BMW B38 / B37 vs 2.0 and 2.2 16v EW10/EW12: which engine is more reliable?

The BMW B38 / B37 and the 2.0 and 2.2 16v EW10/EW12 tie on our risk index: 14/100 (low risk). The BMW B38 / B37 has 1 documented serious fault, the main one being «B38 crankshaft thrust bearing failure (units before April 2015)»; the 2.0 and 2.2 16v EW10/EW12 has no documented serious faults.

Risk index

BMW B38 / B37

Low risk · 1 serious fault

Risk index

2.0 and 2.2 16v EW10/EW12

Low risk · 0 serious faults

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

Reviewed on 9 October 202623 sources How we work

Is the BMW B38 / B37 reliable?

BMW and MINI's three-cylinder B38 (petrol) and B37 (diesel) have no serious, widespread documented fault. The only problem reported in the press is the crankshaft thrust bearing on early B38 units (up to April 2015), corrected by BMW. BMW's EGR campaigns affect four- and six-cylinder diesels, not the B37.^[1][2][3]

See the of the BMW B38 / B37 fault

Is the 2.0 and 2.2 16v EW10/EW12 reliable?

The EW10 (2.0) and EW12 (2.2) are naturally aspirated 16-valve petrol engines with a timing belt, which PSA fitted between 1999 and 2010 to the 206, 307, 406, 407, 607, 807, C4, C5 and C8, among others. According to owners there are no frequent internal failures: the most-cited problems are the ignition coils (the only fault also reported by the press), the exhaust and, on the 2.2, oil consumption.^{[4][5][6][7][8][9][10][11]}

See the of the 2.0 and 2.2 16v EW10/EW12 fault

Side-by-side comparison

Comparison of BMW B38 / B37 and 2.0 and 2.2 16v EW10/EW12
Item	BMW B38 / B37	2.0 and 2.2 16v EW10/EW12
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	1,499 cm³	—
Timing	Chain	Timing belt (dry)
Power	75–231 hp	135–177 hp
Production	since 2014^[12][13][14]	1999–2010^{[4][6][15][16]}
Reliability
Risk index (what is it?)	14Low risk	14Low risk
Documented faults	1	1
Of high or critical severity	1	0
Worst severity	Critical severity	Medium severity
Main faults	Critical severity: B38 crankshaft thrust bearing failure (units before April 2015)	Medium severity: Faulty ignition coils
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	B38 1.5 136-140 hp from April 2015 (B38A15 / B38B15)^[1] B37 1.5 diesel 95-116 hp (B37C15K0 / B37C15U0), up to 2017^[17] B37TÜ1 1.5 diesel 95-116 hp (from late 2017)^[18]	2.0 16v 136 hp (EW10J4, RFN/RFR, 1999-2005)^{[4][5][7][8][19][20]} 2.0 16v VVT 140-143 hp (EW10A, RFJ, 2004-2011)^[9][10][21]
With cautionVersions to be cautious about	B38 1.2 (B38A12, MINI One)^[13] B38 1.5 136 hp up to April 2015 (B38A15)^[1] B38K15T0 231 hp (BMW i8)^[22]	2.0 16v VVT 177 hp (EW10J4S, RFK, 2003-2008)^[7][19][21] 2.0 HPi 140 hp direct injection (EW10D, RLZ, 2001-2004)^[8][10] 2.2 16v 158-163 hp (EW12J4, 3FZ/3FY, 1999-2010)^{[8][9][11][16][23]}
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 B38 / B37

See the 14 models with the BMW B38 / B37

2.0 and 2.2 16v EW10/EW12

See the 13 models with the 2.0 and 2.2 16v EW10/EW12

Other comparisons

With the BMW B38 / B37

With the 2.0 and 2.2 16v EW10/EW12

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Sources

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

BMW Dreizylinder: Dauertest-Probleme des B38 behoben?BimmerToday · Motoring press · published 5 October 2017 · consulted 4 October 2026 · in German
2024: BMW recall due to EGR coolers extended againcar-recalls.eu · Motoring press · published 28 March 2024 · consulted 4 October 2026
BMW diésel Europa: llamada a revisión por el EGR y riesgo de incendioDiariomotor · Motoring press · consulted 4 October 2026 · in Spanish
PSA EW/DW engineWikipedia (inglés) · Other source · consulted 8 October 2026
Peugeot 307 Probleme und SchwachstellenGebrauchtwagenberater.de · Motoring press · published 2 November 2022 · consulted 8 October 2026 · in German
Peugeot 407 problems (reseña de Graham Smith)CarsGuide (Australia) · Motoring press · published 17 March 2015 · consulted 8 October 2026
Tous les problèmes sur Peugeot 307 2001-2008 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
Tous les problèmes sur Peugeot 406 1995-2004 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
Tous les problèmes sur Peugeot 407 2004-2010 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
Tous les problèmes sur Citroën C5 2001-2008 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
Tous les problèmes sur Citroën C8 2002-2015 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
BMW B38 (Wikipedia)Wikipedia · Other source · consulted 4 October 2026
BMW B38 (Wikipedia, alemán)Wikipedia · Other source · consulted 4 October 2026 · in German
BMW B37 (Wikipedia)Wikipedia · Other source · consulted 4 October 2026
Peugeot 406Wikipedia (inglés) · Other source · consulted 8 October 2026
Peugeot 307 2.0 16V 140 ch: courroie de distribution (intervalo, tiempo y riesgo)Mecazen · Other source · consulted 8 October 2026 · in French
Project one M: MINI Cooper D F56 fährt eine Million Kilometer in 12 JahrenBimmerToday · Motoring press · published 24 June 2026 · consulted 4 October 2026 · in German
BMW Baukasten-Diesel: Mehr Infos zur TÜ1 für B47 und B37BimmerToday · Motoring press · published 20 November 2017 · consulted 4 October 2026 · in German
Tous les problèmes sur Peugeot 206 1998-2006 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
Tous les problèmes sur Citroën Xsara Picasso 1999-2010 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
Tous les problèmes sur Citroën C4 2004-2010 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
BMW i8 (Wikipedia)Wikipedia · Other source · consulted 4 October 2026
Tous les problèmes sur Peugeot 607 2000-2011 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French