Timing Belt Buying Guide
Last updated: 24 April 2026
The timing belt synchronises the rotation of the crankshaft and camshaft(s), ensuring valves open and close at the correct time. A snapped belt can cause catastrophic engine damage (bent valves, damaged pistons) in interference engines. Replace at the manufacturer's interval without exception.
Timing belt replacement intervals
Intervals vary significantly by engine — check your manufacturer's specification.
- Typical intervals: 60,000-100,000 miles or 4-6 years, whichever comes first
- Always replace the tensioner and idler pulleys at the same time
- Consider replacing the water pump if it's driven by the timing belt
- Never exceed the manufacturer's replacement interval
- Keep records — a documented timing belt history adds value to your car
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Replacement intervals, interference vs non-interference engines, and why timing belt failure is catastrophic.
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Frequently Asked Questions
How often should the timing belt be replaced?
Every 60,000-100,000 miles or 4-6 years depending on the engine. Check your manufacturer's service schedule for the exact interval.
What happens if the timing belt breaks?
In interference engines (most modern cars), a broken timing belt causes pistons to hit valves, resulting in bent valves, damaged pistons, and potentially a destroyed engine.
Should I replace the water pump with the timing belt?
If the water pump is driven by the timing belt, yes. Labour is the major cost — replacing both together saves money long-term.
How much does timing belt replacement cost?
The price of a timing belt depends on your exact vehicle and the brand you choose. Enter your registration above to see parts confirmed to fit, then compare prices from the brands we stock on this page. Free UK delivery on orders over £99.
Related Guides
P0340 fault codes, misfires, and rough running — how camshaft sensors control valve timing and when to replace them.
Crankcase Ventilation (PCV) Valve Buying GuideOil leaks, high oil consumption, and rough idle — how the PCV valve prevents pressure build-up, clogging symptoms, and easy replacement steps.
Crankshaft Position Sensor Buying GuideNo-start, misfires, and sudden engine cut-out — how the crankshaft sensor works, fault codes, and choosing the correct replacement.
Drive Belt Buying GuideSerpentine and auxiliary belt replacement — signs of wear, tensioner advice, and what happens when a belt snaps.
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