BMW B47 vs 1.5 D (TUD5): which engine is more reliable?

According to our risk index, the 1.5 D (TUD5) carries less risk than the BMW B47: 19/100 (low risk) versus 73/100 (high risk). The BMW B47 has 3 documented serious faults, the main one being «EGR cooler leaks with risk of engine fire»; the 1.5 D (TUD5) has no documented serious faults.

Risk index

BMW B47

High risk · 3 serious faults

Risk index

1.5 D (TUD5)

Low risk · 0 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 202612 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 1.5 D (TUD5) reliable?

A small indirect-injection diesel, slow but simple, with a good reputation for durability once its early problems are behind it. Its documented weak point is the cylinder head gasket, with oil leaks that PSA corrected in stages between 1995 and 1998; other issues (high idle, pump leaks, glow plug connector) are occasional.^[5][6][7]

See the 3 of the 1.5 D (TUD5) faults

Side-by-side comparison

Comparison of BMW B47 and 1.5 D (TUD5)
Item	BMW B47	1.5 D (TUD5)
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	1,995 cm³	—
Timing	Chain	Timing belt (dry)
Power	114–228 hp	50–58 hp
Production	since 2014^[1]	1988–2004^[8][9][10]
Reliability
Risk index (what is it?)	73High risk	19Low risk
Documented faults	4	3
Of high or critical severity	3	0
Worst severity	Critical severity	Medium 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	Medium severity: Oil leaks from the cylinder head gasket and crankshaft seal Medium severity: Injection pump: high idle and leaks Low severity: Glow plug faults: corroded connector and glow plugs
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]	1.4 D 50 hp (TUD3Y, 1993-1994 on the 106)^[5][7] 1.5 D 54-58 hp (TUD5: VJZ, VJY and VJX, 1994-2003)^[5][11][12]
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 21 models with the BMW B47

1.5 D (TUD5)

Other comparisons

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With the 1.5 D (TUD5)

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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
Peugeot 106: fiche fiabilitéCaradisiac · Motoring press · consulted 2 November 2026 · in French
Citroën Saxo: fiche fiabilitéCaradisiac · Motoring press · consulted 2 November 2026 · in French
Quelle citadine d'occasion choisir ?L'argus · Motoring press · consulted 2 November 2026 · in French
PSA TUD engineWikipedia (en) · Other source · consulted 2 November 2026
Peugeot 106Wikipedia (de) · Other source · consulted 2 November 2026 · in German
Peugeot 106 1.5 D 58 ch: fiabilité du moteurFiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
Fiabilité Peugeot 106: pannes et avis des propriétairesFiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
Fiabilité Citroën Saxo: pannes et avis des propriétairesFiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French