Second Hand Peugeot 406 Cylinder Head

The Peugeot 406 ran from 1995 to 2004 in a single generation, with a facelift in 1999 that brought styling and trim changes but no fundamental engine architecture shift. Whether a cylinder head from a pre-facelift (1995–1999) car fits a post-facelift (1999–2004) car depends primarily on the engine code, not the facelift year itself. Give your engine code to the breaker and ask them to match it directly, as ancillary and mounting details can vary mid-production in ways that aren't always documented by year alone.

The engine code is the single most important detail for matching a cylinder head — it tells the breaker exactly which block and head specification your car uses, regardless of the year or trim badge. You'll find the engine code on your V5C registration document or via a VIN check, and it's far more reliable than going by year or model name alone. Mechanical parts follow the engine code, not the badge, so always lead with that when contacting a breaker.

No — petrol and diesel cylinder heads are completely different components and are not interchangeable under any circumstances. The combustion chamber design, injector or spark plug locations, and overall specification differ fundamentally between fuel types. Always confirm whether the donor head is from a petrol or diesel engine before agreeing a purchase.

Trim level makes no difference whatsoever to cylinder head fitment on the Peugeot 406 — the LX, SR, GLX, and Executive badges describe the interior and equipment specification, not the engine. What matters is that the engine code on the donor car matches your own, so a head from an LX is mechanically identical to one from a GLX if the engine code is the same. You may simply receive a head with different ancillary parts fitted to it, so confirm with the breaker what is included.

The 406 facelift arrived in 1999, meaning 1999 cars could be either pre- or post-facelift depending on when in the year they were built and registered. For a mechanical component like a cylinder head, the facelift boundary is less critical than your engine code, but it's worth confirming the exact build date with the breaker to rule out any mid-year ancillary changes. Route this directly to the breaker with your registration or VIN so they can verify against the specific donor vehicle.

Some PSA Group engines — particularly certain diesel units — were shared across Peugeot and Citroën models of this era, so a cylinder head may in principle fit across brands if the engine code matches exactly. However, ancillary components, sensors, and mounting details can differ even between cars sharing the same base engine, so you should not assume compatibility from brand or engine family name alone. Always confirm against the specific engine code with the breaker before purchasing.