This article explores the impact of environmental factors on the performance of car door lock actuators, crucial components of modern vehicle locking systems. It highlights how temperature extremes, humidity, moisture, dust, dirt, and mechanical stress can impair actuator functionality. The article also discusses protective measures, including sealing, regular maintenance, waterproofing, and anti-vibration solutions, to extend the lifespan and reliability of car door lock actuators. By addressing these environmental challenges and implementing preventive strategies, car owners and manufacturers can enhance actuator performance and ensure consistent vehicle security.