnic circuit passes through this unit and incorrect installation can prevent the driver airbag from deploying in a collision. After fitting, all SRS fault codes must be cleared using appropriate diagnostic equipment. Verify the OEM number against your exact vehicle before ordering. 14-day returns accepted on unmodified parts.