* This genuine replacement Pre-Motor Filter is located in the dust container and prevents dust and debris from causing damage to your cleaners motor. Pre-filtering is the process of your vacuum intercepting the air before it moves to the suction motor making this replacement filter an integral part. A blocked pre-motor filter is one of the main causes of poor performance in your cleaner as it means less air is passing through the machine which in turn means less suction. If your existing filter is badly clogged it can also cause the motor to cut out after a short time. IMPORTANT: Failure to clean your filters may result in air blockage overheating and reduce the suction of your vacuum cleaner. Cleaning and replacing your filters regularly will help to maintain its best performance. Please check model fit list to ensure this part is correct for your model.