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YD25DDTi

2.5 dCi YD25 engine: faults and reliability

Nissan 2.5 dCi (YD25DDTi) · Nissan

The 2.5 dCi YD25 in the Navara D40 and Pathfinder R51 is tough, but it has one documented weak point: the lower timing chain, whose failure can destroy the engine. Check its condition, as well as the EGR and the turbo.[1][2][3]

Risk index
59
High risk · what it is
Documented faults
4
3 of high or critical severity
Timing
Chain
Technical data[1][4][5]
Production
2005–2015
3 models on this site

6 sourcesHow we work

Which 2.5 dCi YD25 versions should you buy?

Our verdict for each version, based on the documented faults.

  • 2.5 dCi 144 and 174 hp (YD25DDTi, 2005-2010)

    2005–2010 · 144–174 hp · YD25DDTi

    With caution

    Worth buying if there is evidence that the timing chain has already been checked or replaced, because it is the documented weak point.[1][2]

  • 2.5 dCi 190 hp (YD25DDTi, 2010-2015)

    2010–2015 · 190 hp · YD25DDTi

    With caution

    The timing chain remains a point to check; the sources do not indicate that the problem was corrected with the power change.[1][2]

  • 2.5 YD25DDTi 133 hp (Navara D22 / NP300, from 2001)

    since 2001 · 133 hp · YD25DDTi

    With caution

    We have found no sources on the reliability of this version of the D22. The same YD25 code has a documented lower timing chain failure in the D40 and the Pathfinder (see faults), so check the history and the condition of the chain before buying.[1][2]

Buy: No known serious faults, or they have already been corrected, in this version. With caution: Worth buying if something specific is verified: history, a replaced part or a completed campaign. Avoid: High risk of a serious fault that is hard to check for or prevent.

Known faults of the 2.5 dCi YD25

Sorted from most to least important (severity × frequency).

  1. 1Critical severityFrequency: CommonTimingTiming chain wear and failureThe single chain at the bottom of the YD25 (the one that drives the injection pump) is the engine's weak point: it stretches and, if it jumps or breaks, the engine usually ends up rebuilt or replaced. It is heard as a rattle.Appears at around 100,000 km
  2. 2High severityFrequency: OccasionalTurboTurbocharger failureThe YD25's variable-geometry turbo can fail, causing loss of power, whistling and smoke, especially if the oil is dirty or lubrication is lacking. A French source places it from about 120,000 km.Appears at around 120,000 km
  3. 3Medium severityFrequency: CommonEmissions controlEGR valve clogged with carbonThe 2.5 dCi's EGR valve clogs with carbon and usually turns on the engine warning light. Farmers Weekly puts the replacement part at about £150.
  4. 4High severityFrequency: RareCylinder head and blockHead gasket damaged by overheatingOverheating can damage the YD25's head gasket or the cylinder head itself. Farmers Weekly warns: if the heater stops blowing hot it could be the gasket, with repairs of about £1,000.

Severity colours: low, medium, high, critical. How we rate them

By part

Compare each fault with the same part on other engines: symptoms, cost and affected models.

Symptoms of these faults

What the 2.5 dCi YD25 is

The YD25DDTi is a 2.5-litre (2,488 cc) four-cylinder diesel with an iron block, aluminium head, an intercooled variable-geometry turbo and common rail direct injection.[4]

In Europe it went from around 144 hp to 174 hp and reached 190 hp with the 2010 update, with up to 450 Nm of torque. It was fitted to the Navara D40 and the Pathfinder R51, among other Nissan models.[4][5]

The sources consulted agree on the timing chain as the weak point, although they also say that, with good maintenance, the engine can exceed 300,000 km. The Navara's chassis problems are independent of the engine.[1][2][3]

Manufacturer
Nissan
Family
YD
Fuel
Diesel
Displacement
2,488 cm³
Cylinders
4
Fuel system
Turbo
Injection
Common rail
Timing
Chain
Power
144–190 hp
Peak torque
450 Nm
Production
2005–2015
Makes
Nissan

Technical data[1][4][5]

What changed between versions

  1. since 2001

    2.5 YD25DDTi 133 hp (Navara D22 / NP300, from 2001)

    In the Navara D22, renamed NP300 in 2005 according to German Wikipedia, the YD25DDTi appears from 2001 with 98 kW (133 hp), below the 144 to 190 hp versions of the Navara D40 and the Pathfinder R51 in this file.[4][6]

  2. 2005–2010

    2.5 dCi 144 and 174 hp (YD25DDTi, 2005-2010)

    First European versions of the YD25DDTi: 144 hp and later 174 hp, with a variable-geometry turbo and common rail injection.[4][5]

  3. 2010–2015

    2.5 dCi 190 hp (YD25DDTi, 2010-2015)

    After the 2010 update, power rises to 190 hp and torque to 450 Nm.[4][5]

Cars fitted with the 2.5 dCi YD25

3 models sold in Europe. Open each one to see all their faults and the buying checklist.

Nissan

Compare the 2.5 dCi YD25

Maintenance parts for the 2.5 dCi YD25

The parts replaced at services and when the timing belt or chain is changed, searched for this engine. Confirm the part number with the registration plate or VIN.

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Are you buying a car with the 2.5 dCi YD25?

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, at how many kilometres and how much you paid. Report your fault.

Sources

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

  1. Tips for buying a second-hand pickup: Nissan NavaraFarmers Weekly Interactive · Motoring press · consulted 5 October 2026
  2. YD25 Engine Guide: Specs, Reliability, Problems & Buying TipsAutopartswd · Technical documentation · consulted 5 October 2026
  3. Nissan Navara ProblemeCarwiki.de · Other source · consulted 5 October 2026 · in German
  4. Nissan YD engineWikipedia · Other source · consulted 5 October 2026
  5. Nissan NavaraWikipedia · Other source · consulted 5 October 2026
  6. Nissan NavaraWikipedia (alemán) · Other source · consulted 2 November 2026 · in German