When most people consider car maintenance, they think high ticket items, engines, transmissions, etc. But an unfortunate reality is that a number of smaller parts fail much sooner than people realize and cause all the stubborn issues that seem to come out of nowhere.
But these parts are not necessarily those that mechanics recommend be changed every inspection. These parts fail slowly, in silence, until they’re completely dead or in the case of some, broken, and what could have been a simple fix turns into a more invasive and expensive operation.
Belts and Hoses
All those rubber parts might look like they’re okay, but eventually, they fail. Serpentine belts, timing belts and all those different hoses running through your engine compartment break down over time with constant exposure to heat/friction/stress. They crack, harden and become brittle.
But the issue is that most drivers don’t even look at their belts and hoses. A timing belt boasts it can go 100k kilometers but if you’re in extreme temperatures or stop and go traffic all the time, your belt is aging faster than suggested. When a timing belt breaks, it’s not just sitting on the roadside; it’s creating disaster for the engine that involves thousands of dollars of repairs.
Coolant hoses are also a fault. Even though they appear safe, the constant heat and cooling that go through them break them down from the inside out. They’re not going to leak immediately; they’ve been breaking down for miles and months prior. Getting a car service that checks these wear items to avoid getting stuck on the side of the road with steam coming out of your hood is a good idea.
Brake Parts
Everyone knows brake pads fail. That’s not news to anyone. But brake rotors, calipers and brake fluid all fail way sooner than people realize, and some fail well before expected.
Brake rotors don’t last forever no matter what people think. Every time a driver accelerates to stop, they’re generating heat and friction through the pad onto the rotor. Depending on style (and if we’re realistic about city driving constantly braking more), the rotors need to be replaced or resurfaced long before major service intervals. Warped rotors cause that pulse when braking; ignoring it doesn’t make it go away.
Brake fluid is even worse because it’s hygroscopic. This means it absorbs water over time. This lowers its boiling point as well as its efficacy when stopping, crucial moments when drivers need their brakes most. Manufacturers suggest changing it every 1-3 years; hardly anyone does.
Suspension
Shocks/struts should not survive the lifetime of a vehicle, though they may feel that way to drivers. Shocks/struts wear down so gradually that drivers don’t feel the difference until they have new ones and suddenly remember what the ride once felt like.
It’s probably due for a replacement between 80k-120k kilometers depending on road conditions. However, drivers get used to potholes or dips in the road making a once bouncy ride in higher vehicles just second nature over time.
Ball joints/tie rod ends are similar as well. These steering/suspension components have rubber boots over them to keep dirt/moisture out. But once those boots crack (which happens quickly under harsher conditions), they break down rapidly. This means play in the steering with uneven tire wear, which can be unsafe.
Battery Life
Car batteries are much better than ever yet still replaced often, and it’s annoying because they rarely make their theoretical longevity suggested. On average, 3-5 years is all it gets, but extreme temperatures short trips and electrical drains lessen that significantly.
Worst part is that batteries die without warning. Sure, drivers may notice slower cranking on cold mornings, but a lot of batteries go from working just fine to completely dead overnight. Not only this, but with all the electronics in modern cars these days, an afflicted battery causes electrical issues that seem unrelated.
Air and Cabin Filters
These hidden parts go forgotten because they’re under cover and don’t seem like a big deal. However, a clogged air filter inside the engine reduces power/economy while a dirty cabin air filter means drivers are breathing in recycled dust every time they turn on the A/C or heat.
Air filters need to be changed every 20k-30k kilometers but shorter intervals exist for those who frequently drive in stop-and-go traffic or dirty streets. While drivers may not realize how bad their air filter is, it’s a gradual performance loss, but after thousands of dollars sunk into repairs over time, they’ll feel it eventually and snap out of it.
Cabin filters are worse because people forget there’s even one there. That musty smell when you turn your A/C on for the first time? Well, that’s usually a cabin filter that’s saturated from moisture/dirt/unknown substance from way too long ago.
Spark Plugs and Ignition Components
Spark plugs last longer than ever before relative to older styles but “longer” still doesn’t mean forever. Depending on if it’s copper, platinum, iridium, or whatever spark plugs are good between 50k-150k kilometers. If people run them too long, they’ll experience bad idling, poor fuel economy and hard starts.
Ignition coils do not fail on a schedule but when they do, they cause misfires and the check engine light. These fail unexpectedly relative to mileage allowed as well.
Preventative Maintenance Reality
The truth is there are wear items throughout a vehicle meant to be swapped out throughout its lifetime. These aren’t defects or poor design; they’re items doing their jobs and a constant wear-and-tear factor combined stress means it’s up to drivers on how well they can avoid complications.
These aren’t expensive items when put together; belt replacement is relatively cheap; wiper blades are definitely cheap; brake fluid changes don’t break the bank either. But when combined with other random factors, like thrown belts catching other components in their travels to destruction or worn suspension ruining tires, the costs compound quickly.
Preventing early failures does not require obsessive checks or paranoid vigilance; it’s simply awareness of service intervals/replacement (not waiting until catastrophic failure) and understanding how some items just don’t last as long as others.
