When to replace the timing belt

The timing belt keeps the engine’s valves and pistons in step. If it snaps on many engines, the damage can be severe and expensive.

How often

Many belts are due at about 60,000 to 105,000 miles (100,000 to 170,000 km) or 5 to 10 years, whichever comes first. The manual gives your car’s figure. Some engines use a timing chain instead, which usually has no scheduled replacement.

Why it matters

On what’s called an interference engine, a broken belt lets the pistons hit the valves. That can mean a rebuilt or replaced engine. Replacing the belt on schedule is far cheaper.

Warning signs

A ticking or whining noise from the front of the engine.
An oil leak near the belt cover.
The engine misfires or won’t start.
You’ve passed the interval in your manual, even if the car runs fine.

Often done with the water pump

The water pump is usually driven by the same belt, and the labor overlaps. Many shops replace both together.

Common questions

Does my car have a belt or a chain?

Look in the owner’s manual or ask a garage with your license plate. Chains last much longer but can still wear.

What if I don’t know when it was last done?

On a car with a belt and a history you can’t confirm, many mechanics suggest replacing it to be safe.

General guidance, not professional advice. Intervals are typical ranges and vary by car, so check your owner’s manual and ask a qualified mechanic if you’re unsure.