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BMW B57 vs 1.8/2.2 DI-D: which engine is more reliable?

According to our risk index, the BMW B57 carries less risk than the 1.8/2.2 DI-D: 22/100 (low risk) versus 46/100 (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 1.8/2.2 DI-D has 3 documented serious faults, the main one being «Clogged particulate filter and oil dilution».

Risk index

BMW B57

22

Low risk · 3 serious faults

Lower risk

Risk index

1.8/2.2 DI-D

46

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

11 sourcesHow 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 1.8/2.2 DI-D reliable?

Yes, in general: Mitsubishi's own 1.8 DI-D (4N13) and 2.2 DI-D (4N14) diesels have a reputation for reliability compared with the Volkswagen and PSA engines they replaced in 2010. Their best-documented fault is a clogged particulate filter with oil dilution on short journeys, along with occasional cases of injector, turbo and balance shaft problems. Do not confuse them with the PSA 2.2 HDi that the Outlander used earlier, shared with the C-Crosser and the Peugeot 4007.[3][4][5][6]

See the 4 of the 1.8/2.2 DI-D faults

Side-by-side comparison

Comparison of BMW B57 and 1.8/2.2 DI-D
BMW B571.8/2.2 DI-D
Technical data
TypeEngineEngine
FuelDieselDiesel
Displacement2,993 cm³—
TimingChainChain
Power265–400 hp116–177 hp
Productionsince 2015[7][8]since 2010[3][9][10][11]
Reliability
Risk index (what is it?)22Low risk46Moderate risk
Documented faults44
Of high or critical severity33
Worst severityHigh severityHigh severity
Main faults
  1. Medium severity: AdBlue/SCR system fault (NOx sensors, heater and pump)
  2. High severity: EGR cooler leaks on the B57 (limited action on the 540d xDrive)
  3. High severity: Timing chain wear on the gearbox side
  1. High severity: Clogged particulate filter and oil dilution
  2. High severity: Turbocharger wear at high mileage
  3. Medium severity: Soot fouling of injectors and EGR valve
Most expensive documented repairNo reliable dataNo 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]
  • 1.8 DI-D 116 (4N13, 2010-2019)[5]
  • 1.8 DI-D 150 (4N13, 2010-2015)[5]
  • 2.2 DI-D 150 automatic (4N14, 2013-2015)[5]
  • 2.2/2.3 DI-D 177 MIVEC (4N14, 2010-2021)[6]
AvoidVersions to avoidNoneNone

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

1.8/2.2 DI-D

Other comparisons

With the BMW B57

With the 1.8/2.2 DI-D

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.

  1. Motor BMW B57: fiabilidad y averíasDasercars · Motoring press · consulted 4 October 2026 · in Spanish
  2. Motor BMW N57: diferencias con el B57Dasercars · Motoring press · consulted 4 October 2026 · in Spanish
  3. Mitsubishi OutlanderWikipedia (inglés) · Other source · consulted 27 September 2026
  4. Mitsubishi OutlanderWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
  5. Mitsubishi ASX – Typische Probleme & KrankheitenGebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
  6. Mitsubishi Outlander: bekannte Probleme und MängelGebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
  7. BMW B57 (Wikipedia en)Wikipedia · Other source · consulted 4 October 2026
  8. BMW B57 (Wikipedia de)Wikipedia · Other source · consulted 4 October 2026 · in German
  9. Mitsubishi 4N1 engineWikipedia (inglés) · Other source · consulted 27 September 2026
  10. Mitsubishi ASXWikipedia (inglés) · Other source · consulted 27 September 2026
  11. Mitsubishi ASXWikipedia (francés) · Other source · consulted 27 September 2026 · in French