Second Hand Alfa Romeo 4C Airbag Control Module

Yes, the Alfa Romeo 4C is fitted with a Supplemental Restraint System (SRS) including front airbags and an airbag control module (ACM), also known as the SRS ECU or crash sensor module, which manages deployment. Despite the 4C's stripped-back, lightweight ethos, airbag safety systems were retained as standard. If you are looking for a used unit, a breaker who specialises in Alfa Romeo or Italian sports cars is your best starting point.

The Alfa Romeo 4C ran in a single generation from 2013 to 2020, with a mild refresh around 2016 that brought some exterior and interior updates; whether the ACM is interchangeable across that refresh boundary is not something that can be confirmed here, so you should check the part number on your existing module against what the breaker has and ask them to cross-reference it against your registration. The 4C is a low-volume, specialist model and SRS system variants can be specific, so this confirmation step is important. Never assume fitment without a direct part-number match on a safety-critical component like this.

The Alfa Romeo 4C was offered in standard and Launch Edition guises, and later the 4C Spider alongside the coupe, but the airbag control module itself is an electronic unit that sits independently of trim-level seat or interior differences. Trim level is unlikely to be the deciding factor for ACM compatibility, though you should still confirm with the breaker against your registration that the SRS system variant matches, as this cannot be stated as fact here. Focus instead on confirming the model year and body style (coupe or Spider) when requesting a quote.

The 4C coupe and 4C Spider are structurally different body styles, and it is possible the SRS system configuration differs between them, which could affect ACM compatibility. This is one of those details that cannot be confirmed as fact here, so you should tell the breaker specifically whether your car is the coupe or Spider and ask them to verify the part number against your registration before purchasing. Because the 4C Spider was produced in smaller numbers, sourcing a like-for-like unit may take more time.

The airbag control module is a safety-critical component and professional fitting by a qualified technician is strongly recommended — incorrect installation or coding can prevent the SRS system from functioning in a crash. The ACM will typically also need to be reset or coded to your vehicle after fitting, which requires specialist diagnostic equipment. A breaker can often advise whether the unit they supply has been cleared, but coding to your car should always be carried out by a professional.

Give the breaker your full registration number so they can confirm the exact SRS system fitted to your car, along with the model year and whether your 4C is the coupe or Spider body style. It is also worth noting the part number printed on your existing ACU if it is accessible, as this gives the breaker the most direct route to finding a compatible unit. Because airbag modules are single-use after deployment, always ask the breaker to confirm the unit has not been triggered.