BMW B48 / B38 vs 1.5 VC-Turbo e-Power: which engine is more reliable?

According to our risk index, the BMW B48 / B38 carries less risk than the 1.5 VC-Turbo e-Power: 24/100 (low risk) versus 36/100 (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 1.5 VC-Turbo e-Power has 3 documented serious faults, the main one being «Safe mode due to battery controller calibration (loss of propulsion)».

Risk index

BMW B48 / B38

Low risk · 1 serious fault

Lower risk

Risk index

1.5 VC-Turbo e-Power

Moderate risk · 3 serious faults

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

Reviewed on 29 October 202613 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 1.5 VC-Turbo e-Power reliable?

There is still little reliability data: the three-cylinder 1.5 VC-Turbo only generates electricity and no mechanical faults are known in Europe. The documented weak points are in the e-Power electronics: battery campaigns and isolated cases of immobilisation.^[4][5][6]

See the 4 of the 1.5 VC-Turbo e-Power faults

Side-by-side comparison

Comparison of BMW B48 / B38 and 1.5 VC-Turbo e-Power
Item	BMW B48 / B38	1.5 VC-Turbo e-Power
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	1,998 cm³	1,497 cm³
Timing	Chain	—
Power	136–312 hp	190–213 hp
Production	since 2014^[1][7][8]	since 2022^{[9][10][11][12]}
Reliability
Risk index (what is it?)	24Low risk	36Moderate risk
Documented faults	4	4
Of high or critical severity	1	3
Worst severity	High severity	High 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	High severity: Safe mode due to battery controller calibration (loss of propulsion) High severity: Fuel line that slips out of its clip and may leak Medium severity: e-Power warning and limited mode due to incorrect state-of-charge reading
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][13] 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	1.5 VC-Turbo e-Power 190 hp (Qashqai J12, since 2022)^[4][5][6] 1.5 VC-Turbo e-Power 204 hp (X-Trail T33, front-wheel drive, since 2022)^[4][9] 1.5 VC-Turbo e-Power e-4ORCE 213 hp (X-Trail T33, all-wheel drive, since 2022)^[9][11]
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 17 models with the BMW B48 / B38

1.5 VC-Turbo e-Power

Other comparisons

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With the 1.5 VC-Turbo e-Power

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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
Fiabilidad y averías del Nissan Qashqai 3 (2021)fiches-auto.fr · Motoring press · consulted 29 October 2026 · in French
Nissan Qashqai: richiamo per la batteria del sistema ibridoalVolante · Motoring press · published 4 August 2026 · consulted 29 October 2026 · in Italian
Nissanowski SUV z usterką systemu zarządzania akumulatoremAutokatalog.pl · Motoring press · published 2025 · consulted 29 October 2026 · in another language
BMW B38Wikipedia (inglés) · Other source · consulted 27 September 2026
BMW B48Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Nissan X-Trail - WikipediaWikipedia · Other source · consulted 29 October 2026
Nissan KR engine - WikipediaWikipedia · Other source · consulted 29 October 2026
Nissan X-Trail (T33) - Wikipedia (versión alemana)Wikipedia · Other source · consulted 29 October 2026 · in German
Nissan z novim Qashqaijem uvaja e-Power v EvropiRTV Slovenija · General press · published 19 February 2021 · consulted 29 October 2026 · in another language
5 BMWs That Prove the B48 Four-Cylinder Engine Is Better Than You ThinkBMWBLOG · Other source · published April 2026 · consulted 27 September 2026