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BMW B47 vs 2.5 dCi YD25: which engine is more reliable?

According to our risk index, the 2.5 dCi YD25 carries less risk than the BMW B47: 59/100 versus 73/100 (both high risk). The BMW B47 has 3 documented serious faults, the main one being «EGR cooler leaks with risk of engine fire»; the 2.5 dCi YD25 has 3 documented serious faults, the main one being «Timing chain wear and failure».

Risk index

BMW B47

73

High risk · 3 serious faults

Risk index

2.5 dCi YD25

59

High risk · 3 serious faults

Lower risk

The index (0–100) weights the severity and frequency of the three most serious documented faults. How it is calculated

9 sourcesHow we work

Is the BMW B47 reliable?

The BMW B47 (since 2014, successor to the N47) improves the timing chain tensioner, guides and oil supply and greatly reduces the failure rate of its predecessor, but it is not free of problems: the EGR cooler has been the subject of several BMW technical campaigns for engine fire risk since 2018, and the turbo and particulate filter need careful maintenance.[1][2][3][4]

See the 4 of the BMW B47 faults

Is the 2.5 dCi YD25 reliable?

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.[5][6][7]

See the 4 of the 2.5 dCi YD25 faults

Side-by-side comparison

Comparison of BMW B47 and 2.5 dCi YD25
BMW B472.5 dCi YD25
Technical data
TypeEngineEngine
FuelDieselDiesel
Displacement1,995 cm³2,488 cm³
TimingChainChain
Power114–228 hp144–190 hp
Productionsince 2014[1]2005–2015[5][8][9]
Reliability
Risk index (what is it?)73High risk59High risk
Documented faults44
Of high or critical severity33
Worst severityCritical severityCritical severity
Main faults
  1. Critical severity: EGR cooler leaks with risk of engine fire
  2. High severity: Timing chain wear (improved, but is it really at the front?)
  3. High severity: Premature turbo wear from neglected maintenance
  1. Critical severity: Timing chain wear and failure
  2. High severity: Turbocharger failure
  3. Medium severity: EGR valve clogged with carbon
Most expensive documented repairup to €2,000Premature turbo wear from neglected maintenancePublished figure[3]No reliable data
Which versions to buy
BuyRecommended versionsNoneNone
With cautionVersions to be cautious about
  • B47 114-150 hp, single turbo (2014-)[2][4]
  • B47 168-190 hp, single turbo (2014-)[2][4]
  • B47 202-228 hp, twin-turbo (2015-)[2][4]
  • B47C20 (MINI Cooper D/SD and Countryman, 2014-)[1][4]
  • 2.5 dCi 144 and 174 hp (YD25DDTi, 2005-2010)[5][6]
  • 2.5 dCi 190 hp (YD25DDTi, 2010-2015)[5][6]
AvoidVersions to avoidNoneNone

Severity of each fault: green, low; amber, medium; red, high; dark red, critical. How we rate them

Cars that each one is fitted to

BMW B47

See the 19 models with the BMW B47

2.5 dCi YD25

Other comparisons

With the BMW B47

With the 2.5 dCi YD25

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Sources

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

  1. BMW B47Wikipedia (inglés) · Other source · consulted 26 September 2026
  2. 324.000 diésel de BMW tendrán que pasar por el taller en Europa, por un posible riesgo de incendio en la EGRDiariomotor · Motoring press · published 8 August 2018 · consulted 26 September 2026 · in Spanish
  3. Motor BMW B47: problemas, modelos y qué revisarCarexam · Motoring press · consulted 26 September 2026 · in Spanish
  4. Motor BMW B47 - Reparación EspecializadaDasercars · Technical documentation · consulted 26 September 2026 · in Spanish
  5. Tips for buying a second-hand pickup: Nissan NavaraFarmers Weekly Interactive · Motoring press · consulted 5 October 2026
  6. YD25 Engine Guide: Specs, Reliability, Problems & Buying TipsAutopartswd · Technical documentation · consulted 5 October 2026
  7. Nissan Navara ProblemeCarwiki.de · Other source · consulted 5 October 2026 · in German
  8. Nissan YD engineWikipedia · Other source · consulted 5 October 2026
  9. Nissan NavaraWikipedia · Other source · consulted 5 October 2026