I just renewed the registration for the car purchased in March 2008. No, you do not need to go for technical inspection if the car is less than 3 years old. Just get our insurance renewed, take the document to the MOI @ City Center (kiosk at the basement level, below cinemas), present your insurance document, and car registration card. Fees is 100 QAR for renewal (Payment to be made by Credit card / debit card). You will get the renewed card at the same time. Hassle free procedure for first 2 years :). Note that MOI is also open on saturday, so you can complete the procedure on a weekend itself.