This is not a difficult job, but may require moving the battery or air intake box to gain access to the rear of the headlights from inside the engine bay. From there, you simply twist and remove the socket that holds the globe in the back of the headlight assembly. Then, you can unplug the globe from the wiring harness and simply replace it with a new globe.

It’s important not to touch the glass portion of the new globe as this can lead to a hot-spot that will shorten the globe’s lifespan. Use a cloth or paper towel when fitting the new globes.

The parking light and headlight globes will be separate and held in separate sockets, and need to be purchased individually. From memory, the headlight unit is what’s called a H4. Now is also the time to consider a headlight upgrade with a brighter replacement globe.

Your consumption is about right for that model Magna. It’s a relatively large and heavy car with a big, powerful V6, and 2001 engine technology. They aren’t a popular car today; they don’t have the safety, economy, or appeal of other, newer cars.

If it smells like it's burning then it is probably overheating. Don't take too much notice of the gauge, because it could be faulty. You need to find out why the fan isn't working, which could be because of a wiring issue, a blown fuse, or a burnt-out electric motor, and get it fixed.