If you throw it in the glove box or console so a repair shop can find it easily, it often rolls around and makes annoying noise. If you stick it in the tool bag by the spare tire, a tech still has to go looking for it maybe under the spare or with the jack. Thought of this (probably not just me) idea of using a neodymium magnet you can stick anywhere near the spare which would be the most logical place to look,
and then the key will stick to that,
Under $2.
and then the key will stick to that,
Under $2.