NHTSA Complaint #11647879 — 2024 TOYOTA COROLLA

Upon startup in cold weather conditions, a brief but loud grinding/rattling sound will occur. The noise is related to an inadequate spring inside of the intake camshaft gear which will not push a small cylinder in place to lock the intake camshaft gear in place. When not in its proper place, the gear will rattle in its housing, causing the brief noise. If the gear rattles against its housing too hard overtime, it can break and cause catastrophic engine failure by sending metal pieces into the engine, including pistons and rods.