Is Your Car Ready for 100,000km?

Why 100,000km is such a big milestone

Most of the servicing you’ve likely done up to now has been the routine stuff. Oil changes. A new filter here and there. Nothing too painful or expensive. If you own a European car, you should have done a couple of things that were more extensive: on an Audi or VW, for example you would (or should) have serviced the DSG transmission and possibly the Haldex AWD system.

The thing about the 100,000km mark is that it’s where the longer-life components are due. These are the parts nobody thinks about, because they quietly do their job for the best part of a decade. Then their time’s up, and a few of them tend to line up all at once. Knowing that in advance is half the battle.

The big one: your timing belt

If there’s a single job we’d flag above all others, it’s this. Loads of cars run a timing belt (sometimes called a cam belt), and most manufacturers want it replaced somewhere around the 100,000km mark, give or take depending on the model.

Here’s why it matters so much. That belt keeps the top and bottom of your engine spinning in perfect time with each other. If it snaps while you’re driving, the damage can be brutal, and we’re talking a repair bill that often costs more than the car’s worth. Replacing it on or before schedule is cheap insurance by comparison.

Some newer cars use a timing chain instead, which generally lasts longer. Even then, it’s worth having someone check it. Not sure which one your car has? We can tell you in about two minutes.

Fluids don’t last forever either

Fresh fluids are the lifeblood of a healthy car, and by 100,000km a few of them are well overdue for a change.

Your automatic transmission fluid is a big one. Left too long, it breaks down and stops protecting all those expensive gears inside, and a transmission rebuild is not a bill anyone enjoys getting. Coolant gets tired too, slowly losing its ability to stop the engine overheating or quietly corroding from the inside out. Then there’s brake fluid, which absorbs moisture over the years and can leave your pedal feeling soft right when you need it firm. None of these are dramatic jobs on their own. Skip them, though, and they turn into pricey ones.

The wear-and-tear stuff

Then there’s everything that simply wears down with age and kilometres.

Suspension is the classic example. Those shocks and bushes have soaked up every pothole and speed bump for years, and by now they’re often past their best. You might notice the car feeling a bit floaty, or a knock coming through over rough roads. Brakes deserve a proper look as well, because pads and rotors don’t last the life of the car. Belts and hoses under the bonnet start to perish and crack with age. And if your spark plugs haven’t been touched, they’re probably ready for a fresh set to keep the engine running smoothly and sipping fuel rather than gulping it.

Buying a used car near 100k? Read this first

If you’re shopping for a second-hand car sitting on 95,000 or 100,000km, don’t let the number scare you off. A well-looked-after car at that mileage can have loads of life left in it. The key is the service history.

Ask to see the logbook. Has the timing belt been done? What about the transmission and the coolant? If those big jobs are already ticked off, brilliant, you’re buying real peace of mind. If they haven’t been touched, that’s not a dealbreaker, but you’ll want to factor the cost in and get onto them fairly soon. Better yet, bring the car to us for a pre-purchase inspection before you hand over any cash.

Don’t wait for the warning light

The tricky thing about milestone servicing is that your car often feels perfectly fine, right up until it doesn’t. A timing belt gives you no warning at all before it lets go. Worn suspension creeps up so slowly that you stop noticing it. That’s exactly why the 100k service exists, to catch the things you can’t see or feel just yet.

Get it sorted now and you can keep enjoying a car you already know and trust, for years and plenty more kilometres to come. That’s a much nicer feeling than waiting on a tow truck.