I recently purchased a Galaxy and due to smells in cabin I have changed mine (there wasn't one there at all -hence smell). You need to take off engine cover and then remove the bulkhead extension - it has the top rubber bonnet seal pushed on to it and is held in place by three bolts - far left, middle and far right of top of engine bay. The extension will pull out once bolts removed and you will need to pull on left side more so you cam feed it around the water bottle. You should now be able to see the filter on the right hand side running from the centre to the right end of the engine bay. It is held in place by a plastic cover which the filter sits in. Hope this helps.