Ford S-Max Timing Belt: Intervals, Fitment & Warning Signs

Like the Galaxy, the S-Max's main engines avoid the wet belt risk seen elsewhere in Ford's range — but the 2.0 EcoBoost brings its own timing chain wear pattern.

Illustration of a timing belt and pulleys

Illustration for editorial purposes

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OEM Part Number: 1787857

Genuinely distinctive to know: the 1.6/2.0 TDCi diesel (DV6/DW10 engine family) was jointly developed with PSA (Citroen/Peugeot), and this exact timing belt kit is the same part sold under Citroen and Peugeot badges — the identical reference covers this Ford alongside the Citroen C4/C5 and Peugeot 308/508 of the same engine generation.

1.6 TDCi (DV6 family), genuine timing belt kit	Ford OEM: 1787857 (also referenced as 0831.W2) — same part badged as Citroen/Peugeot 0831.W2

Confirmed: The S-Max's Main Engines Sidestep the 1.0 EcoBoost "Wet Belt" Risk — Ford S-Max Timing Belt

Like its Galaxy sibling, the S-Max has mainly been sold with the larger 1.5-litre and 2.0-litre EcoBoost petrol engines, or with a diesel — so the wet timing belt considerations covered on our smaller Ford models generally don't apply here. Always confirm your exact engine via your VIN rather than assuming, but for the large majority of S-Max models this specific concern isn't relevant.

A separate, genuine concern on the 2.0 EcoBoost specifically: this larger engine has a documented tendency toward intake valve carbon build-up (a known characteristic of direct-injection engines generally) and timing chain tensioner wear, particularly on cars used mainly for shorter journeys. A cold-start rattle or gradually rougher idle is worth having checked rather than dismissed as normal turbo-petrol character.

Ford S-Max Timing Belt: Generations & Engines: Belt or Chain

Mk1 (2006–2015), 2.0 TDCi diesel	Timing belt — see genuine reference above
Mk1, 2.0/2.5 petrol	Timing chain — differs from the diesel range
Mk2 (2015–2022), 1.5/2.0 EcoBoost petrol & 2.0 EcoBlue diesel	Timing belt — conventional dry belt

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Ford S-Max Timing Belt: Generations & Engines: Belt or Chain

Mk2 (2015–2023), 1.5/2.0 EcoBoost petrol	Timing chain — larger EcoBoost units differ from the smaller 1.0's wet belt
Mk2, 1.6/2.0 TDCi diesel	Timing belt — see genuine reference above

Ford S-Max Timing Belt: Watch: Replacing It

🎬 Watch: Ford 2.0 TDCi (DV6/DW10 family) timing belt replacement

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This covers the shared PSA-Ford diesel platform. Chain-driven EcoBoost petrol engines don't need this procedure — check which your car has above.

Ford S-Max Timing Belt: Warning Signs, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Timing Belt Guide for symptoms to watch for, confirming fitment against your VIN, and which aftermarket brands are worth trusting.

More Ford Timing Belt

The same part, covered across other Ford models.