BMW B48 / B38 vs 2.0 EcoBoost: which engine is more reliable?

According to our risk index, the BMW B48 / B38 carries less risk than the 2.0 EcoBoost: 24/100 (low risk) versus 38/100 (moderate risk). The BMW B48 / B38 has 1 documented serious fault, the main one being «Timing chain on the early units (2014-2018), redesigned in the B48TU»; the 2.0 EcoBoost has 1 documented serious fault, the main one being «Coolant entering the cylinders through block cracks».

Risk index

BMW B48 / B38

Low risk · 1 serious fault

Lower risk

Risk index

2.0 EcoBoost

Moderate 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 B48 / B38 reliable?

The BMW B48 (2.0 turbo, from 2014) and its three-cylinder sibling, the B38 (1.5), have a reputation as reliable engines within BMW's modern range: there is no serious, widespread fault on record, unlike the timing chain on the N47 diesel or the EGR fire risk on the B47. Keep an eye on the cooling circuit, the oil seals near the turbo and the VANOS, and the carbon build-up typical of direct injection; BMW revised the timing chain in 2018 (B48TU update).^[1][2][3]

See the 4 of the BMW B48 / B38 faults

Is the 2.0 EcoBoost reliable?

This is the direct-injection turbo 2.0 that Ford fitted from 2010 to the Mondeo, S-Max, Galaxy, Kuga and Focus ST, and that Volvo, Land Rover and Jaguar also used. Its most serious weak point is cracks in the block that let coolant into the cylinders (a Ford bulletin in North America; cited for the Mondeo and Kuga); we have not found a European recall.^[4][5][6][7]

See the 3 of the 2.0 EcoBoost faults

Side-by-side comparison

Comparison of BMW B48 / B38 and 2.0 EcoBoost
Item	BMW B48 / B38	2.0 EcoBoost
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	1,998 cm³	1,999 cm³
Timing	Chain	Chain
Power	136–312 hp	203–250 hp
Production	since 2014^[1][8][9]	2010–2018^[10][11]
Reliability
Risk index (what is it?)	24Low risk	38Moderate risk
Documented faults	4	3
Of high or critical severity	1	1
Worst severity	High severity	Critical severity
Main faults	Medium severity: Deterioration of hoses and seals in the cooling circuit, with coolant loss Medium severity: Oil leaks or seepage from seals and covers, near the turbo and the VANOS High severity: Timing chain on the early units (2014-2018), redesigned in the B48TU	Critical severity: Coolant entering the cylinders through block cracks Medium severity: Carbon build-up on injectors and intake valves from direct injection Medium severity: Turbo faults: sensor, pressure solenoid and noise
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	B38 1.5 136 hp (MINI Cooper, 118i)^[2] B48 2.0 178-197 hp (120i, 220i, 320i, 520i, X1/X2/X3 20i, MINI Cooper S)^[2] B48 2.0 252-258 hp (330i, 530i, X3/X4 xDrive30i)^[2][12] B48 2.0 up to 302-312 hp, high performance (MINI John Cooper Works, BMW X1 M35i)^[2]	None
With cautionVersions to be cautious about	None	2.0 EcoBoost 203/240 hp (Mondeo IV, S-Max I and Galaxy II, 2010-2014)^[4][13] 2.0 EcoBoost 203/240 hp (Mondeo V, S-Max II and Galaxy III, 2014-2018)^[4][5][14] 2.0 EcoBoost ST 250 hp (Focus ST, 2012-2018)^[13][15][16] 2.0 EcoBoost 242 hp 4x4 (Kuga II, 2017-2018)^[4][6] Volvo 2.0T 203 hp and T5 240 hp (B4204T6 and B4204T7, 2010-2013)^[10][17] Land Rover and Jaguar Si4 240 hp (Evoque, Freelander 2, Discovery Sport and XF, 2011-2016)^[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 B48 / B38

See the 21 models with the BMW B48 / B38

2.0 EcoBoost

See the 17 models with the 2.0 EcoBoost

Other comparisons

With the BMW B48 / B38

With the 2.0 EcoBoost

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Sources

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

BMW B48Wikipedia (inglés) · Other source · consulted 27 September 2026
Motor BMW B48: defectos, mantenimiento y guía de compraRecambios y Accesorios BMW (blog) · Technical documentation · consulted 27 September 2026 · in Spanish
BMW Reliability Has Changed, But the Internet Hasn't Caught UpBMWBLOG · Other source · published January 2026 · consulted 27 September 2026
TSB 19-2346: 2.0L EcoBoost - Coolant In Cylinders, White Exhaust Smoke And/Or Illuminated MILFord Motor Company · Manufacturer · published 19 December 2019 · consulted 2 November 2026
Ford Mondeo: Probleme, Krankheiten und Rückrufe (Mondeo MK5)Gebrauchtwagenberater.de · Other source · consulted 2 November 2026 · in German
Ford Kuga: Probleme, Krankheiten und Kaufberatung (Kuga MK2)Gebrauchtwagenberater.de · Other source · consulted 2 November 2026 · in German
Ford Mondeo (2010 – 2014): engine fire (código Ford 17S09)car-recalls.eu · Other source · published October 2021 · consulted 2 November 2026
BMW B38Wikipedia (inglés) · Other source · consulted 27 September 2026
BMW B48Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Ford EcoBoost engineWikipedia · Other source · consulted 2 November 2026
Ford Focus (third generation)Wikipedia · Other source · consulted 2 November 2026
5 BMWs That Prove the B48 Four-Cylinder Engine Is Better Than You ThinkBMWBLOG · Other source · published April 2026 · consulted 27 September 2026
Ford EcoBoost Probleme (2.0 und 2.3)Carwiki.de · Other source · consulted 2 November 2026 · in German
Ford Mondeo (tabla de motores del Mondeo V)Wikipedia · Other source · consulted 2 November 2026 · in Spanish
Used Ford Focus ST (Mk3, 2012-2019) review and buyer's guideAuto Express · Motoring press · consulted 2 November 2026
Fiabilité et pannes Ford Focus 3 (2011-2018)Fiches-auto.fr · Other source · consulted 2 November 2026 · in French
Volvo V60 I (2010 – 2018) – Typische Probleme & KrankheitenGebrauchtwagenberater.de · Other source · consulted 2 November 2026 · in German
Fiabilité et pannes Land Rover Range Rover Evoque (2011-2018)Fiches-auto.fr · Other source · consulted 2 November 2026 · in French