Log in to the Sims 3 community website using your Origin email and password: http://www.thesims3.com
Select the “Redeem a Code” option under the sub-menu
Click on “Redeem a Code”
Style your Sims with the latest Diesel apparel, accessories and furniture and get ready for successful living. The Sims 3 Diesel Stuff Pack contains the hottest fashions and home furnishings for your Sims from one of the world’s most popular lifestyle brands. Update your Sims’ wardrobes with Diesel styles straight off the runway. Dress your Sims in Diesel’s iconic cutting-edge pieces that have made it a go-to brand for denim apparel. Complete your Sims’ transformation with fashionable designs for the home featuring distinctive Diesel furniture. The Sims 3 Diesel Stuff Pack preps your Sims for the look and the lifestyle they’ve always wanted no matter what neighborhood they live in.