Peugeot 508 Timing Belt: Intervals, Fitment & Warning Signs

Confirmed: the 508's PureTech petrol engine shares a well-documented wet belt risk with Peugeot's smaller models — including why a passed inspection doesn't guarantee the belt is sound.

Illustration of a timing belt and pulleys

Illustration for editorial purposes

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OEM Part Number: 0831.W2

Genuinely distinctive to know: the 1.6 HDi/TDCi diesel (DV6 engine family) was jointly developed with Ford, and this exact timing belt kit is the same part sold under the Ford badge as well — the identical reference covers this Peugeot alongside the Ford Fiesta, Focus, Mondeo, and B-Max/C-Max/EcoSport, since PSA and Ford shared this diesel platform.

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

Confirmed: The 1.2/1.5 PureTech's Wet Belt Carries a Well-Documented Risk — Peugeot 508 Timing Belt

If your 508 has a PureTech petrol engine (1.2 or 1.5-litre, badged PureTech 110 through 225), this is genuinely worth knowing before anything else on this page. This engine family uses a "wet belt" — a timing belt that runs submerged in engine oil rather than in a dry cover — and it shares a well-documented, serious history of premature failure with the smaller 208, 308, 2008, and 3008. Stellantis's own compensation scheme documentation confirms the 508 (2018 onward) among the models affected by this issue.

What this means practically: Peugeot's official replacement interval has been revised down from an original 10 years/112,000 miles to a considerably shorter 6 years/62,000 miles, given how many failures have occurred well within the original window — treat the shorter figure as the one that matters. A genuinely important point also worth knowing: having a recall or routine check completed isn't necessarily the end of the risk, since the belt runs submerged in oil and genuinely can't be fully inspected without extensive disassembly, meaning a "pass" doesn't guarantee it's sound throughout.

A genuine, current Stellantis compensation portal covers wet belt-related engine failures on qualifying PureTech engines between January 2022 and December 2024, provided servicing followed the maintenance schedule through the authorised dealer network. If your 508 has a diesel BlueHDi engine instead, this specific wet belt concern doesn't apply — confirm your exact engine via your VIN before assuming either scenario.

Peugeot 508 Timing Belt: The Part Where Missing a Deadline Gets Expensive

Very few parts on the Peugeot 508 carry as much risk for neglect as this one does. When it fails on the affected engines, the damage typically isn't contained to the part itself, which is exactly why keeping to schedule matters more here than almost anywhere else.

Before you buy: some engines in the 508 range use a timing belt, others use a timing chain with different maintenance needs entirely. Always confirm which system your specific engine uses via your VIN before assuming a service interval.

Peugeot 508 Timing Belt: What It Does

Exact synchronisation between camshaft and crankshaft rotation — that's what the Peugeot 508's timing belt or chain delivers, timing valve movement to piston position down to the degree. Many engines use an "interference" design, meaning a snapped belt allows pistons and valves to collide, causing serious damage inside the engine.

Peugeot 508 Timing Belt: Generations & Engines: Belt or Chain

Mk1 (2010–2018), 1.6 HDi diesel	Timing belt — see genuine reference above
Mk1, 1.6 THP petrol	Timing chain — same EP6 family with a documented stretch history
Mk2 (2018–present), 1.6 PureTech petrol	Timing chain — larger PureTech unit differs from the smaller wet-belt variants

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Peugeot 508 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 Peugeot Timing Belt

The same part, covered across other Peugeot models.