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The original was posted on /r/lifeprotips by /u/AutoXmachine on 2025-11-04 13:13:53+00:00.

If you have an annoying interior rattling in your car but can’t seem to find it because you have to be at the right speed, drive down a certain road, or any other way to make it happen. Pair your phone to your radio (if not already), download a Tone Generator app on your phone and turn your radio about half way up or at least until you know it’s at a good volume. Open the tone generator, set the frequency at 20Hz and slowly go up until you hear the rattle that’s driving you crazy and fix it. I’ve done this for years and fixed numerous of rattles in my car and now it’s so quiet when I drive. If you have a subwoofer this trick will work even better.