Peugeot 406 Differential Replacement Parts

The Peugeot 406 ran as a single generation from 1995 to 2004, with a facelift in 1999, so parts sourced from anywhere within that 1995–2004 window are often compatible — but the engine code is the key detail, because the differential specification follows the engine and gearbox combination rather than the model year alone. A unit from a pre-facelift 1995–1999 car and a post-facelift 1999–2004 car may share the same differential if the engine codes match, but ancillary and mounting changes can occur mid-production, so confirm the exact compatibility with the breaker against your registration before buying.

Yes, fuel type matters here — petrol and diesel engines produce different torque outputs and typically pair with different gearboxes, which means the differential specification can vary between petrol and diesel variants of the 406. Always tell the breaker your engine code (found on your V5 or via a VIN check) alongside whether your car is petrol or diesel, as this is more reliable than going on year or trim alone. Never assume a diesel differential will drop straight into a petrol 406 or vice versa without the breaker confirming the match.

Trim level does not affect differential fitment on the Peugeot 406 — the LX, GL, SL, SE, and GTX badges are cosmetic and equipment distinctions, not mechanical ones. What determines the correct differential is the engine code, gearbox type, and fuel type, so a GTX and an LX with the same engine and gearbox will use the same differential. You may find cosmetic differences in surrounding components when fitting a part from a different trim car, but the differential itself is not trim-specific.

For a front-wheel-drive Peugeot 406, body style — saloon or estate — does not generally affect the differential specification, because the drivetrain follows the engine and gearbox combination rather than the body. However, always confirm with the breaker using your engine code and registration, as ancillary mounting arrangements can vary in ways that are not always documented publicly.

The 406 facelift arrived in 1999, so your 1998 car sits just before that boundary and a 1999 or 2000 donor car sits just after it. Whether the differential crosses that facelift boundary successfully depends primarily on whether the engine codes and gearbox types match — if they do, fitment is likely, but potential mid-production mounting or ancillary changes mean you should confirm this with the breaker against both registrations rather than assuming the facelift year alone makes it incompatible.

The single most useful detail is your engine code, which appears on your V5 logbook or can be found via a VIN check — this tells the breaker far more than the year or trim badge does. You should also know your gearbox type (manual or automatic) and fuel type (petrol or diesel), and having your full registration to hand allows the breaker to verify the spec against their donor vehicle. Providing these details upfront gives the breaker the best chance of confirming a match before any money changes hands.