BMW B57 vs 2.0 dCi: which engine is more reliable?

According to our risk index, the BMW B57 carries less risk than the 2.0 dCi: 22/100 (low risk) versus 52/100 (high risk). The BMW B57 has 3 documented serious faults, the main one being «EGR cooler leaks on the B57 (limited action on the 540d xDrive)»; the 2.0 dCi has 2 documented serious faults, the main one being «Premature turbocharger failure».

Risk index

BMW B57

Low risk · 3 serious faults

Lower risk

Risk index

2.0 dCi

High risk · 2 serious faults

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

Reviewed on 4 October 202614 sources How we work

Is the BMW B57 reliable?

The BMW B57 (2015 onwards) is the six-cylinder diesel that succeeded the N57. The sources consulted document no widespread faults: its most cited weak point is the AdBlue/SCR system, and it was left out of the big EGR campaigns that hit the N47 and N57. The timing chain is still at the back, next to the gearbox.^[1][2]

See the 4 of the BMW B57 faults

Is the 2.0 dCi reliable?

The 2.0 dCi (M9R) is a Renault-Nissan Alliance diesel with known, well-documented weak points: the turbo and the EGR valve fail relatively often, the particulate filter clogs up in urban use, and there are cases of injectors and even the timing chain failing earlier than expected in several of the models that use it.^[3][4][5][6]

See the 5 of the 2.0 dCi faults

Side-by-side comparison

Comparison of BMW B57 and 2.0 dCi
Item	BMW B57	2.0 dCi
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	2,993 cm³	1,995 cm³
Timing	Chain	Chain
Power	265–400 hp	90–177 hp
Production	since 2015^[7][8]	2005–2016^{[9][10][11][12]}
Reliability
Risk index (what is it?)	22Low risk	52High risk
Documented faults	4	5
Of high or critical severity	3	2
Worst severity	High severity	Critical severity
Main faults	Medium severity: AdBlue/SCR system fault (NOx sensors, heater and pump) High severity: EGR cooler leaks on the B57 (limited action on the 540d xDrive) High severity: Timing chain wear on the gearbox side	High severity: Premature turbocharger failure Critical severity: Timing chain wear or breakage Medium severity: Clogged particulate filter (DPF)
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	B57D30 265 hp, single turbo (B57D30O0, 2015-2020)^[1] B57D30 286-340 hp, twin turbo with 48 V (B57D30O2/T2, 2020 onwards)^[1]	None
With cautionVersions to be cautious about	B57D30 320 hp, twin turbo (B57D30T0, 2015-2020)^[1] B57D30 400 hp, four turbos (B57D30S0, 2016-2020)^[1]	2.0 dCi 130-150 (M9R, cars, 2005-2012)^[3][4][6] 2.0 dCi 160-177 (M9R, higher-output cars, 2006-2016)^[4][5][13] 2.0 dCi 90-115 (M9R, vans, 2006-2014)^[14]
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 B57

See the 8 models with the BMW B57

2.0 dCi

See the 12 models with the 2.0 dCi

Other comparisons

With the BMW B57

With the 2.0 dCi

Compare other engines

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Sources

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

Motor BMW B57: fiabilidad y averíasDasercars · Motoring press · consulted 4 October 2026 · in Spanish
Motor BMW N57: diferencias con el B57Dasercars · Motoring press · consulted 4 October 2026 · in Spanish
Fiabilité Renault Laguna 3 : pannes et avisFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité Renault Koleos : pannes et avisFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité Renault Espace 4 : pannes et avisFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité Nissan Qashqai : pannes et avisFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
BMW B57 (Wikipedia en)Wikipedia · Other source · consulted 4 October 2026
BMW B57 (Wikipedia de)Wikipedia · Other source · consulted 4 October 2026 · in German
Anexo:Motores de RenaultWikipedia · Other source · consulted 27 September 2026 · in Spanish
Renault KoleosWikipedia · Other source · consulted 27 September 2026
Renault Mégane IIIWikipedia · Other source · consulted 27 September 2026 · in French
Renault Grand Espace 2.0 dCi PrivilegeAutopista · Motoring press · published 19 September 2006 · consulted 27 September 2026 · in Spanish
Fiabilité Nissan X-Trail : pannes et avisFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Renault TraficWikipedia · Other source · consulted 27 September 2026