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DW12DW12BTED4ZSD-422

2.2 HDi 170-175 twin-turbo (DW12 BTED4, 2005-2010) engine: faults and reliability

PSA/Ford 2.2 HDi and TDCi (DW12) version

With caution

The two-turbo system adds mechanical complexity; fiches-auto records a significant number of turbo cases in the twin-turbo versions, although, according to the same source, it does not amount to a chronic problem.[1][2]

Years
2005–2010
Power
170–175 hp
Faults that affect it
3
2 of high or critical severity
Cars that use it
7
in our database

12 sourcesHow we work

What changes in this version

It adds a second turbocharger: two fixed-geometry turbos working in sequence (one at low revs, the second joining in from around 2,700 rpm) to reduce response lag without losing low-rev torque. It is the most powerful version in the Peugeot 407, 607 and 807, and the Citroën C5, C6 and C8; Ford used a similar output (155-175 hp) in the Ford Mondeo IV under the name 2.2 TDCi.[3][4][5][6][7]

Engine codes of this version: DW12, DW12BTED4, ZSD-422.

Faults of the DW12 engine

The documented engine faults that affect this version and its years, from most to least important.

  1. 1High severityFrequency: OccasionalTurboTurbo faults, somewhat more frequent on the sequential twin-turbo versionsThe 2.2 HDi comes in single-turbo versions (128-156 hp) and twin-turbo versions with two turbochargers in sequence (170 hp and up). Fiches-auto does not consider it a chronic problem, but it does record a significant number of turbo cases across all power outputs, somewhat higher on the twin-turbos.
  2. 2High severityFrequency: OccasionalInjectionPiezo injector wear and failureThe 2.2 HDi uses third-generation common-rail injection with piezo injectors at up to 1,800-2,000 bar. Fiches-auto documents injector cases across several power outputs, without it being the most repeated fault, with symptoms of hard starting, jerking or higher fuel consumption.
  3. 3Medium severityFrequency: RareClutchDual-mass flywheel wear, less frequent than on other HDi enginesThe 2.2 HDi has a dual-mass flywheel but, unlike smaller HDi engines such as the 1.6 HDi, fiches-auto does not document a chronic problem: very few cases in the tables consulted. Even so, it is a wear part: vibration and knocking are the signs to watch for before buying.

Cars fitted with the DW12 engine

Open each car to see all its faults with this engine and what to check before buying it.

Citroën

Ford

Peugeot

Frequently asked questions

Is the DW12 engine reliable?

Our verdict is “With caution”. The two-turbo system adds mechanical complexity; fiches-auto records a significant number of turbo cases in the twin-turbo versions, although, according to the same source, it does not amount to a chronic problem.[1][2]

What faults does the DW12 engine have?

The documented ones that affect this version, by importance: turbo faults, somewhat more frequent on the sequential twin-turbo versions (high severity), piezo injector wear and failure (high severity) and dual-mass flywheel wear, less frequent than on other HDi engines (medium severity).

Which cars use the DW12 engine?

Peugeot 407 (2004–2009), Peugeot 607 (1999–2010), Peugeot 807 (2002–2010), Citroën C5 I (2001–2007), Citroën C6 (2006–2010), Citroën C8 (2002–2010) and Ford Mondeo IV (2007–2014).[3][4][5][6][7][8][9][10][11][12]

Are you buying a car with the DW12 engine?

We will put you in touch with a partner only if you authorise it in the form.

Do you have a car with this engine? Tell us which faults you have had and at how many kilometres. Report your fault.

Sources

Every fact on this page links to its source. If you find an error, let us know.

  1. Essai, avis et fiabilité des 2,2 HDI 204 chevauxFiches-Auto · Motoring press · consulted 27 September 2026 · in French
  2. Essai, avis et fiabilité des 2,2 HDI 136 chevauxFiches-Auto · Motoring press · consulted 27 September 2026 · in French
  3. Citroën C5 2.2 HDI 173 FAPAutopista.es · Motoring press · published 15 June 2006 · consulted 27 September 2026 · in Spanish
  4. Peugeot 807, ahora con motor 2.2 HDi de 170 cvMotorpasión · Motoring press · published 31 October 2007 · consulted 27 September 2026 · in Spanish
  5. Peugeot 807 / Eurovan (Sevel)Wikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
  6. Citroën C6Wikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
  7. Essai Citroën C5 Exclusive + 2.2 HDI 200 TourerActu Automobile · Motoring press · published 2011 · consulted 27 September 2026 · in French
  8. Peugeot 407Wikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
  9. Peugeot 607Wikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
  10. Citroën C5Wikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
  11. Ford MondeoWikipedia (francés) · Other source · consulted 27 September 2026 · in French
  12. Ford Mondeo 2.2 TDCi de 155 CV TitaniumAutopista.es · Motoring press · published 10 September 2004 · consulted 27 September 2026 · in Spanish