I was having the same issue as some others were having. My Honda civic 2005 LX automatic has its airbag light on for a couple of weeks. I first tried to reset it but was unsuccessful so I checked the battery and it was bad. So after I changed the battery the light was still on. I tried to reset it using the paper clip method but still same. I found out the code was 5-2 (internal failure of SRS unit). So I decided to change the SRS unit and changed it but the light never came off. I also tried changing the instrument panel just if that helps but still same. Then I found out that the alternator might cause srs code but when it was checked the alternator was fine (14.4 volt with ignition on). The code is 5-2. Anyone has any idea? The Honda dealers couldn't figure it out so they say they need to replace the entire front for $2000 + labor. That is expensive. If anyone has any idea help please.
Thanks.

 

An SRS light can also be caused by dirty contacts for the switch on the driver's seat belt buckle. I took mine apart weeks ago to clean it, causing the light to go away. Months later, the issue came back. This time, the cause is unknown.