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BMW M47 vs 1.5 / 2.0 EcoBlue: which engine is more reliable?

According to our risk index, the 1.5 / 2.0 EcoBlue carries less risk than the BMW M47: 59/100 (high risk) versus 79/100 (very high risk). The BMW M47 has 3 documented serious faults, the main one being «Intake swirl flap breakage (swirl flaps)»; the 1.5 / 2.0 EcoBlue has 2 documented serious faults, the main one being «Degradation of the wet timing belt (2.0 EcoBlue)».

Risk index

BMW M47

79

Very high risk · 3 serious faults

Risk index

1.5 / 2.0 EcoBlue

59

High risk · 2 serious faults

Lower risk

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

12 sourcesHow we work

Is the BMW M47 reliable?

The BMW M47 (1998-2007, a 4-cylinder diesel fitted to the 3 Series E46/E90, 1 Series E87, 5 Series E60, X3 E83, the Rover 75 and the Land Rover Freelander) is solid in its basic mechanicals, but the common rail versions, built since 2001, carry a serious and well-documented problem: the intake manifold swirl flaps can break and enter the cylinder, with a risk of engine damage. The turbo and injectors also account for known faults.[1][2][3][4]

See the 6 of the BMW M47 faults

Is the 1.5 / 2.0 EcoBlue reliable?

EcoBlue has been Ford's diesel family since 2016, with two very different engines despite the shared name: the 2.0 (codenamed «Panther») debuted a wet timing belt (belt-in-oil) and a second wet belt for the oil pump, the same type of design that has caused problems on other Ford engines; the 1.5, by contrast, uses a conventional dry belt. The 2.0 powers vans, SUVs and large saloons; the 1.5 the smaller models.[5][6]

See the 3 of the 1.5 / 2.0 EcoBlue faults

Side-by-side comparison

Comparison of BMW M47 and 1.5 / 2.0 EcoBlue
BMW M471.5 / 2.0 EcoBlue
Technical data
TypeEngineEngine
FuelDieselDiesel
Displacement1,995 cm³—
TimingChainWet belt (belt-in-oil)
Power116–163 hp85–213 hp
Production1998–2007[1][2][7][8]since 2016[5][9]
Reliability
Risk index (what is it?)79Very high risk59High risk
Documented faults63
Of high or critical severity32
Worst severityCritical severityCritical severity
Main faults
  1. Critical severity: Intake swirl flap breakage (swirl flaps)
  2. High severity: Loss of power and turbo faults
  3. Medium severity: Blocked and seized injectors
  1. Critical severity: Degradation of the wet timing belt (2.0 EcoBlue)
  2. Critical severity: Wet oil pump belt (2.0 EcoBlue)
  3. Medium severity: Emissions system warnings (AdBlue/EGR) and injector wear
Most expensive documented repairup to €300Faulty air flow meter on the BMW M47 (loss of power)Published figure[10]No reliable data
Which versions to buy
BuyRecommended versions
  • M47D20 116-136 hp (1998-2001)[1][3]
  • 1.5 EcoBlue 85/95/100/120 (dry timing belt, since 2018)[6]
With cautionVersions to be cautious about
  • M47D20TU 116-150 hp (2001-2004)[1][3][4]
  • M47D20TU2 122-163 hp (2004-2007)[1]
  • M47R 116-131 hp (Rover 75, MG ZT and Land Rover Freelander, 1998-2006)[1][11]
  • 2.0 EcoBlue single-turbo 105/130/150/170/190, with and without mild hybrid (since 2016)[6][12]
  • 2.0 EcoBlue twin-turbo 213 (Ranger and high-demand applications, since ~2019)[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 M47

See the 8 models with the BMW M47

1.5 / 2.0 EcoBlue

See the 13 models with the 1.5 / 2.0 EcoBlue

Other comparisons

With the BMW M47

With the 1.5 / 2.0 EcoBlue

Compare other engines

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Sources

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

  1. BMW M47Wikipedia (inglés) · Other source · consulted 27 September 2026
  2. BMW M47D20 engine specifications, problems and reliabilityBimmerPulse · Technical documentation · consulted 27 September 2026
  3. Motor BMW M47: problemas y averíasDasercars · Technical documentation · consulted 27 September 2026 · in Spanish
  4. BMW 3er E46: typische Probleme und SchwachstellenGebrauchtwagenberater · Technical documentation · consulted 27 September 2026 · in German
  5. Ford EcoBlue engineWikipedia · Other source · consulted 27 September 2026
  6. Which Cars Have a Wet Belt? Full UK Engine List (2026)CarOkay · Other source · published 2026 · consulted 27 September 2026
  7. BMW M47Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
  8. BMW 3 Series (E46)Wikipedia (inglés) · Other source · consulted 27 September 2026
  9. Nuevo motor Ford 2.0 EcoBlue Diésel: más potente y ahorradorAutopista.es · Motoring press · published April 2016 · consulted 27 September 2026 · in Spanish
  10. Caudalímetro o sensor MAF: qué es, cómo funciona y cuáles son las averías más frecuentesDiariomotor · Motoring press · consulted 30 October 2026 · in Spanish
  11. Rover 75Wikipedia (inglés) · Other source · consulted 27 September 2026
  12. Todos los coches afectados ya por problemas de motor a causa de correas de distribución en aceiteAutopista.es · Motoring press · published February 2025 · consulted 27 September 2026 · in Spanish