Volvo v40 2016 SRS AIRBAG MODULE LOCATION AND REMOVAL 

Had a small front end accident do the seatbelt seized. Replaced the seatbelt but the airbag light would not clear with OBD so had to buy a service off ebay to send the module off and get it repaired. They posted it back and I had reconnected it to no more airbag light. Hope that helps.

What was the problem with your old unit, I have a ,lost communication with closing velocity module fault,

Sir can you send me a srs wiring diagram for Volvo v40 2013