The best decision is to purchase for Volvo XC90 3.2 efficient up-to-date bulbs of reliable producers. Actually, cars with 3.2 motors produced by Volvo sometimes need bulb change in headlights. When you drive Volvo XC90 at dark time, you’ll certainly need front lights on. In production of 2004 model year cars with engine code B5254T2 the brand used high technology lamps. The recommended type is D1S and cap also should have the base PK32d-2. After some time the 12 V light bulbs may become less bright in XC90. You should keep up with Volvo’s recommendation to put into vehicle headlights only 35 W capacity bulbs.
The obvious thing is that other cap than D1S won’t suit Volvo’s headlight module in 2010 model year. The problems with fitting PK32d-2 base bulb in holder may appear with 2005 XC90. But power of 35 W is just optimal feature, real light of 12 V lamp may be much stronger. It’s no need to take the headlight of XC90 2.4 apart, Volvo provided simple bulb change.
Take into account all recommendations for 2004 Volvo XC90 and drive safe enough. If you replace bulbs in XC90 with engine 2.4 by yourself, take care. Note that having bought other bulb than PK32d-2 and cap type D1S you won’t fit it into 2007 Volvo. Provide exactly needed voltage of 12 V and don’t forget nominal power 35 W.