It's the Dynamic Stability Assistance system.
1 out of 1 people think this is helpful.
Oops. I went to that link TS and I stand corrected, I thought it was exclusive to Volvo
Looking for a Used S40 in your area?
CarGurus has 1,175 nationwide S40 listings starting at $2,500.
Search Volvo S40 Questions
Volvo S40 Experts
Related Models For Sale
Used Toyota Camry"
1,019 Great Deals out of 74,837 listings starting at $1,500
Used Cars For Sale
2011 Volvo S40 For Sale
5 Great Deals out of 67 listings starting at $9,400
2010 Volvo S40 For Sale
6 Great Deals out of 75 listings starting at $7,995
2009 Volvo S40 For Sale
8 Great Deals out of 68 listings starting at $6,883
2008 Volvo S40 For Sale
8 Great Deals out of 99 listings starting at $5,690
2007 Volvo S40 For Sale
8 Great Deals out of 175 listings starting at $4,800