You wouldn't equate lungs, a gastric system, and blood purifiers with a car - but when it comes to essential functions, vehicle filters play a similar role in your engine's wellbeing.
Look no further than the filters to find the keepers of your car's good health, come rain or shine.
"Think of your car as a highly tuned athlete, and filters as the kidneys, lungs and liver all rolled into one," says Dylan Petzer, National Vice Chairman of the Tyre, Equipment and Parts Association (TEPA), a proud association of the Retail Motor Industry Organisation (RMI). "Each filter plays a vital role in keeping the vehicle running smoothly."
It's easy to leave this to the mechanic, but Petzer stresses that understanding your filters puts you in control. "Knowledge is power. If you understand what filters do, you'll be able to ask the right questions and avoid unnecessary repairs. For example, if your car is sluggish, it could be the air filter. If it's stalling, maybe the fuel filter."
He adds that proactive maintenance - like regular filter changes - is the ultimate money-saver. "Healthy filters are like exercise and a balanced diet for your car. They keep everything clean and extend your car's life."
The Four Main Filters You Should Know:
1. Air Filter (Your Engine's Lungs):
This is your engine's first line of defence, filtering out airborne particles. A clogged air filter restricts airflow, resulting in reduced horsepower, lower fuel efficiency and increased emissions. "It's like trying to run a marathon while breathing through a dusty sock," says Petzer.
2. Fuel Filter (The Gastric Gatekeeper):
Usually located along the fuel line or inside the tank, the fuel filter blocks dirt, rust and contaminants from reaching your engine. "Dirty fuel can cause sputtering, stalling, and even total engine shutdown," he warns.
3. Oil Filter (The Blood Purifier):
This screw-on canister traps debris in the engine oil, preventing it from recirculating and causing damage. "A dirty oil filter is like washing dishes with muddy water. It increases engine wear and can lead to costly repairs," says Petzer.
4. Cabin Air Filter (Your Personal Air Purifier):
Tucked behind the glovebox or near the windshield, this filter doesn't affect the engine but is essential for the air you breathe. "It filters out pollen, fumes and dust. A clogged one can worsen allergies and reduce aircon efficiency."
Why Filter Maintenance Matters:
Neglecting your car's filters can be disastrous. "A clogged air filter starves the engine of oxygen. A neglected fuel filter can lead to premature fuel pump failure - a very expensive repair. And a dirty oil filter acts like sandpaper, accelerating engine wear," Petzer cautions.
If you're now wondering whether your filters need replacing, don't rush to buy the cheapest option. "This is not the time to cut corners but it is worth doing your homework," he advises.
TEPA's Filter Buying Guide:
- OEM (Original Equipment Manufacturer) Filters
These are designed for your specific vehicle by the manufacturer or their authorised suppliers. They're reliable, high-quality, and fit perfectly.
- Reputable Aftermarket Filters
Matching quality parts from brands like Mann, Bosch, Wix, Fram and Mahle often meet OEM standards. These are cost-effective and dependable alternatives and often more economical.
- No name filters:
Low-cost filters may be made of subpar materials, fit poorly, and fail prematurely, causing restricted flow and leaks. Usually if a price is too good to be true, it usually is and it is always worth checking the guarantee on these lower cost parts too.
"When it comes to fuel and oil filters, always choose OEM or a trusted aftermarket brand," Petzer urges. "The wrong choice could save you money now but could end up costing you thousands later. "
"Your car is an investment. Treat it right, and it'll return the favour. Understand your filters, choose quality parts, and stick to recommended service intervals at accredited workshops. That's the recipe for a longer-lasting, better-performing car and many miles of safe driving," concludes Petzer.