What is an air filter blocked assessment?

The air filter in your car prevents dust, dirt, and debris from entering the engine. Over time, the filter becomes clogged and restricts airflow. An air filter blocked assessment identifies whether the filter is dirty, damaged, or overdue for replacement, helping restore engine performance and efficiency.

Why do you need an air filter assessment?

A clean air filter allows the engine to breathe properly. If the filter is blocked, the engine has to work harder, which reduces power, increases fuel consumption, and can cause long-term wear. Checking and replacing a blocked air filter is a simple, cost-effective way to keep your vehicle running smoothly and ensure it passes WOF inspections.

Common signs your air filter is blocked

• Reduced engine power or sluggish acceleration
• Increased fuel consumption
• Unusual engine sounds, such as coughing or sputtering
• Strong fuel smell from the exhaust
• Visible dirt or debris when the air filter is inspected

If you notice these issues, it’s worth having the filter checked and replaced if necessary.

What happens during an air filter blocked assessment?

A mechanic will remove and visually inspect the air filter for dirt, debris, or damage. The filter housing is checked for cracks or leaks, and the mechanic may test engine performance to confirm if restricted airflow is the cause of reduced efficiency. If the filter is blocked, a replacement is recommended.

How much does an air filter replacement cost?

In New Zealand, replacing a blocked air filter typically costs between $40 and $80, depending on your car’s make and model. Premium or performance filters may cost more, but most replacements are quick and affordable. The assessment itself is often included as part of a routine service.

Is it safe to drive with a blocked air filter?

Yes, the car will still drive, but engine performance and fuel economy will be noticeably worse. Prolonged driving with a blocked air filter can cause carbon build-up, damage sensors, and reduce the life of the engine. Replacing the filter promptly ensures better performance, lower running costs, and reduced emissions.