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BMW B57 vs 1.5 / 2.0 EcoBlue: which engine is more reliable?

According to our risk index, the BMW B57 carries less risk than the 1.5 / 2.0 EcoBlue: 22/100 (low risk) versus 59/100 (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 1.5 / 2.0 EcoBlue has 2 documented serious faults, the main one being «Degradation of the wet timing belt (2.0 EcoBlue)».

Risk index

BMW B57

22

Low risk · 3 serious faults

Lower risk

Risk index

1.5 / 2.0 EcoBlue

59

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

8 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 1.5 / 2.0 EcoBlue reliable?

EcoBlue has been Ford's diesel family since 2016, with two very different engines despite the shared name: the 2.0 (codenamed «Panther») debuted a wet timing belt (belt-in-oil) and a second wet belt for the oil pump, the same type of design that has caused problems on other Ford engines; the 1.5, by contrast, uses a conventional dry belt. The 2.0 powers vans, SUVs and large saloons; the 1.5 the smaller models.[3][4]

See the 3 of the 1.5 / 2.0 EcoBlue faults

Side-by-side comparison

Comparison of BMW B57 and 1.5 / 2.0 EcoBlue
BMW B571.5 / 2.0 EcoBlue
Technical data
TypeEngineEngine
FuelDieselDiesel
Displacement2,993 cm³—
TimingChainWet belt (belt-in-oil)
Power265–400 hp85–213 hp
Productionsince 2015[5][6]since 2016[3][7]
Reliability
Risk index (what is it?)22Low risk59High risk
Documented faults43
Of high or critical severity32
Worst severityHigh severityCritical 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. Critical severity: Degradation of the wet timing belt (2.0 EcoBlue)
  2. Critical severity: Wet oil pump belt (2.0 EcoBlue)
  3. Medium severity: Emissions system warnings (AdBlue/EGR) and injector wear
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]
  • 1.5 EcoBlue 85/95/100/120 (dry timing belt, since 2018)[4]
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 EcoBlue single-turbo 105/130/150/170/190, with and without mild hybrid (since 2016)[4][8]
  • 2.0 EcoBlue twin-turbo 213 (Ranger and high-demand applications, since ~2019)[4]
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

1.5 / 2.0 EcoBlue

See the 13 models with the 1.5 / 2.0 EcoBlue

Other comparisons

With the BMW B57

With the 1.5 / 2.0 EcoBlue

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. Ford EcoBlue engineWikipedia · Other source · consulted 27 September 2026
  4. Which Cars Have a Wet Belt? Full UK Engine List (2026)CarOkay · Other source · published 2026 · consulted 27 September 2026
  5. BMW B57 (Wikipedia en)Wikipedia · Other source · consulted 4 October 2026
  6. BMW B57 (Wikipedia de)Wikipedia · Other source · consulted 4 October 2026 · in German
  7. Nuevo motor Ford 2.0 EcoBlue Diésel: más potente y ahorradorAutopista.es · Motoring press · published April 2016 · consulted 27 September 2026 · in Spanish
  8. Todos los coches afectados ya por problemas de motor a causa de correas de distribución en aceiteAutopista.es · Motoring press · published February 2025 · consulted 27 September 2026 · in Spanish