Don't Forget to Check Your Airbox Drain Valve

If you've ever spent an afternoon tinkering with your engine and noticed a weird little rubber nipple hanging off the bottom of the intake, you've likely found your airbox drain valve. It's one of those parts that's so small and inconspicuous that most people don't even realize it's there, let alone that it needs a bit of attention every now and then. But despite its humble appearance, this tiny component plays a pretty big role in keeping your engine running smoothly and making sure your air filter doesn't turn into a soggy mess. ...

February 28, 2026 · 6 min · Heap Benedikt