BMW B57 vs 2.3 MultiJet: which engine is more reliable?

According to our risk index, the BMW B57 carries less risk than the 2.3 MultiJet: 22/100 (low risk) versus 25/100 (moderate 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 2.3 MultiJet has 2 documented serious faults, the main one being «Camshaft breakage due to a manufacturing defect (Ducato, 2016-2017)».

Risk index

BMW B57

Low risk · 3 serious faults

Lower risk

Risk index

2.3 MultiJet

Moderate 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 9 October 202616 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 2.3 MultiJet reliable?

The 2.3 MultiJet (F1A) in the Fiat Ducato and Iveco Daily has few faults with a solid source: the best documented are three campaigns on the 2016-2019 Euro 6 Ducato (intercooler hose, EGR pipe and camshaft). Owners and garages also cite EGR, throttle body, injectors and AdBlue, almost always on forums or commercial websites, with no statistics.^{[3][4][5][6][7][8][9]}

See the 6 of the 2.3 MultiJet faults

Side-by-side comparison

Comparison of BMW B57 and 2.3 MultiJet
Item	BMW B57	2.3 MultiJet
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	2,993 cm³	2,287 cm³
Timing	Chain	Timing belt (dry)
Power	265–400 hp	95–160 hp
Production	since 2015^[10][11]	since 2002^{[12][13][14][15]}
Reliability
Risk index (what is it?)	22Low risk	25Moderate risk
Documented faults	4	6
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	Critical severity: Camshaft breakage due to a manufacturing defect (Ducato, 2016-2017) Medium severity: EGR valve and throttle body clogged by carbon deposits and moisture Medium severity: Leaking or underperforming common-rail injectors
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]	First-batch 2.3 Multijet / HPI (F1AE0481, 2006-2011)^[7][15] 2.3 Multijet II Euro 5 (F1AE3481, 2010-2016)^[7][16] 2.3 Multijet Euro 6 with dual EGR (Ducato, 2016-2019)^[3][4][5][8] 2.3 Multijet 2 Euro 6d with AdBlue (Ducato, 2019-2021)^[9] 2.3 F1A in the Iveco Daily VI (2014-present)^[5]
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

2.3 MultiJet

Other comparisons

With the BMW B57

With the 2.3 MultiJet

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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
Fiat Ducato (2016-2017): manguito del intercooler (alerta Safety Gate A12/0285/18)car-recalls.eu (reproduce Safety Gate) · Other source · published 23 February 2018 · consulted 8 October 2026
Fiat Ducato (2016-2017): tubo de la EGR (alerta Safety Gate A12/1794/17)car-recalls.eu (reproduce Safety Gate) · Other source · published 16 December 2017 · consulted 8 October 2026
DVSA – base de llamadas a revisiónDVSA (Reino Unido) · Official body · consulted 8 October 2026
Camshaft fault sparks Fiat Ducato recallUte and Van Guide (Australia) · Motoring press · published 7 March 2017 · consulted 8 October 2026
Ducato multijet 2.3 starting problem (hilo del foro)The FIAT Forum · Owners' forum · published 3 May 2014 · consulted 8 October 2026
Ducato P0401 P0402 P0236 P0238 and limp mode, 2017 Euro 6 (hilo del foro)The FIAT Forum · Owners' forum · published 5 December 2021 · consulted 8 October 2026
Fiat Ducato 2.3 MultiJet: AdBlue, SCR y modo de emergencia (diagnóstico)KFZ Dietrich (taller, Alemania) · Other source · published 10 September 2026 · consulted 8 October 2026 · in German
BMW B57 (Wikipedia en)Wikipedia · Other source · consulted 4 October 2026
BMW B57 (Wikipedia de)Wikipedia · Other source · consulted 4 October 2026 · in German
Fiat DucatoWikipedia (es) · Other source · consulted 8 October 2026 · in Spanish
Fiat Ducato (tipo 250, motores Multijet y Euro 6)Wikipedia (de) · Other source · consulted 8 October 2026 · in German
Iveco Daily (motores HPI/F1A por generación)Wikipedia (de) · Other source · consulted 8 October 2026 · in German
Iveco Daily IV 35C12 2.3 HPI: fiabilidadCarverif · Other source · consulted 8 October 2026 · in French
Fiat Ducato and variants 2007 onCATMAG · Motoring press · consulted 8 October 2026