When it comes to vehicle maintenance, few tasks seem as deceptively simple as changing a filter. Whether it’s your air, cabin, oil or fuel filter, the temptation to roll up your sleeves and save on labour costs is understandable. But as Dylan Petzer, National Vice Chairman of the Tyre, Equipment and Parts Association (TEPA), points out, not all filter replacements are created equal — and some might just be a disaster waiting to happen if attempted without the right expertise.
Not All Filters Are Equal
“Replacing an air filter is a DIY delight,” says Petzer. “It typically involves unclipping a few fasteners or removing a few screws — a five-minute job at most.” The cabin air filter can also be tackled by most motorists, although it can be a bit fiddly due to tight compartments and awkward clips.
But the simplicity ends there.
“An oil filter, for instance, is another story altogether,” explains Petzer. “Not only does it require draining old oil and refilling the engine, but it can also take up to an hour to complete properly. And things escalate quickly with fuel filters — many of which are buried deep beneath seats or integrated inside the fuel pump assembly within the tank itself.”
This isn’t just about convenience. Fuel systems involve flammable liquids, pressurised lines and components that require specialist tools to access. “Unless you’re genuinely experienced and properly equipped, this is not a job for the driveway,” Petzer cautions. “Fuel leaks and potential fires are not something to play with.”
Common Filter Faux Pas
Even when the task seems simple, small mistakes can have major consequences. TEPA has seen it all, and Petzer highlights a few frequent filter-related missteps:
- Air Filter: Ignoring directional arrows. Many air filters are designed to be installed a certain way, and reversing the airflow means poor filtration and reduced performance.
- Oil Filter: Leaving the old gasket behind. This causes the dreaded “double gasket” effect, which will almost certainly result in a major oil leak once the engine is running.
- Fuel Filter: Failing to depressurise the system. This isn’t just a mess — it’s dangerous. Fuel spray under pressure poses both fire and injury risks.
Quality Counts — So Does Fitment
Choosing the right filter for your vehicle is not just about brand loyalty. “Fitting the wrong filter, or fitting the right one incorrectly, can cause everything from minor inefficiencies to catastrophic engine damage,” says Petzer. “This is particularly serious when it comes to oil and fuel filters, where sealing, flow rate, and fitment tolerances are vital.”
He urges motorists to always double-check the filter part number and, if in doubt, physically compare the new and old filters — looking at size, shape, gasket placement and connection ports. “It’s a small step that can save thousands in future repair bills.”
The Pro Advantage
Beyond tools and know-how, professional technicians also understand the safety protocols needed for tasks involving flammable liquids and pressurised systems. “Changing a fuel filter, for example, may require removing a fuse to depressurise the pump, and it must never be done near open flames or sparks. A fire extinguisher and proper eye protection are also a must,” says Petzer.
Once any filter is installed, a quick post-installation check — including a short drive and inspection for leaks, strange noises, or warning lights — is essential.
Aftermarket Insight
Another tip from Petzer: don’t automatically assume that dealership-branded parts are your only option. “Many aftermarket filters are produced by the same manufacturers and offer excellent performance and value. Savvy consumers can save without sacrificing quality — provided they buy from reputable sources and verify compatibility.”
Final Thoughts
While it’s true that some filter replacements are within the capabilities of the average car owner, others are best entrusted to professionals. The cost of a mistake — whether financial, mechanical or personal — often far outweighs the initial saving.
So before you reach for the toolbox, consider what’s at stake. And when in doubt, TEPA and its network of accredited specialists are just a call away.
