Safety features on the Volvo S40 are numerous. The S40 is equipped with anti-lock braking system with electronic brake assist, daytime running lights, dynamic stability and traction control system, front fog lights, intelligent driver information system, and a collapsible steering column. In addition, the Volvo S40 has front passenger and driver airbags, an energy absorbing interior, energy absorbing front structure, and head restraints for all seats. Also the 2011 Volvo S40 includes an inflatable curtain, pedestrian protection, a reinforced passenger compartment, pretensioners on all seat belts, side impact air bags, side impact protection system and whiplash protection system.
Child safety features on the Volvo S40 include a LATCH system. In addition, the S40 is equipped with Home Safe lighting, emergency trunk release, engine immobilizer and theft protection locks, remote locking system and a remote alarm system. In addition, other safety features that are included are Adaptive Cruise Control (ACC) with Distance Alert which helps the driver to keep a safe distance from vehicles in front of them at higher speeds. Driver Alert Control (DAC), Collision Warning with Auto Brake (CWAB), Lane Departure Warning (LDW), Dynamic Stability and Traction Control (DSTC), adaptive brake light, Dual Xenon lights as well as Active Bending lights (ABL) which are available as an option and water repellent front side windows. These additional features not only protect the driver of the Volvo S40 but help to ensure the safety of others around them as well.