Smart ForFour EV Airbag Warning Light Issue Solved

Having some experience with electric vehicles, I faced a similar issue with my 2018 Smart ForTwo EV last year. The restraint system warning light also came on unexpectedly, causing concern about the vehicle safety systems. After a diagnostic scan, it turned out to be a loose plug connection in the airbag wiring harness under the driver seat. The repair was relatively straightforward, the workshop cleaned and reseated the connections, then reset the airbag system. Total cost was 95€ for diagnosis and repair. The good news is that these issues are often connection-related rather than problems with the actual airbag deployment mechanism. However, since this involves critical safety components, its important to have it checked professionally rather than attempting DIY fixes. To better assist you, could you share: Have you had any recent work done near the seats or center console? Does the warning light ever go off, or is it constant? Have you checked if your specific vehicle is affected by any airbag recall notices? Until repaired, I would suggest having this looked at soon, as a malfunctioning airbag system could affect proper deployment in case of an accident.

Last service was at 182000 KM and currently showing 184825 KM on the odometer. Thanks for the detailed insights about the airbag sensor issue. Since posting, the crash sensor warning has become intermittent, sometimes disappearing for short drives but returning again. No recent work was done near the seats or console area. I checked the automotive safety recall database and found no open recalls for the restraint system on my specific model. I called a workshop and scheduled a diagnostic check for next week. They mentioned similar cases where the airbag repair involved just cleaning or reseating connectors, which sounds promising given your experience. Will update once I know more about the actual cause.

Thanks for the mileage details. The intermittent nature of your SRS light actually strengthens the likelihood of a connection issue, similar to what I experienced. When the airbag sensor warning comes and goes, its often related to loose or corroded wiring connections rather than a complete crash sensor failure. My Smart ForTwo showed the same symptoms, the warning would disappear on smooth roads but return on bumpy sections. The workshop found that road vibrations were affecting a partially loose connector under the seat. Since youre approaching the 185000 KM mark, its also worth having them check the entire airbag system wiring harness during diagnostics. In my case, they discovered some wire insulation was starting to crack near connection points due to age and movement. The car safety systems are designed with redundancy, but any restraint system fault should be addressed promptly. When the workshop handles your vehicle, ask them to document the diagnostic codes for future reference, this helped me track that the fix was permanent. Looking forward to hearing what they find during your diagnostic appointment next week. Keep us posted about the repair outcome.

Given your repair experience with the vehicle safety system and airbag sensor warnings, I want to update the forum on what the workshop found during my diagnostic appointment. The SRS light issue turned out to be exactly as many here suggested, a faulty wiring connection under the passenger seat. The total repair cost was 120€, which included cleaning corrosion from the restraint system connectors and updating the airbag control module software. The technician showed me where the wire insulation had worn through from seat movement, causing intermittent connection issues with the crash sensor. They also performed a full system check to ensure no other airbag deployment components were affected. For anyone encountering similar problems, the workshop confirmed this is a known issue around the 180000 KM mark. They recommended periodic inspection of the wiring harness connections during regular service intervals. Really appreciate all the helpful responses that helped me understand the problem before the repair visit. The car has now done 500 KM since the fix with no warning lights returning.