BMW B38 / B37 vs 2.2 Ecotec gasolina: which engine is more reliable?

According to our risk index, the BMW B38 / B37 carries less risk than the 2.2 Ecotec gasolina: 20/100 (low risk) versus 50/100 (high risk). The BMW B38 / B37 has 1 documented serious fault, the main one being «B38 crankshaft thrust bearing failure (units before April 2015)»; the 2.2 Ecotec gasolina has 1 documented serious fault, the main one being «Stretched timing chain and seized tensioner on the 2.2 Ecotec».

Risk index

BMW B38 / B37

Low risk · 1 serious fault

Lower risk

Risk index

2.2 Ecotec gasolina

High risk · 1 serious fault

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

Reviewed on 2 November 202618 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 3 of the BMW B38 / B37 faults

Is the 2.2 Ecotec gasolina reliable?

This is the 2.2 petrol engine producing 147 to 155 hp in the Astra G, Zafira, Vectra and Signum. Its documented weak point is the timing chain, which stretches and can end in serious engine damage; the 2.2 Direct adds a high-pressure pump prone to failure.^[4][5][6]

See the 2 of the 2.2 Ecotec gasolina faults

Side-by-side comparison

Comparison of BMW B38 / B37 and 2.2 Ecotec gasolina
Item	BMW B38 / B37	2.2 Ecotec gasolina
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	1,499 cm³	2,198 cm³
Timing	Chain	Chain
Power	75–231 hp	147–155 hp
Production	since 2014^[7][8][9]	2000–2010^{[10][11][12][13]}
Reliability
Risk index (what is it?)	20Low risk	50High risk
Documented faults	3	2
Of high or critical severity	1	1
Worst severity	Critical severity	Critical severity
Main faults	Critical severity: B38 crankshaft thrust bearing failure (units before April 2015) Medium severity: Coolant leaks and water pump or thermostat failure on the B38 Low severity: Carbon build-up on the B38's intake valves and injectors	Critical severity: Stretched timing chain and seized tensioner on the 2.2 Ecotec Medium severity: Faulty high-pressure pump or pressure regulator (P1191) on the 2.2 Direct
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^[14] B37TÜ1 1.5 diesel 95-116 hp (from late 2017)^[15]	None
With cautionVersions to be cautious about	B38 1.2 (B38A12, MINI One)^[8] B38 1.5 136 hp up to April 2015 (B38A15)^[1] B38K15T0 231 hp (BMW i8)^[16]	2.2 16V 147 hp (Z22SE, 2000-2005)^[4][5][17] 2.2 Direct 150-155 hp (Z22YH, 2003-2010)^{[4][5][6][18]}
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 17 models with the BMW B38 / B37

2.2 Ecotec gasolina

Other comparisons

With the BMW B38 / B37

With the 2.2 Ecotec gasolina

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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
PROTIPS febi 33044: tensor de cadena para los motores Opel 2.2 de gasolina (Z22YH y Z22SE)febi bilstein (Ferdinand Bilstein GmbH) · Technical documentation · published January 2019 · consulted 2 November 2026 · in German
Opel Vectra C: ProblemeGebrauchtwagenberater.de · Motoring press · consulted 2 November 2026 · in German
Opel Zafira B 2005-2014: Probleme und SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 2 November 2026 · in German
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
Opel Astra GWikipedia (de) · Other source · consulted 2 November 2026 · in German
Opel Zafira AWikipedia (de) · Other source · consulted 2 November 2026 · in German
Opel Vectra CWikipedia (de) · Other source · consulted 2 November 2026 · in German
Opel Zafira BWikipedia (de) · Other source · consulted 2 November 2026 · in German
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
BMW i8 (Wikipedia)Wikipedia · Other source · consulted 4 October 2026
Fiabilité Opel Zafira (1999-2005): pannes par moteurFiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
Blitz-Info: Opel Signum 2.2 L, año 2003-2004, motor Z22YH (testigo del motor encendido)Hella · Technical documentation · published 31 March 2006 · consulted 2 November 2026 · in German