As I learned the hard way back in high school, if you’re driving a ’70’s era Subaru with a manual transmission, it may behoove you to own a pair of long needle-nosed pliers with a bend in the jaws. A lack of this tool turns replacing a clutch cable from a 30-minute task to a 2-hour task. That’s 2 hours of lying on the back of your neck upside-down in the driver’s footwell trying to remove and replace a cotter pin by reaching a pair of straight needle-nose pliers through a hole in the actual clutch arm… yeah, buy the pliers.
If you own a 2009, replacing the #1 spark plug requires a wobbly (“universal joint”) socket extension due to the placement of a pressure sensor solenoid mounting bracket. At least, I think that’s what the device is, I can’t find a specific picture. It’s a block with a half-dozen or so small-diameter pipes sprouting out of it, and it looks like way to big of a pain to remove. A wobbly adapter is useful and only costs $3, so it’s worth the purchase.
The irritating part is that there’s nothing in the owner’s manual about spark plugs save for one small section that says something along the lines of “this should be done at intervals, but it’s difficult, so take it to your dealer”. How about you include pertinent information for those of us who actually have the same skills and don’t feel like buying the dealer repair manual?