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BMW B57 vs Isuzu 2.5 / 3.0 / 1.9 Ddi: which engine is more reliable?

According to our risk index, the BMW B57 carries less risk than the Isuzu 2.5 / 3.0 / 1.9 Ddi: 22/100 (low risk) versus 43/100 (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 Isuzu 2.5 / 3.0 / 1.9 Ddi has 2 documented serious faults, the main one being «Broken teeth on the camshaft gear (2017 campaign)».

Risk index

BMW B57

22

Low risk · 3 serious faults

Lower risk

Risk index

Isuzu 2.5 / 3.0 / 1.9 Ddi

43

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

12 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 Isuzu 2.5 / 3.0 / 1.9 Ddi reliable?

These are the diesels of the Isuzu D-Max: the 2.5 twin-turbo (4JK1) and the 1.9 Ddi (RZ4E) of the European range, and the 2.5 and 3.0 of the Latin American Chevrolet D-Max. Auto Express speaks of enviable reliability; what is documented is diesel in the oil of the 2.5 on short journeys, soot in the EGR and a 2017 campaign for the camshaft gear.[3][4][5][6]

See the 3 of the Isuzu 2.5 / 3.0 / 1.9 Ddi faults

Side-by-side comparison

Comparison of BMW B57 and Isuzu 2.5 / 3.0 / 1.9 Ddi
BMW B57Isuzu 2.5 / 3.0 / 1.9 Ddi
Technical data
TypeEngineEngine
FuelDieselDiesel
Displacement2,993 cm³—
TimingChainGears
Power265–400 hp117–177 hp
Productionsince 2015[7][8]since 2012[6][9][10][11]
Reliability
Risk index (what is it?)22Low risk43Moderate 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: Broken teeth on the camshaft gear (2017 campaign)
  2. High severity: Diesel in the oil and clogged particulate filter on short journeys
  3. Medium severity: EGR valve blocked by soot
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]
  • 1.9 Ddi 163 hp (RZ4E, European D-Max from 2017)[3][6]
With cautionVersions to be cautious about
  • B57D30 320 hp, twin turbo (B57D30T0, 2015-2020)[1]
  • B57D30 400 hp, four turbos (B57D30S0, 2016-2020)[1]
  • 2.5 TD twin-turbo 163 hp (4JK1, European D-Max 2012-2017)[4][6]
  • 2.5 and 3.0 TD (4JK1 and 4JJ1, Latin American Chevrolet D-Max 2012-2020)[5][12]
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 9 models with the BMW B57

Isuzu 2.5 / 3.0 / 1.9 Ddi

Other comparisons

With the BMW B57

With the Isuzu 2.5 / 3.0 / 1.9 Ddi

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. Isuzu D-Max reviewAuto Express · Motoring press · published 16 October 2026 · consulted 2 November 2026
  4. Tips for buying a second-hand pickup: Isuzu D-MaxFarmers Weekly · Motoring press · published 17 December 2020 · consulted 2 November 2026
  5. Isuzu MU-X & D-Max common problems and solutionsUnsealed 4X4 · Motoring press · published 12 June 2026 · consulted 2 November 2026
  6. Isuzu D-Max: Camshaft Gear Teeth May Break (R/2017/194)Car-Recalls.co.uk (reproduce DVSA) · Other source · published 10 July 2017 · consulted 2 November 2026
  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. Isuzu D-MaxWikipedia (inglés) · Other source · consulted 2 November 2026
  10. Isuzu D-MAX 2. Generation (2012-2017): Modelle, Technische DatenADAC Autokatalog · Technical documentation · consulted 2 November 2026 · in German
  11. Isuzu D-MAX 2. Generation, 1. Facelift (2017-2020): Modelle, Technische DatenADAC Autokatalog · Technical documentation · consulted 2 November 2026 · in German
  12. Isuzu D-Max ProblemsCarsGuide · Motoring press · consulted 2 November 2026