This overlooked car maintenance mistake could cost you over €1,000—experts warn it’s more common than you think

The Beating Heart of Your Engine

The timing belt is quite literally the beating heart of your engine. Its job? Making sure the crankshaft and camshaft spin in perfect harmony, so that the valves and pistons always keep their respectful distance. If the timing slips up, the consequences can be disastrous. In so-called interference engines, a mistimed belt can cause valves to bend and pistons to break—often spelling the end for your beloved motor.

Belt or Chain? You’re Not Off the Hook

Some engines swap out the rubber belt for a metal timing chain, but don’t rush to relax just yet. Chains can wear out, too—especially if you skimp on upkeep or drive around with old oil. The only consolation? A chain usually gives a noisy heads-up before it fails. A belt, on the other hand, tends to snap without any warning, leaving your plans—and your engine—in pieces.

A Common Mistake That Costs Big

Every car manufacturer has its own rules, but most want you to change the timing belt between 100,000 and 200,000 kilometers (about 62,000–124,000 miles), or every 5 to 10 years—whichever comes first. Here’s where things go wrong: many drivers feel safe because they clock low mileage, forgetting that rubber ages too. A belt can dry out, harden, and break even if your car spends more time parked than cruising highways.

The quick fix? At every major service, check whether your belt is still within its recommended interval. A good garage can dig up the details in your service records or sometimes just by peeking at the sticker under the hood.

• The belt itself is usually inexpensive—often under £50.
• Replacing it, though, means dismantling a good chunk of your engine. Labor charges ramp up the bill: typically between €600 and €1,200 (about £520–£1,050), depending on the make and engine.
• With some models, if the water pump and tensioners need refreshing too, expect the tab to climb to around €1,500 (£1,300).

But here’s the kicker: putting off the change can cost you so much more. If the belt breaks, repair costs can run into the several thousands of euros, and sometimes, the engine is so badly damaged it’s not worth saving. As mechanics like to say:

The cheapest timing belt is the one you replace on time.

Engines Known for Timing Belt Trouble

A few engines are notorious for timing belt issues. The 1.2 PureTech engines used by Peugeot, Citroën, DS, and Opel, for instance, are infamous for early wear. These engines use a so-called ‘wet’ timing belt that runs in oil. Sounds clever—reducing friction and wear, in theory. In practice, though, the belt material partly dissolves in the oil, clogging up the engine and leading to a grimy mess inside.

Ford’s EcoBoost engines face similar headaches. Manufacturers promised us more efficient engines, but garages report the opposite: crumbling belts, blocked oil pumps, and costly repairs on cars that haven’t even clocked 100,000 kilometers yet.

Out of Sight, Out of Mind? Not Quite

Modern engines hide the timing belt away, tucked behind a sealed cover deep in the engine block. You’ll almost never spot it yourself—unless your hobby is buying endoscopes for fun. (Hey, we won’t judge!) A mechanic, however, can inspect for cracks or wear with the right tool.

Still, here’s what you can do:

• Check your car’s service booklet to see when the belt was last replaced.
• Ask your garage for advice—they can see the maintenance history or look for under-hood stickers.
• If your car is getting older, or it’s been sitting unused for months, consider having the belt replaced proactively.

It’s not the most glamorous maintenance job, but trust us: your engine—and your bank account—will thank you for not overlooking this simple detail.