Peugeot DW12
2.2 L · inline-4 · turbocharged · diesel · 2000–present
Also known as: 2.2 hdi, 2.2 bluehdi, dw12ted, dw12uted, 2.2 duratorq, zsd-422
PSA's 2.2 HDi — 85 × 96 mm, DOHC, sixteen valves, from 100 PS to 204 in the DW12 C. One of the most widely borrowed diesels ever built, and the reason a fault found on a Peugeot 407 is worth reading on a Land Rover: beyond PSA it went into the Freelander 2, Discovery Sport and Evoque, the Jaguar XF, Ford's Mondeo and Transit, Fiat's vans, the Mitsubishi Outlander, and Tata's Safari and Hexa. Mahindra re-engineered it as the mHawk for the Scorpio and XUV500.
It is a genuinely durable engine and its reputation is earned — with fuel filters changed on time it will pass half a million kilometres. That is worth saying because it changes what a fault means: a DW12 running badly is much more often its fuel or emissions equipment than the engine.
What actually fails is the high-pressure fuel pump, which leaks, and the EGR valve, which clogs. Both present as poor running and neither is a bottom-end problem. Take a rough-running DW12 to the fuel system first.
Cars fitted with this engine
10 generations, across 9 makes. From the authored catalogue — an absent car means the catalogue has not reached it, not that the engine was never fitted.
Citroën
Ford
Jaguar
Land Rover
Mitsubishi
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Posted about this engine
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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