BMW M47 vs 1.4 D-4D: which engine is more reliable?

According to our risk index, the 1.4 D-4D carries less risk than the BMW M47: 48/100 (moderate 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 1.4 D-4D has 2 documented serious faults, the main one being «Turbocharger failure».

Risk index

BMW M47

Very high risk · 3 serious faults

Risk index

1.4 D-4D

Moderate 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

Reviewed on 27 September 202615 sources How 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 1.4 D-4D reliable?

Yes, generally: the 1.4 D-4D (1ND-TV) is one of Toyota's most widespread small diesels, with a reputation for reasonable reliability. The documented weak points are the injectors, the turbo, the EGR valve, the diesel particulate filter (on versions that have one) and the clutch and dual-mass flywheel assembly, with cases spread between 2002 and 2018 across the Yaris, Corolla, Auris, Urban Cruiser, Verso-S and MINI One D.^{[5][6][7][8][9]}

See the 6 of the 1.4 D-4D faults

Side-by-side comparison

Comparison of BMW M47 and 1.4 D-4D
Item	BMW M47	1.4 D-4D
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	1,995 cm³	1,364 cm³
Timing	Chain	Chain
Power	116–163 hp	75–90 hp
Production	1998–2007^{[1][2][10][11]}	2002–2018^[5][12]
Reliability
Risk index (what is it?)	79Very high risk	48Moderate risk
Documented faults	6	6
Of high or critical severity	3	2
Worst severity	Critical severity	High severity
Main faults	Critical severity: Intake swirl flap breakage (swirl flaps) High severity: Loss of power and turbo faults Medium severity: Blocked and seized injectors	High severity: Turbocharger failure High severity: Oil build-up in the intercooler of the 1.4 D-4D (2014 campaign) Medium severity: Injector wear and failure
Most expensive documented repair	up to €300Faulty air flow meter on the BMW M47 (loss of power)Published figure^[13]	No reliable data
Which versions to buy
BuyRecommended versions	M47D20 116-136 hp (1998-2001)^[1][3]	None
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][14]	1.4 D-4D 75 (1ND-TV, 75 hp, 2002-2005)^[7][9] 1.4 D-4D 90 (1ND-TV, 88-90 hp, 2004-2018)^[6][8][15]
AvoidVersions to avoid	None	None

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

1.4 D-4D

See the 8 models with the 1.4 D-4D

Other comparisons

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With the 1.4 D-4D

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Sources

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

BMW M47Wikipedia (inglés) · Other source · consulted 27 September 2026
BMW M47D20 engine specifications, problems and reliabilityBimmerPulse · Technical documentation · consulted 27 September 2026
Motor BMW M47: problemas y averíasDasercars · Technical documentation · consulted 27 September 2026 · in Spanish
BMW 3er E46: typische Probleme und SchwachstellenGebrauchtwagenberater · Technical documentation · consulted 27 September 2026 · in German
Toyota ND engineWikipedia · Other source · consulted 27 September 2026
Toyota Yaris 2 (2005-2011) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Toyota Yaris (1999-2005) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Toyota Auris (2007-2012) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Mini Mini (2001-2006) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
BMW M47Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
BMW 3 Series (E46)Wikipedia (inglés) · Other source · consulted 27 September 2026
Toyota Corolla (E120)Wikipedia · Other source · consulted 27 September 2026
Caudalímetro o sensor MAF: qué es, cómo funciona y cuáles son las averías más frecuentesDiariomotor · Motoring press · consulted 30 October 2026 · in Spanish
Rover 75Wikipedia (inglés) · Other source · consulted 27 September 2026
Toyota Corolla (2002-2007) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French