BMW B47 vs 1.9 D / dTi: which engine is more reliable?

According to our risk index, the 1.9 D / dTi carries less risk than the BMW B47: 52/100 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 1.9 D / dTi has 3 documented serious faults, the main one being «Damaged cylinder head and head gasket (naturally aspirated 1.9 D)».

Risk index

BMW B47

High risk · 3 serious faults

Risk index

1.9 D / dTi

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

Reviewed on 2 November 202613 sources How 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 1.9 D / dTi reliable?

Renault's 1.9 D, 1.9 TD and 1.9 dTi diesels (F8Q, F8Qt and F9Q with an injection pump) have a reputation for longevity, but owner reviews repeat three weak points: the injection pump and cylinder head gasket on the naturally aspirated 1.9 D, and the auxiliary belt, EGR and turbo on the dTi. The common-rail 1.9 dCi is a different engine.^[5][6][7][8]

See the 7 of the 1.9 D / dTi faults

Side-by-side comparison

Comparison of BMW B47 and 1.9 D / dTi
Item	BMW B47	1.9 D / dTi
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	1,995 cm³	1,870 cm³
Timing	Chain	Timing belt (dry)
Power	114–228 hp	55–100 hp
Production	since 2014^[1]	1988–2006^[5][9][10]
Reliability
Risk index (what is it?)	73High risk	52High risk
Documented faults	4	7
Of high or critical severity	3	3
Worst severity	Critical severity	Critical severity
Main faults	Critical severity: EGR cooler leaks with risk of engine fire High severity: Timing chain wear (improved, but is it really at the front?) High severity: Premature turbo wear from neglected maintenance	High severity: Damaged cylinder head and head gasket (naturally aspirated 1.9 D) Critical severity: Brake servo vacuum pump: oil suction and loss of assistance High severity: Auxiliary and timing belt: breakage that can destroy the engine
Most expensive documented repair	up to €2,000Premature turbo wear from neglected maintenancePublished figure^[3]	No reliable data
Which versions to buy
BuyRecommended versions	None	None
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]	1.9 D 55/65 hp (F8Q, naturally aspirated indirect injection, 1988-2006)^{[6][7][8][11]} 1.9 TD/dT 90-95 hp (F8Qt, turbo with indirect injection, 1991-2001)^[5][8] 1.9 dTi 80-100 hp (F9Q with mechanical pump, direct injection and turbo, 1997-2002)^{[8][11][12][13]}
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 B47

See the 20 models with the BMW B47

1.9 D / dTi

See the 7 models with the 1.9 D / dTi

Other comparisons

With the BMW B47

With the 1.9 D / dTi

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Sources

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

BMW B47Wikipedia (inglés) · Other source · consulted 26 September 2026
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
Motor BMW B47: problemas, modelos y qué revisarCarexam · Motoring press · consulted 26 September 2026 · in Spanish
Motor BMW B47 - Reparación EspecializadaDasercars · Technical documentation · consulted 26 September 2026 · in Spanish
Moteur F (Renault)Wikipédia (francés) · Other source · consulted 2 November 2026 · in French
Renault Clio IIWikipédia (francés) · Other source · consulted 2 November 2026 · in French
Fiabilité Renault Clio 2 : pannes et avis des propriétairesFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French
Fiabilité Renault Mégane 1 (1995-2002) : pannes et avis des propriétairesFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French
Renault F-Type engineWikipedia (inglés) · Other source · consulted 2 November 2026
Renault Clio IIWikipedia (alemán) · Other source · consulted 2 November 2026 · in German
Fiabilité Renault Kangoo (1997-2007) : pannes et avis des propriétairesFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French
Fiabilité Renault Scénic 1 (1996-2003) : pannes et avis des propriétairesFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French
Fiabilité Renault Laguna 1 (1994-2001) : pannes et avis des propriétairesFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French